scholarly journals Soft gluon resummation for heavy quark electroproduction

1999 ◽  
Vol 59 (3) ◽  
Author(s):  
Eric Laenen ◽  
Sven-Olaf Moch
Keyword(s):  
Heavy Quark ◽  
Soft Gluon

scholarly journals Soft gluon emission off a heavy quark revisited

2012 ◽  
Vol 85 (5) ◽  
Author(s):  
Raktim Abir ◽  
Carsten Greiner ◽  
Mauricio Martinez ◽  
Munshi G. Mustafa ◽  
Jan Uphoff
Keyword(s):  
Heavy Quark ◽  
Soft Gluon ◽  
Gluon Emission

scholarly journals On Nonleptonic Decays of Supermultiplets

2000 ◽  
Vol 53 (6) ◽  
pp. 737 ◽  
Author(s):  
R. Delbourgo ◽  
Dongsheng Liu
Keyword(s):  
Heavy Quark ◽  
Pseudoscalar Meson ◽  
Constituent Quark ◽  
Weak Interactions ◽  
Weak Decay ◽  
Soft Gluon ◽  
Strong Interactions ◽  
Heavy Particles ◽  
Quark Masses ◽  
Quark Theory

By describing strong interactions between hadrons via a relativistic supermultiplet scheme and regarding weak interactions as a perturbation thereof, we derive expressions for nonleptonic weak decay amplitudes in terms of constituent quark masses and CKM angles, with no other parameters. Application of this method leads to ΔI = dominance in some pseudoscalar meson decays if one scales down the couplings of heavy particles by M mass factors, in keeping with heavy quark theory expectations. However, certain B and D decay processes to kaons are badly predicted and point to substantial soft gluon renormalisation effects inW-quark interactions.

On the Drag Force of a Heavy Quark via 5d Kerr-AdS Background

2020 ◽  
Vol 51 (4) ◽  
pp. 535-539
Author(s):  
I. Aref’eva ◽  
A. Golubtsova ◽  
E. Gourgoulhon
Keyword(s):  
Heavy Quark ◽  
Drag Force

scholarly journals Covariant phase space and soft factorization in non-Abelian gauge theories

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Temple He ◽  
Prahar Mitra
Keyword(s):  
Phase Space ◽  
Ward Identity ◽  
Gauge Theories ◽  
Minkowski Spacetime ◽  
Soft Gluon ◽  
Careful Study ◽  
Abelian Gauge ◽  
Gauge Sector ◽  
Vacuum States ◽  
The One

Abstract We perform a careful study of the infrared sector of massless non-abelian gauge theories in four-dimensional Minkowski spacetime using the covariant phase space formalism, taking into account the boundary contributions arising from the gauge sector of the theory. Upon quantization, we show that the boundary contributions lead to an infinite degeneracy of the vacua. The Hilbert space of the vacuum sector is not only shown to be remarkably simple, but also universal. We derive a Ward identity that relates the n-point amplitude between two generic in- and out-vacuum states to the one computed in standard QFT. In addition, we demonstrate that the familiar single soft gluon theorem and multiple consecutive soft gluon theorem are consequences of the Ward identity.

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