Refine
Year of publication
Document Type
- Article (58)
- Preprint (35)
- Conference Proceeding (2)
Language
- English (95)
Has Fulltext
- yes (95)
Is part of the Bibliography
- no (95)
Keywords
- LHC (7)
- ALICE (3)
- ALICE experiment (3)
- Hadron-Hadron Scattering (3)
- pp collisions (3)
- Atmospheric science (2)
- Beauty production (2)
- Climate change (2)
- Single electrons (2)
- 900 GeV (1)
- Anandamide (1)
- Atmospheric chemistry (1)
- BCL2 (1)
- CCL2 (1)
- COVID (1)
- COVID-19 (1)
- Charm physics (1)
- Comparison with QCD (1)
- Completed suicide (1)
- DNA damage (1)
- E. coli (1)
- EP300 (1)
- EWSR1 (1)
- FOXO1 (1)
- Femtoscopy (1)
- Gene fusion (1)
- HBT (1)
- HDAC4 (1)
- Hadron production (1)
- Heavy Ions (1)
- Heavy flavor production (1)
- Heavy flavour production (1)
- Heavy ions (1)
- Heavy-flavour production (1)
- Heavy-ion collisions (1)
- HepG2 (1)
- Huh7 (1)
- Inclusive spectra (1)
- Inflammation (1)
- Intensity interferometry (1)
- Jets (1)
- MYC (1)
- Mid-rapidity (1)
- Multi-strange baryons (1)
- NASH (1)
- NCoR1 (1)
- NEAT1 (1)
- NR4A2 (1)
- Neuroepithelial tumor (1)
- Nuclear modification factor (1)
- PLAGL1 (1)
- PYTHIA (1)
- Pandemic (1)
- Pb–Pb (1)
- Proton–proton (1)
- Red blood cell transfusion (1)
- Relativistic heavy ion physics (1)
- SARS-CoV2 (1)
- Single muons (1)
- Suicide attempt (1)
- Supratentorial (1)
- Transverse momentum (1)
- VEGFA (1)
- accident (1)
- anaemia (1)
- biophysics (1)
- cell biology (1)
- chemoresistance (1)
- elderly patients (1)
- flow cytometry (1)
- injury (1)
- kinetically trapped state (1)
- liver cancer (1)
- lockdown (1)
- mouse (1)
- neurodegeneration (1)
- nuclear receptor-related 1 (1)
- oocytes (1)
- p63 (1)
- pediatric intensive care (1)
- pharmacophore model (1)
- quality control (1)
- spectra (1)
- spring-loaded activation (1)
- structural biolog (1)
- surgery (1)
- transcription factor (1)
- trauma (1)
- √sN N = 2.76 TeV (1)
Institute
The ALICE Collaboration has made the first measurement at the LHC of J/ψ photoproduction in ultra-peripheral Pb–Pb collisions at sNN=2.76 TeV. The J/ψ is identified via its dimuon decay in the forward rapidity region with the muon spectrometer for events where the hadronic activity is required to be minimal. The analysis is based on an event sample corresponding to an integrated luminosity of about 55 μb−1. The cross section for coherent J/ψ production in the rapidity interval −3.6<y<−2.6 is measured to be dσJ/ψcoh/dy=1.00±0.18(stat)−0.26+0.24(syst) mb. The result is compared to theoretical models for coherent J/ψ production and found to be in good agreement with those models which include nuclear gluon shadowing.
We have has performed the first measurement of the coherent ψ(2S) photo-production cross section in ultra-peripheral 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 dσcohψ(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.
We have has performed the first measurement of the coherent ψ(2S) photo-production cross section in ultra-peripheral 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 dσcohψ(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.
Ependymomas encompass a heterogeneous group of central nervous system (CNS) neoplasms that occur along the entire neuroaxis. In recent years, extensive (epi-)genomic profiling efforts have identified several molecular groups of ependymoma that are characterized by distinct molecular alterations and/or patterns. Based on unsupervised visualization of a large cohort of genome-wide DNA methylation data, we identified a highly distinct group of pediatric-type tumors (n = 40) forming a cluster separate from all established CNS tumor types, of which a high proportion were histopathologically diagnosed as ependymoma. RNA sequencing revealed recurrent fusions involving the pleomorphic adenoma gene-like 1 (PLAGL1) gene in 19 of 20 of the samples analyzed, with the most common fusion being EWSR1:PLAGL1 (n = 13). Five tumors showed a PLAGL1:FOXO1 fusion and one a PLAGL1:EP300 fusion. High transcript levels of PLAGL1 were noted in these tumors, with concurrent overexpression of the imprinted genes H19 and IGF2, which are regulated by PLAGL1. Histopathological review of cases with sufficient material (n = 16) demonstrated a broad morphological spectrum of tumors with predominant ependymoma-like features. Immunohistochemically, tumors were GFAP positive and OLIG2- and SOX10 negative. In 3/16 of the cases, a dot-like positivity for EMA was detected. All tumors in our series were located in the supratentorial compartment. Median age of the patients at the time of diagnosis was 6.2 years. Median progression-free survival was 35 months (for 11 patients with data available). In summary, our findings suggest the existence of a novel group of supratentorial neuroepithelial tumors that are characterized by recurrent PLAGL1 fusions and enriched for pediatric patients.
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).