Refine
Year of publication
Document Type
- Article (142)
- Preprint (36)
- Report (2)
- Review (2)
- Conference Proceeding (1)
- Working Paper (1)
Has Fulltext
- yes (184)
Is part of the Bibliography
- no (184)
Keywords
- LHC (7)
- Breast cancer (4)
- breast cancer (4)
- ALICE (3)
- ALICE experiment (3)
- Depression (3)
- Hadron-Hadron Scattering (3)
- pp collisions (3)
- Beauty production (2)
- Bipolar disorder (2)
- COVID-19 (2)
- Diagnostik (2)
- Früherkennung (2)
- Gene expression (2)
- HNSCC (2)
- Mammakarzinom (2)
- Nachsorge (2)
- Richtlinie (2)
- SARS-CoV-2 (2)
- Single electrons (2)
- Surgery (2)
- diagnosis (2)
- follow‑up (2)
- guideline (2)
- screening (2)
- 18-Hydroxycorticosteron (1)
- 18-OH corticosterone (1)
- 900 GeV (1)
- AChE (1)
- APP (1)
- Active middle ear implants (1)
- Adherencia terapéutica (1)
- Afghanistan (1)
- Alzheimer (1)
- Amizon (1)
- Amyloid precursor protein (1)
- Anandamide (1)
- Animal models (1)
- Anti-seizure medication (1)
- Antirheumatic agents (1)
- Arteria ophthalmica (1)
- Artificial Intelligence (1)
- Atoms (1)
- Auditory system (1)
- Behavior (1)
- Biodiversity Data (1)
- Biomonitoring (1)
- Blindness (1)
- Bone conduction devices (1)
- Bone metastases (1)
- Botanical Collections (1)
- Business strategy in drug development (1)
- C3M (1)
- C4M (1)
- CA1 (1)
- CCL2 (1)
- CRISPR/Cas (1)
- CVID (1)
- Cell membranes (1)
- Charm physics (1)
- Chemical dispersant (1)
- Child (1)
- Child abuse (1)
- Childhood abuse (1)
- Clinical Trials and Observations (1)
- Clinical genetics (1)
- Clinical variation (1)
- Cognitive impairment (1)
- Compact astrophysical objects (1)
- Comparative effectiveness research (1)
- Comparison with QCD (1)
- Complex posttraumatic stress disorder (1)
- Compression stocking (1)
- Consensus (1)
- Consensus statement (1)
- Conservation (1)
- Conservation biogeography (1)
- DBT (1)
- DBT-PTS (1)
- DBT-PTSD (1)
- DBTTSD (1)
- Dataset bias (1)
- Ddialectic behavioural therapy (1)
- Deep vein thrombosis (1)
- Dermatomyositis (1)
- Diagnosis (1)
- Diagnostic markers (1)
- Dialectical behavioural therapy (1)
- Digital breast tomosynthesis (DBT) (1)
- Digital mammography (1)
- Digitization (1)
- Drug therapy (1)
- Dtherapeutic adherencetreatment integrity (1)
- EROD (1)
- Elderly (1)
- Embryo toxicity (1)
- Endocrinology (1)
- Epilepsy (1)
- European Society for Immunodeficiencies (ESID) (1)
- Everolimus (1)
- Excitability (1)
- Exilliteratur (1)
- Exilschriftsteller (1)
- Exilverlag (1)
- Exosomes (1)
- Extended donor criteria (1)
- FAV00A (1)
- FDG-PET/CT (1)
- FDM (1)
- Femtoscopy (1)
- Filler (1)
- Forschungsdatenmanagement (1)
- Frailty (1)
- Freiligrath, Ferdinand (1)
- Galaxies and clusters (1)
- General practitioners (1)
- Genetic wildlife monitoring (1)
- Genetics (1)
- Genome editing (1)
- German PID-NET registry (1)
- Glabella (1)
- Global positioning system (1)
- Guanine nucleotide exchange factors (1)
- Guanosine triphosphatase (1)
- HBT (1)
- HDAC4 (1)
- HER2-positive (1)
- HPV-positive OPSCC (1)
- Hadron production (1)
- Hair sampling (1)
- Head and neck cancer (1)
- Head neck cancer (1)
- Health policy (1)
- Heavy Ions (1)
- Heavy flavor production (1)
- Heavy flavour production (1)
- Heavy ions (1)
- Heavy-flavour production (1)
- Heavy-ion collisions (1)
- Heinzen, Karl (1)
- Herbaria (1)
- High-energy astrophysics (1)
- Human behaviour (1)
- Hypertension (1)
- IN-VIVO (1)
- IS (1)
- IgG substitution therapy (1)
- Immunology (1)
- Immunotherapy (1)
- In situ burning (1)
- Inclusive spectra (1)
- Induction therapy (1)
- Inflammation (1)
- Integridad del tratamiento (1)
- Intensity interferometry (1)
- Intravenous injections (1)
- Ions (1)
