Hadron Correlations and Parton Recombination

Fries, Rainer J.

doi:10.1016/j.nuclphysa.2006.11.018

Cited by 7 publications

(4 citation statements)

References 36 publications

(29 reference statements)

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“…The related low-p T issues of QCM such as entropy conservation and pion production have been properly addressed [12,20,[25][26][27][28][29]. There are also many successful applications of QCM on correlation studies, e.g., multi-hadron yield correlations [15][16][17]30], baryon-meson correlated emission [31,32] as well as the charge balance function [33,34]. …”

Section: Yields Of Strange Hadrons At Lhcmentioning

confidence: 99%

Baryon-strangeness correlation in quark combination models

Shao

Wang

2015

Phys. Rev. C

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The baryon-strangeness correlation in the hadronization of the quark matter is studied within the quark combination mechanism. We calculate the correlation coefficient C BS = −3 BS − B S / S 2 − S 2 of initial hadrons produced from the deconfined free quark system with C (q) BS = 1. The competition of the production of baryons against that of mesons is the key dynamics that is most relevant to the change of baryon-strangeness correlation during system hadronization. Results of quark combination under the Poisson statistics agree with the statistical model predictions for a hadron resonance gas at vanishing chemical potential but differ from those at relatively large chemical potentials. Results beyond Poisson statistics are also obtained and are compared with calculations of Lattice QCD in the phase boundary, giving the best agreement at temperature T = 163 MeV. We predict the dependence of the C BS of hadron system on the baryon chemical potential and strangeness. These predictions are expected to be tested by the future Lattice QCD calculations at non-zero chemical potentials and/or by the Beam Energy Scan experiment of STAR Collaboration at RHIC.

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Section: Yields Of Strange Hadrons At Lhcmentioning

confidence: 99%

Baryon-strangeness correlation in quark combination models

Shao

Wang

2015

Phys. Rev. C

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“…A predicted higher energy loss for in-medium gluons should then result in even larger jet-like yields for non-pion triggers [41]. On the other hand, particle production from recombination should produce smaller yields than particle production from hard processes (fragmentation) [30], thus diluting (reducing) per-trigger associated yields. This dilution effect would be stronger for baryons, as more intermediate-p T baryons than mesons are expected to be formed through such a mechanism.…”

mentioning

confidence: 97%

“…This kinematic range focuses on a particularly interesting region where trigger particle production is thought to be dominated by fragmentation, at least in pp and d+Au collisions. For the same range in Au+Au events, the baryon-to-meson enhancement is large, suggesting significant recombination contributions [30]. Since the medium induced jet quenching affects the correlations in essentially an opposite way from thermal parton recombination contributions, comparing the correlations for proton and pion triggers provides an additional handle for separating these effects.…”

mentioning

confidence: 99%

Di-Hadron Correlations with Identified Leading Hadrons in 200 GeV Au+Au and d+Au Collisions at STAR

Adamczyk,

Adkins,

Agakishiev

et al. 2014

Preprint

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The STAR collaboration presents for the first time two-dimensional di-hadron correlations with identified leading hadrons in 200 GeV central Au+Au and minimum-bias d+Au collisions to explore hadronization mechanisms in the quark gluon plasma. The enhancement of the jet-like yield for leading pions in Au+Au data with respect to the d+Au reference and the absence of such an enhancement for leading non-pions (protons and kaons) are discussed within the context of a quark recombination scenario. The correlated yield at large angles, specifically in the ridge region, is found to be significantly higher for leading non-pions than pions. The consistencies of the constituent quark scaling, azimuthal harmonic model and a mini-jet modification model description of the data are tested, providing further constraints on hadronization.

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“…Recombination models incorporating coalescence of two or three thermal quarks to form a meson or a baryon are able to reproduce the observed enhancement [4,5]. In di-hadron analyses, recombination of thermal quarks into a hadron in the trigger p T range would lead to a 'trigger dilution' effect: more intermediate p T baryons than mesons without correlated jet-like yield would lead to a lower associated per-trigger yield at small relative angles for a correlation measurement using baryons as leading particles compared to mesons [6,7]. This expectation has not been conclusively confirmed by previous correlation studies with identified triggers [8,9].…”

mentioning

confidence: 97%

Leading hadron PID effects in di-hadron angular correlations from STAR

Kauder¹

2011

J. Phys. G: Nucl. Part. Phys.

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We present preliminary results of a di-hadron correlation analysis with identified triggers, measured as a function of relative azimuth ( φ) and pseudorapidity ( η). The relativistic rise in the momentum dependence of the ionization energy loss of particles measured in the STAR TPC is used to statistically separate charged pions from kaons and protons. On the near side, the long range η correlation known as the ridge is revealed to have a strong trigger-type dependence, providing new constraints for its theoretical description. The jet-like cone structure above the ridge, while also trigger-dependent, shows little modification compared to d+Au measurements, challenging expectations from recombination models.

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Hadron Correlations and Parton Recombination

Cited by 7 publications

References 36 publications

Baryon-strangeness correlation in quark combination models

Baryon-strangeness correlation in quark combination models

Di-Hadron Correlations with Identified Leading Hadrons in 200 GeV Au+Au and d+Au Collisions at STAR

Leading hadron PID effects in di-hadron angular correlations from STAR

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