PHENIX heavy flavor highlights

International Journal of Modern Physics E ◽

10.1142/s0218301320400066 ◽

2020 ◽

pp. 2040006

Author(s):

Takashi Hachiya

Keyword(s):

Perturbative Qcd ◽

Semileptonic Decay ◽

Large Mass ◽

High Energy ◽

Gluon Density ◽

Experimental Results ◽

Heavy Flavor ◽

Phenix Experiment ◽

Heavy Flavor Production

Heavy flavor production is a sensitive probe of the initial gluon density in the nucleon and is modified by the entire evolution of the hot quark and gluon medium created in high-energy nucleus–nucleus collisions. Besides, it is a process that can be calculated by perturbative QCD because of their large mass. The PHENIX experiment at RHIC studied the heavy flavor productions for a broad momentum and rapidity ranges using single leptons from the semileptonic decay of charm and bottom hadrons, and dileptons from [Formula: see text] decays in [Formula: see text], [Formula: see text]A, and Au [Formula: see text] Au collisions at [Formula: see text][Formula: see text]200[Formula: see text]GeV. In these proceedings, the recent experimental results in [Formula: see text], Au [Formula: see text] Au, and the small collision systems are presented and the heavy flavor productions and their modifications are discussed.

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PHENIX Measurements of Heavy Flavor in Small Systems

EPJ Web of Conferences ◽

10.1051/epjconf/201817201001 ◽

2018 ◽

Vol 172 ◽

pp. 01001

Author(s):

Alexandre Lebedev

Keyword(s):

Dense Matter ◽

High Energy ◽

Heavy Flavor ◽

Small Systems ◽

Rapidity Range ◽

Nuclear Collisions ◽

Phenix Experiment ◽

Heavy Flavor Production

The study of heavy flavor production in proton-nucleus and nucleus-nucleus collisions is a sensitive probe of the hot and dense matter created in such collisions. Installation of silicon vertex detectors in the PHENIX experiment, and increased performance of the BNL RHIC collider allowed collection of large amount of data on heavy flavor production in small colliding systems. In this talk we will present recent PHENIX results on open heavy flavor and quarkonia production in p+p, p+A, d+A, and He3+A colliding systems in a broad rapidity range, and discuss how these measurements help us to better understand all stages of nuclear collisions at high energy.

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Experimental Overview on Heavy Flavor Production in Heavy Ion Collisions.

EPJ Web of Conferences ◽

10.1051/epjconf/201817204004 ◽

2018 ◽

Vol 172 ◽

pp. 04004

Author(s):

Cesar L. da Silva

Keyword(s):

Heavy Ion ◽

High Energy ◽

Mass Hierarchy ◽

Heavy Flavor ◽

Nuclear Collisions ◽

Ion Collisions ◽

Heavy Flavor Production ◽

200 Gev ◽

The Media ◽

8 Tev

The use of probes containing heavy quarks is one of the pillars for the study of medium formed in high energy nuclear collisions. The conceptual ideas formulated more than two decades ago, such as quark mass hierarchy of the energy that the probe lose in the media and color screening of bound heavy quarkonia states, have being challenged by the measurements performed at RHIC and LHC. A summary of the most recent experimental observations involving charm and bottom quarks in pp, pA, and AA collisions from collisions energies extending from √sNN =200 GeV to 8 TeV is presented. This manuscript also discuss possibilities of new measurements which can be at reach with increased statistics and detector upgrades.

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A New Heavy Flavor Program for the Future Electron-Ion Collider

EPJ Web of Conferences ◽

10.1051/epjconf/202023504002 ◽

2020 ◽

Vol 235 ◽

pp. 04002 ◽

Cited By ~ 2

Author(s):

Xuan Li ◽

Ivan Vitev ◽

Melynda Brooks ◽

Lukasz Cincio ◽

J. Matthew Durham ◽

...

Keyword(s):

Energy Loss ◽

National Laboratory ◽

Heavy Ion ◽

High Energy ◽

Distribution Functions ◽

Heavy Flavor ◽

Relativistic Heavy Ion Collider ◽

Initial State ◽

Heavy Flavor Production ◽

The Future

The proposed high-energy and high-luminosity Electron–Ion Collider (EIC) will provide one of the cleanest environments to precisely determine the nuclear parton distribution functions (nPDFs) in a wide x–Q2 range. Heavy flavor production at the EIC provides access to nPDFs in the poorly constrained high Bjorken-x region, allows us to study the quark and gluon fragmentation processes, and constrains parton energy loss in cold nuclear matter. Scientists at the Los Alamos National Laboratory are developing a new physics program to study heavy flavor production, flavor tagged jets, and heavy flavor hadron-jet correlations in the nucleon/nucleus going direction at the future EIC. The proposed measurements will provide a unique way to explore the flavor dependent fragmentation functions and energy loss in a heavy nucleus. They will constrain the initial-state eﬀects that are critical for the interpretation of previous and ongoing heavy ion measurements at the Relativistic Heavy Ion Collider and the Large Hadron Collider. We show an initial conceptual design of the proposed Forward Silicon Tracking (FST) detector at the EIC, which is essential to carry out the heavy flavor measurements. We further present initial feasibility studies/simulations of heavy flavor hadron reconstruction using the proposed FST.

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AN of Single Heavy Flavor Decay Muon in the PHENIX Experiment at RHIC

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194516600430 ◽

2016 ◽

Vol 40 ◽

pp. 1660043 ◽

Cited By ~ 1

Author(s):

Xiaorong Wang ◽

Feng Wei

Keyword(s):

Transverse Momentum ◽

Spin Asymmetry ◽

Single Spin Asymmetry ◽

Transverse Spin ◽

Heavy Flavor ◽

Spin Asymmetries ◽

Single Spin ◽

Phenix Experiment ◽

Single Spin Asymmetries ◽

Heavy Flavor Production

Transverse single-spin asymmetries provide valuable information about the spin structure of the nucleon. At RHIC energies, heavy-flavor production is dominated by gluon-gluon fusion, and the subsequent decay into high [Formula: see text] electrons or muons can be observed statistically in a collider detector like PHENIX. The transverse single-spin asymmetry in heavy-flavor production originates from the initial state correlation between the internal transverse momentum of the parton and the transverse spin of the nucleon (similar with the known Sivers effect). The measurement of transverse single-spin asymmetry of single muons from heavy flavor decay at RHIC serves as a clean probe and would provide important information on the gluon Sivers function. In 2012, the PHENIX experiment collected 9.2 [Formula: see text] integrated luminosity in transversely polarized [Formula: see text] collisions at [Formula: see text] = 200 GeV with a polarization of [Formula: see text]. The signal-to-background ratio was improved by a factor of two compared to the previous RHIC 2006 and 2008 results in high transverse momentum region ([Formula: see text]GeV). The recent PHENIX preliminary results of transverse single-spin asymmetries of single heavy flavor decay muon at forward-rapidity will be shown and the possible improvement on this measurement in 2015 with the help of the FVTX detector will be discussed.

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