- Irak (1)
- Islamischer Staat (1)
- Jets (1)
- Kidney diseases (1)
- Knockout (1)
- LOCKED NUCLEIC-ACID (1)
- Landesinitiative (1)
- Landesinitiative für Forschungsdatenmanagement (1)
- Lee-type (1)
- Library screening (1)
- Literarisches Institut (Herisau) (1)
- Luciferase (1)
- Lure sticks (1)
- Lymphoid Neoplasia (1)
- MAMMALIAN-CELLS (1)
- MODIFIED OLIGONUCLEOTIDES (1)
- Marker genes (1)
- Mental health and psychiatry (1)
- MicroRNAs (1)
- Microarray (1)
- Microglial cells (1)
- Mid-rapidity (1)
- Mixed hearing loss (1)
- Mott metal-insulator transition (1)
- Mouse models (1)
- Multi-stakeholder approach (1)
- Multi-strange baryons (1)
- NCoR1 (1)
- NFDI (1)
- NMDA IgA/IgM antibodies (1)
- NMDA antibody (1)
- Nationale Forschungsdateninfrastruktur (1)
- Nebennierenrinden-Adenom (1)
- Nebennierenrinden-Hyperplasie (1)
- Neoadjuvant therapy (1)
- Neuronal morphology (1)
- Neurons (1)
- Neuroscience (1)
- Noninvasive genetic sampling (1)
- Nuclear modification factor (1)
- Occlusion (1)
- Oldest-old (1)
- Oncology (1)
- Ophthalmoplegia (1)
- Optogenetics (1)
- Organ allocation (1)
- PASSENGER-STRAND (1)
- PID prevalence (1)
- PTS (1)
- PTSD (1)
- PYTHIA (1)
- Pancreas transplantation (1)
- Parkinson disease (1)
- Pathological complete response (1)
- Patterns of care (1)
- Pb–Pb (1)
- Perturbative methods (1)
- Phosphorylation (1)
- Pooling (1)
- Population-based screening (1)
- Post-traumatic stress disorder (1)
- Posttraumatic stress disorder (1)
- Proton–proton (1)
- Psychological and psychosocial issues (1)
- Pulmonary embolism (1)
- Quality of life (1)
- RDM (1)
- RNA polymerase (1)
- RT-qPCR (1)
- Radiotherapy (1)
- Randomised controlled trial (1)
- Recall rate (1)
- Red blood cell transfusion (1)
- Referenzwechsel (1)
- Rehabilitation (1)
- Rejection (1)
- Relativistic heavy ion physics (1)
- Research Data Management (1)
- Research Infrastructure (1)
- Retinal diseases (1)
- Revolution <1848> (1)
- Rhabdomyoma (1)
- SENP (1)
- SMALL INTERFERING RNA (1)
- STRUCTURAL BASIS (1)
- SUMO (1)
- Salivary gland carcinoma (1)
- Scattering of atoms, molecules, clusters & ions (1)
- Scattering theory (1)
- Schweiz (1)
- Seizure (1)
- Semantics (1)
- Single muons (1)
- Small molecules (1)
- Spine density (1)
- Sprachtypologie (1)
- Swimming behavior (1)
- Synaptic plasticity (1)
- Syrien (1)
- TEPT (1)
- TGFB-induced factor homeobox 1 (1)
- TGIF (1)
- Taliban (1)
- Taxonomy (1)
- Technical data (1)
- Terapia Dialéctica Conductual (1)
- Tetrahydro-Aldosteron (1)
- Therapeutics (1)
- Transverse momentum (1)
- Trastorno de estrés postraumático (1)
- Triple negative (1)
- Type 2 diabetes (1)
- Venous thromboembolism (1)
- Vesicles (1)
- Yellow fluorescent protein (1)
- adrenal adenomas (1)
- anaemia (1)
- anterior chamber depth changes (1)
- antibiotic therapy (1)
- antibodies (1)
- apex (1)
- ascites (1)
- autoantibodies (1)
- b-cell lymphomas (1)
- bendamustine (1)
- biopsy (1)
- cardiac I/R injury (1)
- cataract surgery (1)
- cetuximab (1)
- charge-cluster glass (1)
- chemotherapy regimen (1)
- chimeric antigen receptor t-cell therapy (1)
- chimeric antigen receptors (1)
- collagen degradation marker (1)
- combined modality therapy (1)
- dentate gyrus (1)
- diabetic macular edema (1)
- dislocation (1)
- double immune checkpoint inhibition (1)
- e-scooter (1)
- effective lens position (1)
- elderly patients (1)
- electric scooter (1)
- fear conditioning (1)
- fluctuation spectroscopy (1)
- fluocinolone acetonide (1)
- fracture (1)
- functional outcome (1)
- glass-like structural ordering (1)
- head and neck neoplasms (1)
- hematopoietic stem cell transplantation (1)
- imaging (1)
- immunoprecipitation (1)
- immunostaining (1)
