Refine
Year of publication
Document Type
- Article (203)
- Preprint (38)
- Contribution to a Periodical (4)
Has Fulltext
- yes (245)
Is part of the Bibliography
- no (245)
Keywords
- SARS-CoV-2 (10)
- COVID-19 (5)
- Solution NMR-spectroscopy (4)
- COVID19-NMR (3)
- Covid19-NMR (3)
- Non-structural protein (3)
- risk factors (3)
- ACLF (2)
- Biomarkers (2)
- Collectivity (2)
- Correlation (2)
- Diffraction (2)
- Elastic scattering (2)
- Immunology (2)
- Mitochondria (2)
- Non-small cell lung cancer (2)
- Portal hypertension (2)
- Protein drugability (2)
- Shear viscosity (2)
- Solution NMR spectroscopy (2)
- acute myeloid leukemia (2)
- acute-on-chronic liver failure (2)
- aging (2)
- cirrhosis (2)
- inflammation (2)
- portal hypertension (2)
- (Hydroxymethyl)diphenyl(piperidinoalkyl)silanes (1)
- 32D progenitor cells (1)
- 3years (1)
- 5'-UTR (1)
- 5_SL4 (1)
- 5′-UTR (1)
- ABCB1 (1)
- ABCC1 (1)
- ADGRE1 (1)
- ALK-rearranged NSCLC (1)
- AML (1)
- Acute Myeloid Leukemia (AML) (1)
- Acute kidney injury (1)
- Advanced stage (1)
- Alpha-synuclein (1)
- Alternative oxidase (1)
- American crocodile (1)
- Angiogenesis (1)
- Angiography (1)
- Ankylosierende Spondylitis (1)
- Ankylosing spondylitis (1)
- Artificial Intelligence (1)
- Atmospheric chemistry (1)
- Axial spondyloarthritis (1)
- Axiale Spondyloarthritis (1)
- B-slope (1)
- BCOR (1)
- BCORL1 (1)
- BI1361849 (1)
- BRVO (1)
- Biodiversity Data (1)
- Biomonitoring (1)
- Blood (1)
- Blood loss (1)
- Blood plasma (1)
- Botanical Collections (1)
- Brain tumor (1)
- CAKUT (1)
- CBA (1)
- CLIF-C ACLF score (1)
- CLIF-C ACLF-R score (1)
- COPD (1)
- COVID (1)
- CV9202 (1)
- CVD biomarker (1)
- Cancer (1)
- Cardiology (1)
- Care gaps (1)
- Charged-particle multiplicity (1)
- Charm quark spatial diffusion coefficient (1)
- Cirrhosis (1)
- Climate sciences (1)
- Climate-change impacts (1)
- Clinical trial (1)
- Coalescence (1)
- Cohort studies (1)
- Cold nuclear matter effects (1)
- Colloids (1)
- Complex II (1)
- Complicated stage (1)
- Conservation (1)
- Critical point (1)
- Crocodylus acutus (1)
- Cryptic species (1)
- DME (1)
- Data sharing (1)
- Deuteron production (1)
- Devic disease (1)
- Devic syndrome (1)
- Di-hadron correlations (1)
- Diabetes (1)
- Digitization (1)
- Dimerization domain (1)
- Drug resistance (1)
- Drug targets (1)
- EMR1 (1)
- EWSR1 (1)
- Elliptic flow (1)
- Emphysema (1)
- Everolimus (1)
- Extended donor criteria (1)
- F4/80 (1)
- FOXO3a (1)
- G3BP (1)
- Gene fusion (1)
- Genetic testing (1)
- Genetics (1)
- Germany (1)
- Graft function (1)
- Graft survival (1)
- Groomed jet radius (1)
- HES (1)
- Hadronization (1)
- Haematocrit (1)
- Hashimoto’s thyroiditis (1)
- Health care (1)
- Health information (1)
- Health-seeking behaviour (1)
- Heat shock protein 27 (1)
- Heavy Ion Experiments (1)
- Heavy Quark Production (1)
- Heavy ion collisions (1)
- Heavy-Ion Collision (1)
- Heavy-flavor decay electron (1)
- Heavy-ion collisions (1)
- Helpline (1)
- Herbaria (1)
- Higher moments (1)
- Hydroxyethyl starch (1)
- Hypofractionated radiotherapy (1)
- IL-6 (1)
- ILUVIEN (1)
- Immunogenetics (1)
- Immunomonitoring (1)
- Interference fragmentation function (1)
- J/ψ suppression (1)
- JAK2V617F (1)
- Jet substructure (1)
- K3EDTA plasma sampling (1)
- Kidney transplantation (1)
- LEOSS (1)
- Lipidomics (1)
- Liver cirrhosis (1)
- Liver transplantation (1)
- Ltbp4 (1)
- MCP (1)
- MN1 (1)
- MR-proADM (1)
- Machine learning (1)
- Macrodomain (1)
- Marginal grafts (1)
- Mean erythrocyte volume (1)
- Medication Appropriateness Index (1)
- Metabolic models (1)
