scholarly journals Direct CP Violation from Isospin Symmetry Breaking Effects for the Decay Process B-s→P(V)π0 in PQCD

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Gang Lü ◽  
Qin-Qin Zhi
Keyword(s):  
Cp Violation ◽  
Symmetry Breaking ◽  
Quark Mass ◽  
Mass Difference ◽  
Electroweak Interaction ◽  
Decay Process ◽  
Isospin Symmetry ◽  
Leading Order ◽  
Factorization Approach ◽  
Isospin Symmetry Breaking

We investigate the direct CP violation for the decay process of B-s→P(V)π0 (P,V refer to the pseudoscalar meson and vector meson, resp.) via isospin symmetry breaking effects from the π0-η-η′ mixing mechanism in PQCD factorization approach. Isospin symmetry breaking arises from the electroweak interaction and the u-d quark mass difference by the strong interaction, which are known to be tiny. However, we find that isospin symmetry breaking at the leading order shifts the CP violation due to the new strong phases.

Search for up-down quark mass differences via isospin symmetry breaking

2003 ◽  
Vol 50 (2) ◽  
pp. 605-614
Author(s):  
H Machner ◽  
S Abdel-Samad ◽  
J Bojowald ◽  
A Budzanowski ◽  
A Chatterjee ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Quark Mass ◽  
Isospin Symmetry ◽  
Down Quark ◽  
Isospin Symmetry Breaking

scholarly journals SPECTRUM AND DECAYS OF HADRONIC ATOMS

2005 ◽  
Vol 20 (02n03) ◽  
pp. 358-364 ◽  
Author(s):  
JULIA SCHWEIZER
Keyword(s):  
Field Theory ◽  
Symmetry Breaking ◽  
Effective Field Theory ◽  
Ground State ◽  
Effective Field ◽  
Isospin Symmetry ◽  
Leading Order ◽  
Isospin Symmetry Breaking ◽  
Hadronic Atoms

We describe the spectra and decays of π+π-and π±K∓atoms within a non-relativistic effective field theory. The evaluations of the energy shifts and widths are performed at next-to-leading order in isospin symmetry breaking. The prediction for the lifetime of the π±K∓atom in its ground-state yields τ10=(3.7±0.4)·10-15s .

ftvalue of the0+→0+β+decay ofAr32: A measurement of isospin symmetry breaking in a superallowed decay

2008 ◽  
Vol 77 (6) ◽  
Author(s):  
M. Bhattacharya ◽  
D. Melconian ◽  
A. Komives ◽  
S. Triambak ◽  
A. García ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Isospin Symmetry ◽  
Β Decay ◽  
Isospin Symmetry Breaking

SUBSTRUCTURE EFFECT ON ρ-ω MIXING IN CHARGE-SYMMETRY VIOLATION

1992 ◽  
Vol 07 (32) ◽  
pp. 3037-3043 ◽  
Author(s):  
T. GOLDMAN ◽  
J.A. HENDERSON ◽  
A.W. THOMAS
Keyword(s):  
Symmetry Breaking ◽  
Quark Model ◽  
Quark Mass ◽  
Mass Shell ◽  
Mass Difference ◽  
Charge Symmetry Breaking ◽  
Symmetry Violation ◽  
Charge Symmetry ◽  
A Charge ◽  
Simple Quark Model

In generating a charge-symmetry breaking potential using ρ-ω mixing it is usually assumed that the mixing amplitude is constant (at the on-mass-shell value). Since the exchanged meson is actually far off-shell one must question the validity of this assumption. By constructing a simple quark model in which the mixing is generated by the u-d quark mass difference, we find that the assumption seems to be a very poor one.

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