- immunotherapy (1)
- in situ hybridization (1)
- induction therapy (1)
- lapatinib (1)
- laser microdissection (1)
- learning (1)
- leukapheresis (1)
- liver cirrhosis (1)
- lymphoma (1)
- mTOR inhibitor (1)
- mass spectrometry (1)
- medial prefrontal cortex (mPFC) (1)
- membranous urethra (1)
- memory consolidation and extinction (1)
- microdosing (1)
- mid-term urinary continence (1)
- molecular dynamics simulation (1)
- multidrug resistance (1)
- neoadjuvant therapy (1)
- neutralizing antibodies (1)
- organ preservation (1)
- organic charge-transfer salts (1)
- papilloma (1)
- percolation (1)
- primary aldosteronism (1)
- primary biliary cholangitis (1)
- primary immunodeficiency (PID) (1)
- primärer Hyperaldosteronismus (1)
- prostate cancer (1)
- proteomics (1)
- pseudoexfoliative syndrome (1)
- radical prostatectomy (1)
- re-irradiation (1)
- registry for primary immunodeficiency (1)
- rituximab (1)
- screening routine (1)
- second line therapy (1)
- spectra (1)
- spike protein (1)
- surgery (1)
- tetrahydroaldosterone (1)
- traffic accident (1)
- transcranial magnetic stimulation (TMS) (1)
- transportation (1)
- trastuzumab (1)
- traumatic brain injury (1)
- treatment response (1)
- ursodeoxycholic acid (1)
- variants of concern (1)
- western blotting (1)
- √sN N = 2.76 TeV (1)
- 创伤后应激障碍 (1)
- 治疗依从性 (1)
- 治疗完整性 (1)
- 辩证行为疗法 (1)
Institute
- Physik (83)
- Medizin (72)
- Frankfurt Institute for Advanced Studies (FIAS) (69)
- Informatik (68)
- Geowissenschaften (7)
- Biowissenschaften (5)
- Biochemie und Chemie (4)
- Psychologie (3)
- Senckenbergische Naturforschende Gesellschaft (3)
- ELEMENTS (2)
Introduction: The German PID-NET registry was founded in 2009, serving as the first national registry of patients with primary immunodeficiencies (PID) in Germany. It is part of the European Society for Immunodeficiencies (ESID) registry. The primary purpose of the registry is to gather data on the epidemiology, diagnostic delay, diagnosis, and treatment of PIDs.
Methods: Clinical and laboratory data was collected from 2,453 patients from 36 German PID centres in an online registry. Data was analysed with the software Stata® and Excel.
Results: The minimum prevalence of PID in Germany is 2.72 per 100,000 inhabitants. Among patients aged 1–25, there was a clear predominance of males. The median age of living patients ranged between 7 and 40 years, depending on the respective PID. Predominantly antibody disorders were the most prevalent group with 57% of all 2,453 PID patients (including 728 CVID patients). A gene defect was identified in 36% of patients. Familial cases were observed in 21% of patients. The age of onset for presenting symptoms ranged from birth to late adulthood (range 0–88 years). Presenting symptoms comprised infections (74%) and immune dysregulation (22%). Ninety-three patients were diagnosed without prior clinical symptoms. Regarding the general and clinical diagnostic delay, no PID had undergone a slight decrease within the last decade. However, both, SCID and hyper IgE- syndrome showed a substantial improvement in shortening the time between onset of symptoms and genetic diagnosis. Regarding treatment, 49% of all patients received immunoglobulin G (IgG) substitution (70%—subcutaneous; 29%—intravenous; 1%—unknown). Three-hundred patients underwent at least one hematopoietic stem cell transplantation (HSCT). Five patients had gene therapy.
Conclusion: The German PID-NET registry is a precious tool for physicians, researchers, the pharmaceutical industry, politicians, and ultimately the patients, for whom the outcomes will eventually lead to a more timely diagnosis and better treatment.
