Soft Gluon Radiation off Heavy Quarks beyond Eikonal Approximation

Bhattacharyya, Trambak; Mazumder, Surasree; Abir, Raktim

doi:10.48550/arxiv.1307.6931

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Factorization Gradient Expansion and Resummation1

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Cited by 2 publications

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“…Also the present calculation assumes eikonal apporximation for the heavy quark propagator in the medium. If certain non-eikonal approximation [48] is considered, the effects of soft gluon bremsstrahlung at various p T regime might change. Similarly transverse expansion of the medium might also bring in some considerable effects which is absent in the present calculations.…”

Section: Resultsmentioning

confidence: 99%

Nuclear modification and azimuthal anisotropy of D mesons produced in relativistic heavy ion collision

Younus

2015

Preprint

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Section: Resultsmentioning

confidence: 99%

Nuclear modification and azimuthal anisotropy of D mesons produced in relativistic heavy ion collision

Younus

2015

Preprint

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“…The subject of heavy quark energy loss is not yet a settled issue and requires more detailed analysis [21,22]. In this work, the propagation of a single 'semi-hard' heavy quark in the dense nuclear medium have been studied within an extension of higher twist framework that includes multiple scatterings also.…”

Section: Factorization Gradient Expansion and Resummationmentioning

confidence: 99%

Multiple scattering of heavy quarks in dense matter and the parametric prominence of drag

Abir

Kaur

Majumder³

2014

Phys. Rev. D

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The case of heavy quark propagation in dense extended matter is studied in the multiple scattering formalism of the higher twist energy loss scheme. We consider the case of deep inelastic scattering off a large nucleus. The hard lepton scatters off a heavy quark fluctuation within one of the nucleons. This heavy quark then propagates through the dense medium, multiply scattering off the gluon field of the remaining nucleons in its path. We consider the fictitious process where a heavy quark propagates through the nucleus without radiation. Invoking Soft-Collinear Effective Theory power counting arguments, we consider the case of a "semi-hard" heavy-quark where the mass is of the order of the out-going momentum and larger than the transverse momentum imparted per unit length due to scattering. In this limit, it is found that longitudinal momentum exchanges (quantified by the transport coefficientê) have a comparable effect on the off-shellness of the propagating quark, as the transverse momentum exchanges (quantified byq) which constitute the leading cause of off-shellness for propagating light quarks or gluons. Consequences of this new hierarchy for the propagation of the heavy quark in dense matter are discussed.

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Soft Gluon Radiation off Heavy Quarks beyond Eikonal Approximation

Cited by 2 publications

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Nuclear modification and azimuthal anisotropy of D mesons produced in relativistic heavy ion collision

Nuclear modification and azimuthal anisotropy of D mesons produced in relativistic heavy ion collision

Multiple scattering of heavy quarks in dense matter and the parametric prominence of drag

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