Mass effects in the emission of gluons from heavy quarks at high energies

Non-leading mass effects in the effective weak Hamiltonian for Δc = 1 decays

Canadian Journal of Physics ◽

10.1139/p82-158 ◽

1982 ◽

Vol 60 (8) ◽

pp. 1163-1167

Author(s):

Gerry McKeon

Keyword(s):

Inelastic Scattering ◽

Quantum Chromodynamics ◽

Deep Inelastic Scattering ◽

Heavy Quarks ◽

Second Order ◽

Leading Order ◽

Mass Effects ◽

Quark Masses ◽

B Quarks

Recently Altarelli, Curci, Martinelli, and Petrarca have calculated the second order corrections induced by quantum chromodynamics to the effective weak Hamiltonian in Δc = 1 processes. We extend their analysis by including the effects of the heavy t and b quarks. The technique used is that first introduced by Witten to study the effects of heavy quarks in deep inelastic scattering and used by Gilman and Wise and Guberina and Peccei to discuss how quark masses alter the effective weak Hamiltonian to leading order in [Formula: see text] processes.

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Lepton mass effects in semileptonic B(c,s) meson decays using the WSB, ISGW, ISGW2, HEAVY QUARKS and LCSR models

Nuclear and Particle Physics Proceedings ◽

10.1016/j.nuclphysbps.2015.10.110 ◽

2015 ◽

Vol 267-269 ◽

pp. 236-238

Author(s):

C.E. Vera ◽

H. Triviño ◽

J.H. Muñoz

Keyword(s):

Heavy Quarks ◽

Meson Decays ◽

Mass Effects

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Strange and heavy quarks in soft processes at high energies: Total cross sections and inclusive production

Physical Review D ◽

10.1103/physrevd.42.3045 ◽

1990 ◽

Vol 42 (9) ◽

pp. 3045-3051 ◽

Cited By ~ 16

Author(s):

V. V. Anisovich ◽

M. G. Huber ◽

M. N. Kobrinsky ◽

B. Ch. Metsch

Keyword(s):

Cross Sections ◽

Heavy Quarks ◽

Inclusive Production ◽

Total Cross Sections ◽

High Energies ◽

Soft Processes

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Valence electron spectroscopy of inhomogeneous media

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100130389 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1150-1151

Author(s):

A. Howie ◽

D.W. McComb

Keyword(s):

Specific Gravity ◽

Loss Function ◽

Electron Spectroscopy ◽

Valence Electron ◽

Peak Height ◽

Loss Functions ◽

Loss Peak ◽

High Energies ◽

Valence Electron Density ◽

Electron Microscopist

The bulk loss function Im(-l/ε (ω)), a well established tool for the interpretation of valence loss spectra, is being progressively adapted to the wide variety of inhomogeneous samples of interest to the electron microscopist. Proportionality between n, the local valence electron density, and ε-1 (Sellmeyer's equation) has sometimes been assumed but may not be valid even in homogeneous samples. Figs. 1 and 2 show the experimentally measured bulk loss functions for three pure silicates of different specific gravity ρ - quartz (ρ = 2.66), coesite (ρ = 2.93) and a zeolite (ρ = 1.79). Clearly, despite the substantial differences in density, the shift of the prominent loss peak is very small and far less than that predicted by scaling e for quartz with Sellmeyer's equation or even the somewhat smaller shift given by the Clausius-Mossotti (CM) relation which assumes proportionality between n (or ρ in this case) and (ε - 1)/(ε + 2). Both theories overestimate the rise in the peak height for coesite and underestimate the increase at high energies.

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