Plants, fungi and algae are important components of global biodiversity and are fundamental to all ecosystems. They are the basis for human well-being, providing food, materials and medicines. Specimens of all three groups of organisms are accommodated in herbaria, where they are commonly referred to as botanical specimens.The large number of specimens in herbaria provides an ample, permanent and continuously improving knowledge base on these organisms and an indispensable source for the analysis of the distribution of species in space and time critical for current and future research relating to global biodiversity. In order to make full use of this resource, a research infrastructure has to be built that grants comprehensive and free access to the information in herbaria and botanical collections in general. This can be achieved through digitization of the botanical objects and associated data.The botanical research community can count on a long-standing tradition of collaboration among institutions and individuals. It agreed on data standards and standard services even before the advent of computerization and information networking, an example being the Index Herbariorum as a global registry of herbaria helping towards the unique identification of specimens cited in the literature.In the spirit of this collaborative history, 51 representatives from 30 institutions advocate to start the digitization of botanical collections with the overall wall-to-wall digitization of the flat objects stored in German herbaria. Germany has 70 herbaria holding almost 23 million specimens according to a national survey carried out in 2019. 87% of these specimens are not yet digitized. Experiences from other countries like France, the Netherlands, Finland, the US and Australia show that herbaria can be comprehensively and cost-efficiently digitized in a relatively short time due to established workflows and protocols for the high-throughput digitization of flat objects.Most of the herbaria are part of a university (34), fewer belong to municipal museums (10) or state museums (8), six herbaria belong to institutions also supported by federal funds such as Leibniz institutes, and four belong to non-governmental organizations. A common data infrastructure must therefore integrate different kinds of institutions.Making full use of the data gained by digitization requires the set-up of a digital infrastructure for storage, archiving, content indexing and networking as well as standardized access for the scientific use of digital objects. A standards-based portfolio of technical components has already been developed and successfully tested by the Biodiversity Informatics Community over the last two decades, comprising among others access protocols, collection databases, portals, tools for semantic enrichment and annotation, international networking, storage and archiving in accordance with international standards. This was achieved through the funding by national and international programs and initiatives, which also paved the road for the German contribution to the Global Biodiversity Information Facility (GBIF).Herbaria constitute a large part of the German botanical collections that also comprise living collections in botanical gardens and seed banks, DNA- and tissue samples, specimens preserved in fluids or on microscope slides and more. Once the herbaria are digitized, these resources can be integrated, adding to the value of the overall research infrastructure. The community has agreed on tasks that are shared between the herbaria, as the German GBIF model already successfully demonstrates.We have compiled nine scientific use cases of immediate societal relevance for an integrated infrastructure of botanical collections. They address accelerated biodiversity discovery and research, biomonitoring and conservation planning, biodiversity modelling, the generation of trait information, automated image recognition by artificial intelligence, automated pathogen detection, contextualization by interlinking objects, enabling provenance research, as well as education, outreach and citizen science.We propose to start this initiative now in order to valorize German botanical collections as a vital part of a worldwide biodiversity data pool.
Aim: In the CheckRad-CD8 trial patients with locally advanced head and neck squamous cell cancer are treated with a single cycle of induction chemo-immunotherapy (ICIT). Patients with pathological complete response (pCR) in the re-biopsy enter radioimmunotherapy. Our goal was to study the value of F-18-FDG PET/CT in the prediction of pCR after induction therapy.
Methods: Patients treated within the CheckRad-CD8 trial that additionally received FDG- PET/CT imaging at the following two time points were included: 3–14 days before (pre-ICIT) and 21–28 days after (post-ICIT) receiving ICIT. Tracer uptake in primary tumors (PT) and suspicious cervical lymph nodes (LN +) was measured using different quantitative parameters on EANM Research Ltd (EARL) accredited PET reconstructions. In addition, mean FDG uptake levels in lymphatic and hematopoietic organs were examined. Percent decrease (Δ) in FDG uptake was calculated for all parameters. Biopsy of the PT post-ICIT acquired after FDG-PET/CT served as reference. The cohort was divided in patients with pCR and residual tumor (ReTu).
Results: Thirty-one patients were included. In ROC analysis, ΔSUVmax PT performed best (AUC = 0.89) in predicting pCR (n = 17), with a decline of at least 60% (sensitivity, 0.77; specificity, 0.93). Residual SUVmax PT post-ICIT performed best in predicting ReTu (n = 14), at a cutpoint of 6.0 (AUC = 0.91; sensitivity, 0.86; specificity, 0.88). Combining two quantitative parameters (ΔSUVmax ≥ 50% and SUVmax PT post-ICIT ≤ 6.0) conferred a sensitivity of 0.81 and a specificity of 0.93 for determining pCR. Background activity in lymphatic organs or uptake in suspected cervical lymph node metastases lacked significant predictive value.
