Quark-antiquark recombination in the low-transverse-momentum region

Gupt, Chandra; Shivpuri, R. K.; Verma, Neha; Sharma, Amrita

doi:10.1007/bf02829879

Cited by 12 publications

(7 citation statements)

References 11 publications

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“…In central heavy ion collisions many more partons are produced than in collisions of single hadrons. The idea that recombination may then be important for a wide range of rapidities -and at least up to moderate transverse momenta -was advocated before [27,28,29]. How-ever, it was only recently that RHIC data indicated that recombination could indeed be a valid approach up to surprisingly high transverse momenta of a few GeV/c.…”

Section: The Recombination Conceptmentioning

confidence: 99%

Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase

et al. 2003

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We discuss hadron production in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC). We argue that hadrons at transverse momenta P T Ͻ5 GeV are formed by recombination of partons from the dense parton phase created in central collisions at RHIC. We provide a theoretical description of the recombination process for P T Ͼ2 GeV. Below P T =2 GeV our results smoothly match a purely statistical description. At high transverse momentum hadron production is well described in the language of perturbative QCD by the fragmentation of partons. We give numerical results for a variety of hadron spectra, ratios, and nuclear suppression factors. We also discuss the anisotropic flow v 2 and give results based on a flow in the parton phase. Our results are consistent with the existence of a parton phase at RHIC hadronizing at a temperature of 175 MeV and a radial flow velocity of 0.55c.

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Section: The Recombination Conceptmentioning

confidence: 99%

Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase

et al. 2003

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“…In heavy ion collisions it is the distribution of thermal partons. First applications of the coalescence picture to nuclear collisions appeared in the early 1980s (28).…”

Section: Early Approaches To Recombinationmentioning

confidence: 99%

Coalescence Models for Hadron Formation from Quark-Gluon Plasma

Fries

Greco

Sorensen

2008

Annu. Rev. Nucl. Part. Sci.

258

220

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We review hadron formation from a deconfined quark gluon plasma (QGP) via coalescence or recombination of quarks and gluons. We discuss the abundant experimental evidence for coalescence from the Relativistic Heavy Ion Collider (RHIC) and compare the various coalescence models advocated in the literature. We comment on the underlying assumptions and remaining challenges as well as the merits of the models. We conclude with a discussion of some recent developments in the field.

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“…This mechanism has recently been identified as the source of unnatural isospin ratios in the production of D-mesons in the fragmentation region in π − + A interactions at Fermilab [11]. Hadron production in heavy ion collisions by recombination of quarks has been considered before [12], primarily at small transverse momentum. Quark recombination has recently been invoked to explain some aspects of the RHIC data, such as the flavor pattern of elliptic flow [13], and in the context of a scaling model [14].…”

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confidence: 99%

Hadronization in Heavy-Ion Collisions: Recombination and Fragmentation of Partons

et al. 2003

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We argue that the emission of hadrons with transverse momentum up to about 5 GeV/c in central relativistic heavy ion collisions is dominated by recombination, rather than fragmentation of partons. This mechanism provides a natural explanation for the observed constant baryon-to-meson ratio of about one and the apparent lack of a nuclear suppression of the baryon yield in this momentum range. Fragmentation becomes dominant at higher transverse momentum, but the transition point is delayed by the energy loss of fast partons in dense matter.

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Quark-antiquark recombination in the low-transverse-momentum region

Cited by 12 publications

References 11 publications

Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase

Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase

Coalescence Models for Hadron Formation from Quark-Gluon Plasma

Hadronization in Heavy-Ion Collisions: Recombination and Fragmentation of Partons

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