- Metabolic vulnerabilities (1)
- Metabolomics (1)
- Mitochondrial disease (1)
- Molecular diagnostic testing (1)
- Molecular medicine (1)
- Mortality (1)
- Multiple parton interactions (1)
- Muscarinic Antagonists (1)
- Muscarinic Receptors (1)
- NAFL (1)
- NAFLD (1)
- NASH (1)
- NMO-IgG (1)
- NMR spectroscopy (1)
- Nephrons (1)
- Net-charge correlations (1)
- Net-charge fluctuations (1)
- Neuroepithelial (1)
- Neuromyelitis optica (1)
- Neurooncology (1)
- Nrf2 (1)
- Nucleic acid-binding domain (1)
- Nucleocapsid (1)
- Number of platelets (1)
- Ocean sciences (1)
- Oncology (1)
- Organ rinse (1)
- Organ shortage (1)
- Oxidative phosphorylation (1)
- PATZ1 (1)
- PTDM (1)
- Palaeoceanography (1)
- Palaeoclimate (1)
- Parkinson’s disease (1)
- Pdgfrβ (1)
- Pediatric (1)
- Periodontitis grades B and C (1)
- Phylogeny (1)
- Polo-like kinase 3 (1)
- Portal veins (1)
- Post-transplant (1)
- Pre-analytics (1)
- Predictive model (1)
- Primary prophylaxis (1)
- Protein druggability (1)
- Proteins (1)
- Proton-proton collisions (1)
- Proton–proton collisions (1)
- Psychiatric disorders (1)
- Quality of care (1)
- Quality standards (1)
- Qualitätsstandards (1)
- Quarkonium (1)
- RHIC (1)
- RNA genome (1)
- ROS (1)
- Radical nephrectomy (1)
- Rare diseases (1)
- Registries (1)
- Renal cancer (1)
- Renal system (1)
- Research Infrastructure (1)
- Respiratory chain (1)
- Retro-IDEAL (1)
- Rho GTPases (1)
- SD-OCT (1)
- SL1 (1)
- SLC20A1 (1)
- SOFA (1)
- SPSS (1)
- STK3 (1)
- Sampling protocol (1)
- Semantics (1)
- Sepsis (1)
- Septic shock (1)
- Sila-difenidol (1)
- Sila-pridinol (1)
- SoftDrop (1)
- Splitting function (1)
- Spontaneous bacterial peritonitis (1)
- Steroid (1)
- Structural protein (1)
- Surgical and invasive medical procedures (1)
- Surgical oncology (1)
- Survival analysis (1)
- TGR(mREN2)27 (1)
- TOR inhibitor (1)
- TP53 mutation status (1)
- Tacrolimus (1)
- Taxonomy (1)
- Telemedicine (1)
- Tgfβ (1)
- Thermal model (1)
- Transversity (1)
- Trauma (1)
- UCN-01 (1)
- VEGF (1)
- Versorgungslücken (1)
- Versorgungsqualität (1)
- Volume therapy (1)
- Western diet (1)
- White blood cells (1)
- YM155 (1)
- accessory proteins (1)
- accident (1)
- acute decompensation (1)
- acute-on-chronic liver failure (ACLF) (1)
- adhesion (1)
- advanced care planning (1)
- aftercare structures (1)
- ambulatory assessment (1)
- anal carcinoma (1)
- anticonvulsants (1)
- aquaporin-4 (AQP4) antibody (1)
- bioactivity testing (1)
- bladder exstrophy-epispadias complex (1)
- bleeding (1)
- cancer (1)
- caspase-8 (1)
- cell-free expression (1)
- cell-free protein synthesis (1)
- cerebrospinal fluid (1)
- chemoradiotherapy (1)
- chronic kidney disease (1)
- chronic myeloid leukemia (1)
- clinical features (1)
- cloacal malformation (1)
- comorbidities (1)
- computed tomography (1)
- computer-assisted drug therapy (1)
- consensus (1)
- context (1)
- critically ill patients (1)
- cytarabine dose (1)
- day clinic (1)
- decompensated liver cirrhosis (1)
- differentiated thyroid carcinoma (1)
- drug resistance (1)
- dysbiosis (1)
- easyPACId (1)
- ectosomes (1)
- elderly (1)
- epidemiology (1)
- epilepsy (1)
- epileptic encephalopathies (1)
- essential thrombocythemia (ET) (1)
- exosomes (1)
- experience sampling (1)
- extracellular vesicles (1)
- functional genetics (1)
- global change (1)
- glycobiology (1)
- glycoconjugate (1)
- guidelines (1)
- habitat destruction (1)
- health information exchange (1)
- hepatic encephalopathy (1)
- homing (1)
- hospital admission (1)
- immunity (1)
- infectious disease (1)
- injury (1)
- intrinsically disordered region (1)