Conclusion: FDG-PET/CT can identify patients with pCR after ICIT via residual FDG uptake levels in primary tumors and the related changes compared to baseline. FDG-uptake in LN + had no predictive value.
Trial registry: ClinicalTrials.gov identifier: NCT03426657.
The transverse momentum (pT) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0–10% and 10–30% central Pb–Pb collisions at √sNN = 2.76 TeV were measured. Jets were reconstructed using the anti-kT jet algorithm with a resolution parameter of R = 0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet pT spectra are reported in the pseudorapidity interval of |ηjet| < 0.5 for 40 < pT, jet < 120 GeV/c in 0–10% and for 30 < pT, jet < 100 GeV/c in 10–30% collisions. Reconstructed jets were required to contain a leading charged particle with pT > 5 GeV/c to suppress jets constructed from the combinatorial background in Pb–Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb–Pb collisions had a negligible effect on the RAA. The nuclear modification factor RAA was found to be 0.28 ± 0.04 in 0–10% and 0.35 ± 0.04 in 10–30% collisions, independent of pT, jet within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching.
We have performed the first measurement of the coherent ψ(2S) photo production cross section in ultraperipheral Pb–Pb collisions at the LHC. This charmonium excited state is reconstructed via the ψ(2S) → l +l − and ψ(2S) → J/ψπ+π− decays, where the J/ψ decays into two leptons. The analysis is based on an event sample corresponding to an integrated luminosity of about 22 μb−1. The cross section for coherent ψ(2S) production in the rapidity interval −0.9 < y < 0.9 is dσcoh ψ(2S)/dy = 0.83±0.19 stat+syst mb. The ψ(2S) to J/ψ coherent cross section ratio is 0.34+0.08 −0.07(stat + syst). The obtained results are compared to predictions from theoretical models.
A measurement of dijet correlations in p–Pb collisions at √sNN = 5.02 TeV with the ALICE detector is presented. Jets are reconstructed from charged particles measured in the central tracking detectors and neutral energy deposited in the electromagnetic calorimeter. The transverse momentum of the full jet (clustered from charged and neutral constituents) and charged jet (clustered from charged particles only) is corrected event-by-event for the contribution of the underlying event, while corrections for underlying event fluctuations and finite detector resolution are applied on an inclusive basis. A projection of the dijet transverse momentum, kTy = pch+ne T,jet sin(ϕdijet) with ϕdijet the azimuthal angle between a full and charged jet and pch+ne T,jet the transverse momentum of the full jet, is used to study nuclear matter effects in p–Pb collisions. This observable is sensitive to the acoplanarity of dijet production and its potential modification in p–Pb collisions with respect to pp collisions. Measurements of the dijet kTy as a function of the transverse momentum of the full and recoil charged jet, and the event multiplicity are presented. No significant modification of kTy due to nuclear matter effects in p–Pb collisions with respect to the event multiplicity or a PYTHIA8 reference is observed.
The measurement of the mass differences for systems bound by the strong force has reached a very high precision with protons and anti-protons1,2. The extension of such measurement from (anti-)baryons to (anti-)nuclei allows one to probe any difference in the interactions between nucleons and anti-nucleons encoded in the (anti-)nuclei masses. This force is a remnant of the underlying strong interaction among quarks and gluons and can be described by effective theories3, but cannot yet be directly derived from quantum chromodynamics. Here we report a measurement of the difference between the ratios of the mass and charge of deuterons (d) and anti-deuterons (), and 3He and nuclei carried out with the ALICE (A Large Ion Collider Experiment)4 detector in Pb–Pb collisions at a centre-of-mass energy per nucleon pair of 2.76 TeV. Our direct measurement of the mass-over-charge differences confirms CPT invariance to an unprecedented precision in the sector of light nuclei5,6. This fundamental symmetry of nature, which exchanges particles with anti-particles, implies that all physics laws are the same under the simultaneous reversal of charge(s) (charge conjugation C), reflection of spatial coordinates (parity transformation P) and time inversion (T).
The first measurement of two-pion Bose–Einstein correlations in central Pb–Pb collisions at √sNN=2.76 TeV at the Large Hadron Collider is presented. We observe a growing trend with energy now not only for the longitudinal and the outward but also for the sideward pion source radius. The pion homogeneity volume and the decoupling time are significantly larger than those measured at RHIC.
