scholarly journals 1-loop matching of a thermal Lorentz force

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
M. Laine
Keyword(s):  
Heavy Quark ◽  
Lorentz Force ◽  
Quark Mass ◽  
Anomalous Dimension ◽  
Vector Current ◽  
Heavy Quarks ◽  
Mass Scale ◽  
The Other ◽  
Magnetic Part ◽  
Heavy Quark Mass

Abstract Studying the diffusion and kinetic equilibration of heavy quarks within a hot QCD medium profits from the knowledge of a coloured Lorentz force that acts on them. Starting from the spatial components of the vector current, and carrying out two matching computations, one for the heavy quark mass scale (M) and another for thermal scales $$ \left(\sqrt{MT},T\right) $$ MT T , we determine 1-loop matching coefficients for the electric and magnetic parts of a Lorentz force. The magnetic part has a non-zero anomalous dimension, which agrees with that extracted from two other considerations, one thermal and the other in vacuum. The matching coefficient could enable a lattice study of a colour-magnetic 2-point correlator.

scholarly journals Strange and heavy hadrons production from coalescence plus fragmentation in AA collisions at RHIC and LHC

2018 ◽  
Vol 171 ◽  
pp. 13005
Author(s):  
Salvatore Plumari ◽  
Vincenzo Minissale ◽  
Santosh K. Das ◽  
Francesco Scardina ◽  
Vincenzo Greco
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Heavy Baryon ◽  
Heavy Quarks ◽  
Heavy Quark Mass ◽  
Heavy Hadron ◽  
Light Baryon ◽  
The One ◽  
Aa Collisions

In a coalescence plus fragmentation approach we study the pT spectra of charmed hadrons D0, Ds up to about 10 GeV and the Λ+c /D0 ratio from RHIC to LHC energies. In this study we have included the contribution from decays of heavy hadron resonances and also that due to fragmentation of heavy quarks that are left in the system after coalescence. The pT dependence of the heavy baryon/meson ratios is found to be sensitive to the heavy quark mass. In particular we found that the Λc/D0 is much flatter than the one for light baryon/meson ratio like p/π and Λ/K.

scholarly journals Heavy-flavor hadro-production with heavy-quark masses renormalized in the $$ \overline{\mathrm{MS}} $$, MSR and on-shell schemes

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
M. V. Garzelli ◽  
L. Kemmler ◽  
S. Moch ◽  
O. Zenaiev
Keyword(s):  
Heavy Quark ◽  
Cross Sections ◽  
Top Quark ◽  
Quark Mass ◽  
Production Cross ◽  
Hadron Collider ◽  
Distribution Functions ◽  
Heavy Flavor ◽  
Parton Distribution Functions ◽  
Heavy Quark Mass

Abstract We present predictions for heavy-quark production at the Large Hadron Collider making use of the $$ \overline{\mathrm{MS}} $$ MS ¯ and MSR renormalization schemes for the heavy-quark mass as alternatives to the widely used on-shell renormalization scheme. We compute single and double differential distributions including QCD corrections at next-to-leading order and investigate the renormalization and factorization scale dependence as well as the perturbative convergence in these mass renormalization schemes. The implementation is based on publicly available programs, MCFM and xFitter, extending their capabilities. Our results are applied to extract the top-quark mass using measurements of the total and differential $$ t\overline{t} $$ t t ¯ production cross-sections and to investigate constraints on parton distribution functions, especially on the gluon distribution at low x values, from available LHC data on heavy-flavor hadro-production.

scholarly journals Finite density QCD phase transition in the heavy quark mass region

2012 ◽  
Author(s):  
Hana Saito ◽  
Sinya Aoki ◽  
K. Kanaya ◽  
Hiroshi Ohno ◽  
S. Ejiri ◽  
...  
Keyword(s):  
Phase Transition ◽  
Heavy Quark ◽  
Quark Mass ◽  
Mass Region ◽  
Finite Density ◽  
Qcd Phase Transition ◽  
Heavy Quark Mass

scholarly journals Heavy Quark Mass Effects in PQCD and Heavy Flavor Parton Distributions

2007 ◽  
Author(s):  
Wu-Ki Tung ◽  
Hung-Liang Lai ◽  
Jonathan Pumplin ◽  
Pavel Nadolsky
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Heavy Flavor ◽  
Parton Distributions ◽  
Mass Effects ◽  
Heavy Quark Mass

HYPERFINE MIXING IN b → c SEMILEPTONIC AND ELECTROMAGNETIC DECAYS OF DOUBLY HEAVY bc BARYONS

2014 ◽  
Vol 26 ◽  
pp. 1460107
Author(s):  
C. ALBERTUS ◽  
E. HERNÁNDEZ ◽  
J. NIEVES
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Semileptonic Decay ◽  
Spin Symmetry ◽  
Mass Limit ◽  
Electromagnetic Decays ◽  
Heavy Quark Mass ◽  
Quark Spin ◽  
Heavy Quark Spin Symmetry ◽  
Symmetry Relations

We show that semileptonic and electromagnetic decays involving spin-1/2 doubly heavy bc baryons are very sensitive to hyperfine mixing in their wave functions. We further show how heavy quark spin symmetry relations, obtained in the infinite heavy quark mass limit and near zero recoil, could be used to extract the admixtures in a model independent way from semileptonic decay data. On the other hand the infinite heavy quark mass limit gives wrong predictions in the electromagnetic case.

scholarly journals A Gluon Condensate Term in a Heavy Quark Mass

2003 ◽  
Vol 18 (25) ◽  
pp. 1735-1741
Author(s):  
V. V. Kiselev
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Mass Shell ◽  
Gluon Condensate ◽  
Heavy Quark Mass ◽  
Dispersion Law

We investigate a connection between a renormalon ambiguity of heavy quark mass and the gluon condensate contribution into the quark dispersion law related to a virtuality defining a displacement of the heavy quark from the perturbative mass-shell, which happens inside a hadron.

scholarly journals Heavy quark mass effects in e+e− into three jets

1999 ◽  
Vol 74 (1-3) ◽  
pp. 53-56 ◽  
Author(s):  
Mikhail Bilenky ◽  
Germán Rodrigo ◽  
Arcadi Santamaria
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Mass Effects ◽  
Heavy Quark Mass
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