- kidney formation (1)
- land use (1)
- lasso regression (1)
- lethal toxin (1)
- levetiracetam (1)
- liver (1)
- liver fibrosis (1)
- liver transplantation (1)
- liver transplantation center (1)
- local control (1)
- lockdown (1)
- long-term outcome (1)
- longitudinally extensive transverse myelitis (1)
- loss-of-function (1)
- mRNA active cancer immunotherapy (1)
- macrophage (1)
- magnetic resonance imaging (1)
- male (1)
- mechanical ventilation (1)
- medication reconciliation (1)
- metabolic reprogramming (1)
- metabolic syndromes (1)
- microbiome (1)
- microdosing (1)
- microparticles (1)
- microvesicles (1)
- migration (1)
- minimal information requirements (1)
- mitosis (1)
- molecular modeling (1)
- molecular switch (1)
- monocyte chemotactic protein 1 (MCP-1) (1)
- mortality (1)
- mtDNA (1)
- multimodal complex treatment (1)
- multimorbidity (1)
- multiple chronic conditions (1)
- myeloproliferative neoplasms (MPN) (1)
- nanodiscs (1)
- natural products (1)
- networks (1)
- neuroblastoma (1)
- neurodegeneration (1)
- neurological manifestations (1)
- neutralizing antibodies (1)
- nomogram (1)
- nonstructural proteins (1)
- p+p collisions (1)
- pediatric intensive care (1)
- peptide antibiotics (1)
- peri-implantitis (1)
- personalized medicine (1)
- phage lysis proteins (1)
- polycythemia vera (PV) (1)
- polypharmacy (1)
- portosystemic shunt (1)
- post-liver transplantation management (1)
- primary myelofibrosis (PMF) (1)
- proteobacteria (1)
- proteomics (1)
- pulmonary failure (1)
- qualitative research (1)
- quality control (1)
- rare diseases (1)
- real-life study (1)
- recurrent optic neuritis (1)
- renal dysfunction (1)
- reproducibility (1)
- respiratory failure (1)
- retrovirus (1)
- rigor (1)
- risk factor progression (1)
- risk stratification (1)
- seizure (1)
- sequential ALK-inhibitor therapy (1)
- sialic acid (1)
- simplified production (1)
- sirtuin1 (1)
- situation (1)
- spike protein (1)
- spontaneous portosystemic shunt (1)
- standardization (1)
- structural proteins (1)
- survival (1)
- survivin (1)
- thromboembolism (1)
- thrombosis (1)
- toxin B (1)
- transjugular intrahepatic portosystemic shunt (TIPS) (1)
- trauma (1)
- tyrosine kinase inhibitors. (1)
- urinary tract development (1)
- variants of concern (1)
- vitamin D (1)
- vitamin D receptor (1)
- vitreous samples (1)
- zebrafish development (1)
Institute
In relativistic heavy-ion collisions, a global spin polarization, PH, of Λ and Λ¯ hyperons along the direction of the system angular momentum was discovered and measured across a broad range of collision energies and demonstrated a trend of increasing PH with decreasing sNN−−−√. A splitting between Λ and Λ¯ polarization may be possible due to their different magnetic moments in a late-stage magnetic field sustained by the quark-gluon plasma which is formed in the collision. The results presented in this study find no significant splitting at the collision energies of sNN−−−√=19.6 and 27 GeV in the RHIC Beam Energy Scan Phase II using the STAR detector, with an upper limit of PΛ¯−PΛ<0.24% and PΛ¯−PΛ<0.35%, respectively, at a 95% confidence level. We derive an upper limit on the naïve extraction of the late-stage magnetic field of B<9.4⋅1012 T and B<1.4⋅1013 T at sNN−−−√=19.6 and 27 GeV, respectively, although more thorough derivations are needed. Differential measurements of PH were performed with respect to collision centrality, transverse momentum, and rapidity. With our current acceptance of |y|<1 and uncertainties, we observe no dependence on transverse momentum and rapidity in this analysis. These results challenge multiple existing model calculations following a variety of different assumptions which have each predicted a strong dependence on rapidity in this collision-energy range.