Inclusive transverse momentum spectra of primary charged particles in Pb–Pb collisions at √sNN=2.76 TeV have been measured by the ALICE Collaboration at the LHC. The data are presented for central and peripheral collisions, corresponding to 0–5% and 70–80% of the hadronic Pb–Pb cross section. The measured charged particle spectra in |η|<0.8 and 0.3<pT<20 GeV/c are compared to the expectation in pp collisions at the same sNN, scaled by the number of underlying nucleon–nucleon collisions. The comparison is expressed in terms of the nuclear modification factor RAA. The result indicates only weak medium effects (RAA≈0.7) in peripheral collisions. In central collisions, RAA reaches a minimum of about 0.14 at pT=6–7 GeV/c and increases significantly at larger pT. The measured suppression of high-pT particles is stronger than that observed at lower collision energies, indicating that a very dense medium is formed in central Pb–Pb collisions at the LHC.
Rapidity and transverse momentum dependence of inclusive J/ψ production in pp collisions at √s=7 TeV
(2011)
The ALICE experiment at the LHC has studied inclusive J/ψ production at central and forward rapidities in pp collisions at √s=7 TeV. In this Letter, we report on the first results obtained detecting the J/ψ through the dilepton decay into e+e− and μ+μ− pairs in the rapidity ranges |y|<0.9 and 2.5<y<4, respectively, and with acceptance down to zero pT. In the dielectron channel the analysis was carried out on a data sample corresponding to an integrated luminosity Lint=5.6 nb−1 and the number of signal events is NJ/ψ=352±32(stat.)±28(syst.); the corresponding figures in the dimuon channel are Lint=15.6 nb−1 and NJ/ψ=1924±77(stat.)±144(syst.). The measured production cross sections are σJ/ψ(|y|<0.9)=10.7±1.0(stat.)±1.6(syst.)−2.3+1.6(syst.pol.)μb and σJ/ψ(2.5<y<4)=6.31±0.25(stat.)±0.76(syst.)−1.96+0.95(syst.pol.)μb. The differential cross sections, in transverse momentum and rapidity, of the J/ψ were also measured.
We report the first measurement at the LHC of coherent photoproduction of ρ0 mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for ρ0 production are studied in the π+π− decay channel at mid-rapidity. The production cross section in the rapidity range |y|<0.5 is found to be dσ/dy=425±10(stat.) +42−50(sys.) mb. Coherent ρ0 production is studied with and without requirement of nuclear breakup, and the fractional yields for various breakup scenarios are presented. The results are compared with those from lower energies and with model predictions.
We report the first measurement at the LHC of coherent photoproduction of ρ0 mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for ρ0 production are studied in the π+π− decay channel at mid-rapidity. The production cross section in the rapidity range |y|<0.5 is found to be dσ/dy=425±10(stat.) +42−50(sys.) mb. Coherent ρ0 production is studied with and without requirement of nuclear breakup, and the fractional yields for various breakup scenarios are presented. The results are compared with those from lower energies and with model predictions based on the Glauber model and the color dipole model. The measured cross section is found to be inconsistent with a scaling of the γ-nucleon cross section using the Glauber model.
Prompt D meson and non-prompt J/ψ yields are studied as a function of the multiplicity of charged particles produced in inelastic proton-proton collisions at a centre-of-mass energy of s√=7 TeV. The results are reported as a ratio between yields in a given multiplicity interval normalised to the multiplicity-integrated ones (relative yields). They are shown as a function of the multiplicity of charged particles normalised to the average value for inelastic collisions (relative charged-particle multiplicity). D0, D+ and D∗+ mesons are measured in five pT intervals from 1 to 20 GeV/c and for |y|<0.5 via their hadronic decays. The D-meson relative yield is found to increase with increasing charged-particle multiplicity. For events with multiplicity six times higher than the average multiplicity of inelastic collisions, a yield enhancement of a factor about 15 relative to the multiplicity-integrated yield in inelastic collisions is observed. The yield enhancement is independent of transverse momentum within the uncertainties of the measurement. The D0-meson relative yield is also measured as a function of the relative multiplicity at forward pseudorapidity. The non-prompt J/ψ, i.e. the B hadron, contribution to the inclusive J/ψ production is measured in the di-electron decay channel at central rapidity. It is evaluated for pT>1.3 GeV/c and |y|<0.9, and extrapolated to pT>0. The fraction of non-prompt J/ψ in the inclusive J/ψ yields shows no dependence on the charged-particle multiplicity at central rapidity. Charm and beauty hadron relative yields exhibit a similar increase with increasing charged-particle multiplicity. The measurements are compared to PYTHIA 8, EPOS 3 and percolation calculations.
