scholarly journals Heavy-quark-mass expansion of vector and tensor currents and intrinsic charm in nucleon form factors

2016 ◽  
Vol 2016 (1) ◽  
Author(s):  
Maxim V. Polyakov ◽  
Jan Sieverding
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Form Factors ◽  
Intrinsic Charm ◽  
Heavy Quark Mass ◽  
Nucleon Form Factors ◽  
Mass Expansion

scholarly journals Heavy quark mass expansion and intrinsic charm in light hadrons

2000 ◽  
Vol 62 (7) ◽  
Author(s):  
M. Franz ◽  
M. Polyakov ◽  
K. Goeke
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Intrinsic Charm ◽  
Heavy Quark Mass ◽  
Mass Expansion

scholarly journals Heavy quark mass dependence of semileptonic form factors for B decays

1998 ◽  
Vol 63 (1-3) ◽  
pp. 380-382 ◽  
Author(s):  
S. Aoki ◽  
M. Fukugita ◽  
S. Hashimoto ◽  
K.-I. Ishikawa ◽  
N. Ishizuka ◽  
...  
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Form Factors ◽  
Mass Dependence ◽  
B Decays ◽  
Heavy Quark Mass ◽  
Quark Mass Dependence

scholarly journals Heavy quark mass expansion for the operator and the charm content of η,η′

1999 ◽  
Vol 454 (3-4) ◽  
pp. 335-338 ◽  
Author(s):  
M. Franz ◽  
P.V. Pobylitsa ◽  
M.V. Polyakov ◽  
K. Goeke
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Heavy Quark Mass ◽  
Mass Expansion

scholarly journals Dependence of the form factors of B → πℓν on the heavy quark mass

1994 ◽  
Vol 327 (1-2) ◽  
pp. 123-128 ◽  
Author(s):  
Pietro Colangelo ◽  
Pietro Santorelli
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Form Factors ◽  
Heavy Quark Mass

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 Consistent treatment of rapidity divergence in soft-collinear effective theory

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Junegone Chay ◽  
Chul Kim
Keyword(s):  
Heavy Quark ◽  
Soft Mode ◽  
Form Factors ◽  
Effective Theory ◽  
Large Rapidity ◽  
Soft Modes ◽  
Heavy Quark Mass ◽  
Soft Collinear Effective Theory ◽  
Matching Procedure ◽  
Consistent Treatment

Abstract In soft-collinear effective theory, we analyze the structure of rapidity divergence due to the collinear and soft modes residing in disparate phase spaces. The idea of an effective theory is applied to a system of collinear modes with large rapidity and soft modes with small rapidity. The large-rapidity (collinear) modes are integrated out to obtain the effective theory for the small-rapidity (soft) modes. The full SCET with the collinear and soft modes should be matched onto the soft theory at the rapidity boundary, and the matching procedure becomes exactly the zero-bin subtraction. The large-rapidity region is out of reach for the soft mode, which results in the rapidity divergence. The rapidity divergence in the collinear sector comes from the zero-bin subtraction, which ensures the cancellation of the rapidity divergences from the soft and collinear sectors. In order to treat the rapidity divergence, we construct the rapidity regulators consistently for all the modes. They are generalized by assigning independent rapidity scales for different collinear directions. The soft regulator incorporates the correct directional dependence when the innate collinear directions are not back-to-back, which is discussed in the N-jet operator. As an application, we consider the Sudakov form factor for the back-to-back collinear current and the soft-collinear current, where the soft rapidity regulator for a soft quark is developed. We extend the analysis to the boosted heavy quark sector and exploit the delicacy with the presence of the heavy quark mass. We present the resummed results of large logarithms in the form factors for various currents with the light and the heavy quarks, employing the renormalization group evolution on the renormalization and the rapidity scales.

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
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