scholarly journals Global analysis of charmless B decays into two vector mesons in soft-collinear effective theory

2017 ◽  
Vol 96 (7) ◽  
Author(s):  
Chao Wang ◽  
Si-Hong Zhou ◽  
Ying Li ◽  
Cai-Dian Lü
Keyword(s):  
Global Analysis ◽  
Effective Theory ◽  
Vector Mesons ◽  
B Decays ◽  
Soft Collinear Effective Theory ◽  
Charmless B Decays

Charmless B decays to final states with radially excited vector mesons

2002 ◽  
Vol 540 (1-2) ◽  
pp. 97-103 ◽  
Author(s):  
Alakabha Datta ◽  
Harry J. Lipkin ◽  
Patrick J. O'Donnell
Keyword(s):  
Final States ◽  
Vector Mesons ◽  
B Decays ◽  
Charmless B Decays

scholarly journals THE CKM MATRIX AND CP VIOLATION

2005 ◽  
Vol 20 (22) ◽  
pp. 5105-5118 ◽  
Author(s):  
ZOLTAN LIGETI
Keyword(s):  
Cp Violation ◽  
New Physics ◽  
Vector Mesons ◽  
B Decays ◽  
Ckm Matrix ◽  
Charmless B Decays ◽  
The Status ◽  
Recent Developments ◽  
Nonleptonic Decays ◽  
Cp Asymmetries

The status of CP violation and the CKM matrix is reviewed. Direct CP violation in B decay has been established and the measurement of sin 2β in ψK modes reached 5% accuracy. I discuss the implications of these, and of the possible deviations of the CP asymmetries in b → s modes from that in ψK. The first meaningful measurements of α and γ are explained, together with their significance for constraining both the SM and new physics in [Formula: see text] mixing. I also discuss implications of recent developments in the theory of nonleptonic decays for B → πK rates and CP asymmetries, and for the polarization in charmless B decays to two vector mesons.

Effective Field Theory in Particle Physics and Cosmology

2020 ◽  
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Particle Physics ◽  
Large Scale ◽  
Effective Field ◽  
Effective Theory ◽  
Soft Collinear Effective Theory ◽  
Multiple Length Scales ◽  
Cosmological Observations ◽  
Standard Models

Effective field theory (EFT) is a general method for describing quantum systems with multiple-length scales in a tractable fashion. It allows us to perform precise calculations in established models (such as the standard models of particle physics and cosmology), as well as to concisely parametrize possible effects from physics beyond the standard models. EFTs have become key tools in the theoretical analysis of particle physics experiments and cosmological observations, despite being absent from many textbooks. This volume aims to provide a comprehensive introduction to many of the EFTs in use today, and covers topics that include large-scale structure, WIMPs, dark matter, heavy quark effective theory, flavour physics, soft-collinear effective theory, and more.

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 Charmless B Decays to Baryons

1988 ◽  
Vol 535 (1 International) ◽  
pp. 352-357
Author(s):  
M. GRONAU
Keyword(s):  
B Decays ◽  
Charmless B Decays
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