Prompt D meson and non-prompt J/ yields are studied as a function of the multiplicity of charged particles produced in inelastic proton-proton collisions at a centre-of-mass energy of TeV. The results are reported as a ratio between yields in a given multiplicity interval normalised to the multiplicity-integrated ones (relative yields). They are shown as a function of the multiplicity of charged particles normalised to the average value for inelastic collisions (relative charged-particle multiplicity). D, D and D mesons are measured in five intervals from 1 to 20 GeV/ and for via their hadronic decays. The D-meson relative yield is found to increase with increasing charged-particle multiplicity. For events with multiplicity six times higher than the average multiplicity of inelastic collisions, a yield enhancement of a factor about 15 relative to the multiplicity-integrated yield in inelastic collisions is observed. The yield enhancement is independent of transverse momentum within the uncertainties of the measurement. The D-meson relative yield is also measured as a function of the relative multiplicity at forward pseudorapidity. The non-prompt J/, i.e. the B hadron, contribution to the inclusive J/ production is measured in the di-electron decay channel at central rapidity. It is evaluated for GeV/ and , and extrapolated to . The fraction of non-prompt J/ in the inclusive J/ yields shows no dependence on the charged-particle multiplicity at central rapidity. Charm and beauty hadron relative yields exhibit a similar increase with increasing charged-particle multiplicity. The measurements are compared to PYTHIA 8, EPOS 3 and percolation calculations.
Prompt D meson and non-prompt J/ψ yields are studied as a function of the multiplicity of charged particles produced in inelastic proton-proton collisions at a centre-of-mass energy of s√=7 TeV. The results are reported as a ratio between yields in a given multiplicity interval normalised to the multiplicity-integrated ones (relative yields). They are shown as a function of the multiplicity of charged particles normalised to the average value for inelastic collisions (relative charged-particle multiplicity). D0, D+ and D∗+ mesons are measured in five pT intervals from 1 to 20 GeV/c and for |y|<0.5 via their hadronic decays. The D-meson relative yield is found to increase with increasing charged-particle multiplicity. For events with multiplicity six times higher than the average multiplicity of inelastic collisions, a yield enhancement of a factor about 15 relative to the multiplicity-integrated yield in inelastic collisions is observed. The yield enhancement is independent of transverse momentum within the uncertainties of the measurement. The D0-meson relative yield is also measured as a function of the relative multiplicity at forward pseudorapidity. The non-prompt J/ψ, i.e. the B hadron, contribution to the inclusive J/ψ production is measured in the di-electron decay channel at central rapidity. It is evaluated for pT>1.3 GeV/c and |y|<0.9, and extrapolated to pT>0. The fraction of non-prompt J/ψ in the inclusive J/ψ yields shows no dependence on the charged-particle multiplicity at central rapidity. Charm and beauty hadron relative yields exhibit a similar increase with increasing charged-particle multiplicity. The measurements are compared to PYTHIA 8, EPOS 3 and percolation calculations.
The measurement of the mass differences for systems bound by the strong force has reached a very high precision with protons and anti-protons. The extension of such measurement from (anti-)baryons to (anti-)nuclei allows one to probe any difference in the interactions between nucleons and anti-nucleons encoded in the (anti-)nuclei masses. This force is a remnant of the underlying strong interaction among quarks and gluons and can be described by effective theories, but cannot yet be directly derived from quantum chromodynamics. Here we report a measurement of the difference between the ratios of the mass and charge of deuterons and anti-deuterons, and 3He and 3He¯¯¯¯¯¯ nuclei carried out with the ALICE (A Large Ion Collider Experiment) detector in Pb-Pb collisions at a centre-of-mass energy per nucleon pair of 2.76 TeV. Our direct measurement of the mass-over-charge differences confirm CPT invariance to an unprecedented precision in the sector of light nuclei. This fundamental symmetry of nature, which exchanges particles with anti-particles, implies that all physics laws are the same under the simultaneous reversal of charge(s) (charge conjugation C), reflection of spatial coordinates (parity transformation P) and time inversion (T).
