Measurements of the transverse-momentum-dependent cross sections of J /ψ production at mid-rapidity in proton+proton collisions at s =510 and 500 GeV with the STAR detector
Genre
Journal ArticleDate
2019-09-19Author
Adam, JAdamczyk, L
Adams, JR
Adkins, JK
Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alekseev, I
Anderson, DM
Aoyama, RAparin, AArkhipkin, DAschenauer, ECAshraf, MUAtetalla, FAttri, AAverichev, GSBairathi, VBarish, KBassill, AJBehera, ABellwied, RBhasin, ABhati, AKBielcik, JBielcikova, JBland, LCBordyuzhin, IGBrandenburg, JDBrandin, AVBryslawskyj, JBunzarov, IButterworth, JCaines, HCalderón De La Barca Sánchez, MCebra, DChakaberia, IChaloupka, PChan, BKChang, FHChang, ZChankova-Bunzarova, NChatterjee, AChattopadhyay, SChen, JHChen, XCheng, JCherney, MChristie, WCrawford, HJCsanád, MDas, SDedovich, TGDeppner, IMDerevschikov, AADidenko, LDilks, CDong, XDrachenberg, JLDunlop, JCEdmonds, TElsey, NEngelage, JEppley, GEsha, REsumi, SEvdokimov, OEwigleben, JEyser, OFatemi, RFazio, SFederic, PFedorisin, JFeng, YFilip, PFinch, EFisyak, YFulek, LGagliardi, CAGalatyuk, TGeurts, FGibson, AGrosnick, DGupta, AGuryn, WHamad, AIHamed, AHarris, JWHe, LHeppelmann, SHeppelmann, SHerrmann, NHolub, LHong, YHorvat, SHuang, BHuang, HZHuang, SLHuang, THuang, X
Permanent link to this record
http://hdl.handle.net/20.500.12613/4305Metadata
Show full item recordDOI
10.1103/PhysRevD.100.052009Abstract
© 2019 authors. Published by the American Physical Society. We present measurements of the differential cross sections of inclusive J/ψ meson production as a function of transverse momentum (pTJ/ψ) using the μ+μ- and e+e- decay channels in proton+proton collisions at center-of-mass energies of 510 and 500 GeV, respectively, recorded by the STAR detector at the Relativistic Heavy Ion Collider. The measurement from the μ+μ- channel is for 0<pTJ/ψ<9 GeV/c and rapidity range |yJ/ψ|<0.4, and that from the e+e- channel is for 4<pTJ/ψ<20 GeV/c and |yJ/ψ|<1.0. The ψ(2S) to J/ψ ratio is also measured for 4<pTmeson<12 GeV/c through the e+e- decay channel. Model calculations, which incorporate different approaches toward the J/ψ production mechanism, are compared with experimental results and show reasonable agreement within uncertainties.Citation to related work
American Physical Society (APS)Has part
Physical Review DADA compliance
For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.eduScopus Count
Collections
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0/
Related items
Showing items related by title, author, creator and subject.
-
The detector system of the Daya Bay reactor neutrino experiment© 2015 Elsevier B.V. All rights reserved. The Daya Bay experiment was the first to report simultaneous measurements of reactor antineutrinos at multiple baselines leading to the discovery of ν¯e oscillations over km-baselines. Subsequent data has provided the world's most precise measurement of sin22θ13 and the effective mass splitting Δmee2. The experiment is located in Daya Bay, China where the cluster of six nuclear reactors is among the world's most prolific sources of electron antineutrinos. Multiple antineutrino detectors are deployed in three underground water pools at different distances from the reactor cores to search for deviations in the antineutrino rate and energy spectrum due to neutrino mixing. Instrumented with photomultiplier tubes, the water pools serve as shielding against natural radioactivity from the surrounding rock and provide efficient muon tagging. Arrays of resistive plate chambers over the top of each pool provide additional muon detection. The antineutrino detectors were specifically designed for measurements of the antineutrino flux with minimal systematic uncertainty. Relative detector efficiencies between the near and far detectors are known to better than 0.2%. With the unblinding of the final two detectors' baselines and target masses, a complete description and comparison of the eight antineutrino detectors can now be presented. This paper describes the Daya Bay detector systems, consisting of eight antineutrino detectors in three instrumented water pools in three underground halls, and their operation through the first year of eight detector data-taking.
-
Beam-energy dependence of identified two-particle angular correlations ins root s(NN)=7.7-200 GeV Au + Au collisionsThe two-particle angular correlation functions, $R_2$, of pions, kaons, and protons in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV were measured by the STAR experiment at RHIC. These correlations were measured for both like-sign and unlike-sign charge combinations and versus the centrality. The correlations of pions and kaons show the expected near-side ({\it i.e.}, at small relative angles) peak resulting from short-range mechanisms. The amplitudes of these short-range correlations decrease with increasing beam energy. However, the proton correlation functions exhibit strong anticorrelations in the near-side region. This behavior is observed for the first time in an A+A collision system. The observed anticorrelation is $p_{T}$-independent and decreases with increasing beam energy and centrality. The experimental results are also compared to the Monte Carlo models UrQMD, Hijing, and AMPT.
-
First Observation of the Directed Flow of D-0 and <(D-0)over bar> in Au +Au Collisions at root s(NN)=200 GeVWe report the first measurement of rapidity-odd directed flow (v_{1}) for D^{0} and D^{0}[over ¯] mesons at midrapidity (|y|<0.8) in Au+Au collisions at sqrt[s_{NN}]=200 GeV using the STAR detector at the Relativistic Heavy Ion Collider. In 10-80% Au+Au collisions, the slope of the v_{1} rapidity dependence (dv_{1}/dy), averaged over D^{0} and D^{0}[over ¯] mesons, is -0.080±0.017(stat)±0.016(syst) for transverse momentum p_{T} above 1.5 GeV/c. The absolute value of D^{0} meson dv_{1}/dy is about 25 times larger than that for charged kaons, with 3.4σ significance. These data give a unique insight into the initial tilt of the produced matter, and offer constraints on the geometric and transport parameters of the hot QCD medium created in relativistic heavy-ion collisions.