The transversity distribution, which describes transversely polarized quarks in transversely polarized nucleons, is a fundamental component of the spin structure of the nucleon, and is only loosely constrained by global fits to existing semi-inclusive deep inelastic scattering (SIDIS) data. In transversely polarized p↑+p collisions it can be accessed using transverse polarization dependent fragmentation functions which give rise to azimuthal correlations between the polarization of the struck parton and the final state scalar mesons.This letter reports on spin dependent di-hadron correlations measured by the STAR experiment. The new dataset corresponds to 25 pb−1 integrated luminosity of p↑+p collisions at s=500 GeV, an increase of more than a factor of ten compared to our previous measurement at s=200 GeV. Non-zero asymmetries sensitive to transversity are observed at a Q2 of several hundred GeV and are found to be consistent with the former measurement and a model calculation. We expect that these data will enable an extraction of transversity with comparable precision to current SIDIS datasets but at much higher momentum transfers where subleading effects are suppressed.
New measurements of directed flow for charged hadrons, characterized by the Fourier coefficient v1, are presented for transverse momenta pT, and centrality intervals in Au+Au collisions recorded by the STAR experiment for the center-of-mass energy range √sN N = 7.7–200 GeV. The measurements underscore the importance of momentum conservation, and the characteristic dependencies on √sN N , centrality and pT are consistent with the expectations of geometric fluctuations generated in the initial stages of the collision, acting in concert with a hydrodynamic-like expansion. The centrality and pT dependencies of veven 1 , as well as an observed similarity between its excitation function and that for v3, could serve as constraints for initial-state models. The veven 1 excitation function could also provide an important supplement to the flow measurements employed for precision extraction of the temperature dependence of the specific shear viscosity.
Elliptic flow of heavy-flavor decay electrons in Au+Au collisions at √sNN = 27 and 54.4 GeV at RHIC
(2023)
We report on new measurements of elliptic flow (v2) of electrons from heavy-flavor hadron decays at mid-rapidity (|y|<0.8) in Au+Au collisions at sNN−−−√ = 27 and 54.4 GeV from the STAR experiment. Heavy-flavor decay electrons (eHF) in Au+Au collisions at sNN−−−√ = 54.4 GeV exhibit a non-zero v2 in the transverse momentum (pT) region of pT< 2 GeV/c with the magnitude comparable to that at sNN−−−√=200 GeV. The measured eHF v2 at 54.4 GeV is also consistent with the expectation of their parent charm hadron v2 following number-of-constituent-quark scaling as other light and strange flavor hadrons at this energy. These suggest that charm quarks gain significant collectivity through the evolution of the QCD medium and may reach local thermal equilibrium in Au+Au collisions at sNN−−−√=54.4 GeV. The measured eHF v2 in Au+Au collisions at sNN−−−√= 27 GeV is consistent with zero within large uncertainties. The energy dependence of v2 for different flavor particles (π,ϕ,D0/eHF) shows an indication of quark mass hierarchy in reaching thermalization in high-energy nuclear collisions.