The strength of forward-backward (FB) multiplicity correlations is measured by the ALICE detector in proton-proton (pp) collisions at s√=0.9, 2.76 and 7 TeV. The measurement is performed in the central pseudorapidity region (|η|<0.8) for the transverse momentum pT>0.3 GeV/c. Two separate pseudorapidity windows of width (δη) ranging from 0.2 to 0.8 are chosen symmetrically around η=0. The multiplicity correlation strength (bcor) is studied as a function of the pseudorapidity gap (ηgap) between the two windows as well as the width of these windows. The correlation strength is found to decrease with increasing ηgap and shows a non-linear increase with δη. A sizable increase of the correlation strength with the collision energy, which cannot be explained exclusively by the increase of the mean multiplicity inside the windows, is observed. The correlation coefficient is also measured for multiplicities in different configurations of two azimuthal sectors selected within the symmetric FB η-windows. Two different contributions, the short-range (SR) and the long-range (LR), are observed. The energy dependence of bcor is found to be weak for the SR component while it is strong for the LR component. Moreover, the correlation coefficient is studied for particles belonging to various transverse momentum intervals chosen to have the same mean multiplicity. Both SR and LR contributions to bcor are found to increase with pT in this case. Results are compared to PYTHIA and PHOJET event generators and to a string-based phenomenological model. The observed dependencies of bcor add new constraints on phenomenological models.
The strength of forward-backward (FB) multiplicity correlations is measured by the ALICE detector in proton-proton (pp) collisions at s√=0.9, 2.76 and 7 TeV. The measurement is performed in the central pseudorapidity region (|η|<0.8) for the transverse momentum pT>0.3 GeV/c. Two separate pseudorapidity windows of width (δη) ranging from 0.2 to 0.8 are chosen symmetrically around η=0. The multiplicity correlation strength (bcor) is studied as a function of the pseudorapidity gap (ηgap) between the two windows as well as the width of these windows. The correlation strength is found to decrease with increasing ηgap and shows a non-linear increase with δη. A sizable increase of the correlation strength with the collision energy, which cannot be explained exclusively by the increase of the mean multiplicity inside the windows, is observed. The correlation coefficient is also measured for multiplicities in different configurations of two azimuthal sectors selected within the symmetric FB η-windows. Two different contributions, the short-range (SR) and the long-range (LR), are observed. The energy dependence of bcor is found to be weak for the SR component while it is strong for the LR component. Moreover, the correlation coefficient is studied for particles belonging to various transverse momentum intervals chosen to have the same mean multiplicity. Both SR and LR contributions to bcor are found to increase with pT in this case. Results are compared to PYTHIA and PHOJET event generators and to a string-based phenomenological model. The observed dependencies of bcor add new constraints on phenomenological models.
The strength of forward-backward (FB) multiplicity correlations is measured by the ALICE detector in proton-proton (pp) collisions at s√=0.9, 2.76 and 7 TeV. The measurement is performed in the central pseudorapidity region (|η|<0.8) for the transverse momentum pT>0.3 GeV/c. Two separate pseudorapidity windows of width (δη) ranging from 0.2 to 0.8 are chosen symmetrically around η=0. The multiplicity correlation strength (bcor) is studied as a function of the pseudorapidity gap (ηgap) between the two windows as well as the width of these windows. The correlation strength is found to decrease with increasing ηgap and shows a non-linear increase with δη. A sizable increase of the correlation strength with the collision energy, which cannot be explained exclusively by the increase of the mean multiplicity inside the windows, is observed. The correlation coefficient is also measured for multiplicities in different configurations of two azimuthal sectors selected within the symmetric FB η-windows. Two different contributions, the short-range (SR) and the long-range (LR), are observed. The energy dependence of bcor is found to be weak for the SR component while it is strong for the LR component. Moreover, the correlation coefficient is studied for particles belonging to various transverse momentum intervals chosen to have the same mean multiplicity. Both SR and LR contributions to bcor are found to increase with pT in this case. Results are compared to PYTHIA and PHOJET event generators and to a string-based phenomenological model. The observed dependencies of bcor add new constraints on phenomenological models.
We report the results of the femtoscopic analysis of pairs of identical pions measured in p-Pb collisions at sNN−−−√=5.02 TeV. Femtoscopic radii are determined as a function of event multiplicity and pair momentum in three spatial dimensions. As in the pp collision system, the analysis is complicated by the presence of sizable background correlation structures in addition to the femtoscopic signal. The radii increase with event multiplicity and decrease with pair transverse momentum. When taken at comparable multiplicity, the radii measured in p-Pb collisions, at high multiplicity and low pair transverse momentum, are 10-20% higher than those observed in pp collisions but below those observed in A-A collisions. The results are compared to hydrodynamic predictions at large event multiplicity as well as discussed in the context of calculations based on gluon saturation.