Elliptic flow of heavy-flavor decay electrons in Au+Au collisions at √sNN = 27 and 54.4 GeV at RHIC
(2023)
We report on new measurements of elliptic flow (v2) of electrons from heavy-flavor hadron decays at mid-rapidity (|y|<0.8) in Au+Au collisions at sNN−−−√ = 27 and 54.4 GeV from the STAR experiment. Heavy-flavor decay electrons (eHF) in Au+Au collisions at sNN−−−√ = 54.4 GeV exhibit a non-zero v2 in the transverse momentum (pT) region of pT< 2 GeV/c with the magnitude comparable to that at sNN−−−√=200 GeV. The measured eHF v2 at 54.4 GeV is also consistent with the expectation of their parent charm hadron v2 following number-of-constituent-quark scaling as other light and strange flavor hadrons at this energy. These suggest that charm quarks gain significant collectivity through the evolution of the QCD medium and may reach local thermal equilibrium in Au+Au collisions at sNN−−−√=54.4 GeV. The measured eHF v2 in Au+Au collisions at sNN−−−√= 27 GeV is consistent with zero within large uncertainties. The energy dependence of v2 for different flavor particles (π,ϕ,D0/eHF) shows an indication of quark mass hierarchy in reaching thermalization in high-energy nuclear collisions.
Density fluctuations near the QCD critical point can be probed via an intermittency analysis in relativistic heavy-ion collisions. We report the first measurement of intermittency in Au+Au collisions at sNN−−−√ = 7.7-200 GeV measured by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The scaled factorial moments of identified charged hadrons are analyzed at mid-rapidity and within the transverse momentum phase space. We observe a power-law behavior of scaled factorial moments in Au+Au collisions and a decrease in the extracted scaling exponent (ν) from peripheral to central collisions. The ν is consistent with a constant for different collisions energies in the mid-central (10-40\%) collisions. Moreover, the ν in the 0-5\% most central Au+Au collisions exhibits a non-monotonic energy dependence that reaches a possible minimum around sNN−−−√ = 27 GeV. The physics implications on the QCD phase structure are discussed.
Density fluctuations near the QCD critical point can be probed via an intermittency analysis in relativistic heavy-ion collisions. We report the first measurement of intermittency in Au+Au collisions at √sNN = 7.7-200 GeV measured by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The scaled factorial moments of identified charged hadrons are analyzed at mid-rapidity and within the transverse momentum phase space. We observe a power-law behavior of scaled factorial moments in Au+Au collisions and a decrease in the extracted scaling exponent (ν) from peripheral to central collisions. The ν is consistent with a constant for different collisions energies in the mid-central (10-40%) collisions. Moreover, the ν in the 0-5% most central Au+Au collisions exhibits a non-monotonic energy dependence that reaches a minimum around √sNN = 27 GeV. The physics implications on the QCD phase structure are discussed.
Observation of directed flow of hypernuclei Λ³H and Λ⁴H in √sNN = 3 GeV Au+Au collisions at RHIC
(2023)
We report here the first observation of directed flow (v1) of the hypernuclei 3ΛH and 4ΛH in mid-central Au+Au collisions at sNN−−−√ = 3 GeV at RHIC. These data are taken as part of the beam energy scan program carried out by the STAR experiment. From 165 × 106 events in 5%-40% centrality, about 8400 3ΛH and 5200 4ΛH candidates are reconstructed through two- and three-body decay channels. We observe that these hypernuclei exhibit significant directed flow. Comparing to that of light nuclei, it is found that the midrapidity v1 slopes of 3ΛH and 4ΛH follow baryon number scaling, implying that the coalescence is the dominant mechanism for these hypernuclei production in such collisions.
The linear and mode-coupled contributions to higher-order anisotropic flow are presented for Au+Au collisions at √sN N = 27, 39, 54.4, and 200 GeV and compared to similar measurements for Pb+Pb collisions at the Large Hadron Collider (LHC). The coefficients and the flow harmonics’ correlations, which characterize the linear and mode-coupled response to the lower-order anisotropies, indicate a beam energy dependence consistent with an influence from the specific shear viscosity (η/s). In contrast, the dimensionless coefficients, mode-coupled response coefficients, and normalized symmetric cumulants are approximately beam-energy independent, consistent with a significant role from initialstate effects. These measurements could provide unique supplemental constraints to (i) distinguish between different initial-state models and (ii) delineate the temperature (T ) and baryon chemical potential (μB ) dependence of the specific shear viscosity η s (T ,μB ).
The linear and mode-coupled contributions to higher-order anisotropic flow are presented for Au+Au collisions at sNN−−−√ = 27, 39, 54.4, and 200 GeV and compared to similar measurements for Pb+Pb collisions at the Large Hadron Collider (LHC). The coefficients and the flow harmonics' correlations, which characterize the linear and mode-coupled response to the lower-order anisotropies, indicate a beam energy dependence consistent with an influence from the specific shear viscosity (η/s). In contrast, the dimensionless coefficients, mode-coupled response coefficients, and normalized symmetric cumulants are approximately beam-energy independent, consistent with a significant role from initial-state effects. These measurements could provide unique supplemental constraints to (i) distinguish between different initial-state models and (ii) delineate the temperature (T) and baryon chemical potential (μB) dependence of the specific shear viscosity ηs(T,μB).
We measure triangular flow relative to the reaction plane at 3 GeV center-of-mass energy in Au+Au collisions at the BNL Relativistic Heavy Ion Collider. A significant v3 signal for protons is observed, which increases for higher rapidity, higher transverse momentum, and more peripheral collisions. The triangular flow is essentially rapidity-odd with a slope at mid-rapidity, dv3/dy|(y=0), opposite in sign compared to the slope for directed flow. No significant v3 signal is observed for charged pions and kaons. Comparisons with models suggest that a mean field potential is required to describe these results, and that the triangular shape of the participant nucleons is the result of stopping and nuclear geometry.
The longitudinal and transverse spin transfers to Λ (Λ¯¯¯¯) hyperons in polarized proton-proton collisions are expected to be sensitive to the helicity and transversity distributions, respectively, of (anti-)strange quarks in the proton, and to the corresponding polarized fragmentation functions. We report improved measurements of the longitudinal spin transfer coefficient, DLL, and the transverse spin transfer coefficient, DTT, to Λ and Λ¯¯¯¯ in polarized proton-proton collisions at s√ = 200 GeV by the STAR experiment at RHIC. The data set includes longitudinally polarized proton-proton collisions with an integrated luminosity of 52 pb−1, and transversely polarized proton-proton collisions with a similar integrated luminosity. Both data sets have about twice the statistics of previous results and cover a kinematic range of |ηΛ(Λ¯¯¯¯)| < 1.2 and transverse momentum pT,Λ(Λ¯¯¯¯) up to 8 GeV/c. We also report the first measurements of the hyperon spin transfer coefficients DLL and DTT as a function of the fractional jet momentum z carried by the hyperon, which can provide more direct constraints on the polarized fragmentation functions.
The longitudinal and transverse spin transfers to Λ (Λ¯¯¯¯) hyperons in polarized proton-proton collisions are expected to be sensitive to the helicity and transversity distributions, respectively, of (anti-)strange quarks in the proton, and to the corresponding polarized fragmentation functions. We report improved measurements of the longitudinal spin transfer coefficient, DLL, and the transverse spin transfer coefficient, DTT, to Λ and Λ¯¯¯¯ in polarized proton-proton collisions at s√ = 200 GeV by the STAR experiment at RHIC. The data set includes longitudinally polarized proton-proton collisions with an integrated luminosity of 52 pb−1, and transversely polarized proton-proton collisions with a similar integrated luminosity. Both data sets have about twice the statistics of previous results and cover a kinematic range of |ηΛ(Λ¯¯¯¯)| < 1.2 and transverse momentum pT,Λ(Λ¯¯¯¯) up to 8 GeV/c. We also report the first measurements of the hyperon spin transfer coefficients DLL and DTT as a function of the fractional jet momentum z carried by the hyperon, which can provide more direct constraints on the
We report results on an elastic cross section measurement in proton-proton collisions at a center-of-mass energy s√=510 GeV, obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section is measured in the four-momentum transfer squared range 0.23≤−t≤0.67 GeV2. We find that a constant slope B does not fit the data in the aforementioned t range, and we obtain a much better fit using a second-order polynomial for B(t). The t dependence of B is determined using six subintervals of t in the STAR measured t range, and is in good agreement with the phenomenological models. The measured elastic differential cross section dσ/dt agrees well with the results obtained at s√=546 GeV for proton--antiproton collisions by the UA4 experiment. We also determine that the integrated elastic cross section within the STAR t-range is σfidel=462.1±0.9(stat.)±1.1(syst.)±11.6(scale) μb.
We report a new measurement of the production of electrons from open heavy-flavor hadron decays (HFEs) at mid-rapidity (|y| < 0.7) in Au+Au collisions at √sNN = 200 GeV. Invariant yields of HFEs are measured for the transverse momentum range of 3.5 < pT < 9 GeV/c in various configurations of the collision geometry. The HFE yields in head-on Au+Au collisions are suppressed by approximately a factor of 2 compared to that in p + p collisions scaled by the average number of binary collisions, indicating strong interactions between heavy quarks and the hot and dense medium created in heavy-ion collisions. Comparison of these results with models provides additional tests of theoretical calculations of heavy quark energy loss in the quark-gluon plasma.
We report the first measurements of cumulants, up to 4𝑡ℎ order, of deuteron number distributions and protondeuteron correlations in Au+Au collisions recorded by the STAR experiment in phase-I of Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider. Deuteron cumulants, their ratios, and proton-deuteron mixed cumulants are presented for different collision centralities covering a range of center-of-mass energy per nucleon pair √𝑠NN = 7.7 to 200 GeV. It is found that the cumulant ratios at lower collision energies favor a canonical ensemble over a grand canonical ensemble in thermal models. An anti-correlation between proton and deuteron multiplicity is observed across all collision energies and centralities, consistent with the expectation from global baryon number conservation. The UrQMD model coupled with a phase-space coalescence mechanism qualitatively reproduces the collision-energy dependence of cumulant ratios and proton-deuteron correlations.
We report the first measurements of cumulants, up to 4th order, of deuteron number distributions and proton-deuteron correlations in Au+Au collisions recorded by the STAR experiment in phase-I of Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider. Deuteron cumulants, their ratios, and proton-deuteron mixed cumulants are presented for different collision centralities covering a range of center-of-mass energy per nucleon pair sNN−−−−√~=~7.7 to 200~GeV. It is found that the cumulant ratios at lower collision energies favor a canonical ensemble over a grand canonical ensemble in thermal models. An anti-correlation between proton and deuteron multiplicity is observed across all collision energies and centralities, consistent with the expectation from global baryon number conservation. The UrQMD model coupled with a phase-space coalescence mechanism qualitatively reproduces the collision-energy dependence of cumulant ratios and proton-deuteron correlations.
We report a new measurement of the production of electrons from open heavy-flavor hadron decays (HFEs) at mid-rapidity (|y|< 0.7) in Au+Au collisions at sNN−−−√=200 GeV. Invariant yields of HFEs are measured for the transverse momentum range of 3.5<pT<9 GeV/c in various configurations of the collision geometry. The HFE yields in head-on Au+Au collisions are suppressed by approximately a factor of 2 compared to that in p+p collisions scaled by the average number of binary collisions, indicating strong interactions between heavy quarks and the hot and dense medium created in heavy-ion collisions. Comparison of these results with models provides additional tests of theoretical calculations of heavy quark energy loss in the quark-gluon plasma.
We report a new measurement of the production of electrons from open heavy-flavor hadron decays (HFEs) at mid-rapidity (|y|< 0.7) in Au+Au collisions at sNN−−−√=200 GeV. Invariant yields of HFEs are measured for the transverse momentum range of 3.5<pT<9 GeV/c in various configurations of the collision geometry. The HFE yields in head-on Au+Au collisions are suppressed by approximately a factor of 2 compared to that in p+p collisions scaled by the average number of binary collisions, indicating strong interactions between heavy quarks and the hot and dense medium created in heavy-ion collisions. Comparison of these results with models provides additional tests of theoretical calculations of heavy quark energy loss in the quark-gluon plasma.