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Title: Study of B{sub s}{yields}{pi}{rho} decays in the perturbative QCD approach

Abstract

In this note, we calculate the branching ratio and CP asymmetry parameters of B{sub s}{yields}{pi}{rho} in the framework of perturbative QCD approach based on k{sub T} factorization. This decay can occur only via annihilation diagrams in the standard model. We find that (a) the charge averaged Br(B{sub s}{yields}{pi}{sup +}{rho}{sup -}+{pi}{sup -}{rho}{sup +}) is about (9-12)x10{sup -7}; Br(B{sub s}{yields}{pi}{sup 0}{rho}{sup 0}){approx_equal}4x10{sup -7}; and (b) there are sizable CP asymmetries in the processes, which can be tested in the near future Large Hadron Collider beauty experiments (LHC-b) at CERN.

Authors:
; ;  [1];  [2];  [3];  [4]
  1. Institute of High Energy Physics, P.O.Box 918(4), Beijing 100049 (China)
  2. (China)
  3. (World Laboratory), P.O. Box 8730, Beijing 100080 (China)
  4. (4), Beijing 100049 (China)
Publication Date:
OSTI Identifier:
20774651
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 73; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevD.73.017501; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; ASYMMETRY; B S MESONS; BRANCHING RATIO; CERN LHC; FACTORIZATION; FEYNMAN DIAGRAM; PARTICLE DECAY; PIONS MINUS; PIONS PLUS; QUANTUM CHROMODYNAMICS; RHO-770 MESONS; STANDARD MODEL

Citation Formats

Yu Xianqiao, Li Ying, Lue Caidian, Graduate School of the Chinese Academy of Sciences, Beijing 100049, CCAST, and Institute of High Energy Physics, P.O.Box 918. Study of B{sub s}{yields}{pi}{rho} decays in the perturbative QCD approach. United States: N. p., 2006. Web. doi:10.1103/PhysRevD.73.017501.
Yu Xianqiao, Li Ying, Lue Caidian, Graduate School of the Chinese Academy of Sciences, Beijing 100049, CCAST, & Institute of High Energy Physics, P.O.Box 918. Study of B{sub s}{yields}{pi}{rho} decays in the perturbative QCD approach. United States. doi:10.1103/PhysRevD.73.017501.
Yu Xianqiao, Li Ying, Lue Caidian, Graduate School of the Chinese Academy of Sciences, Beijing 100049, CCAST, and Institute of High Energy Physics, P.O.Box 918. Sun . "Study of B{sub s}{yields}{pi}{rho} decays in the perturbative QCD approach". United States. doi:10.1103/PhysRevD.73.017501.
@article{osti_20774651,
title = {Study of B{sub s}{yields}{pi}{rho} decays in the perturbative QCD approach},
author = {Yu Xianqiao and Li Ying and Lue Caidian and Graduate School of the Chinese Academy of Sciences, Beijing 100049 and CCAST and Institute of High Energy Physics, P.O.Box 918},
abstractNote = {In this note, we calculate the branching ratio and CP asymmetry parameters of B{sub s}{yields}{pi}{rho} in the framework of perturbative QCD approach based on k{sub T} factorization. This decay can occur only via annihilation diagrams in the standard model. We find that (a) the charge averaged Br(B{sub s}{yields}{pi}{sup +}{rho}{sup -}+{pi}{sup -}{rho}{sup +}) is about (9-12)x10{sup -7}; Br(B{sub s}{yields}{pi}{sup 0}{rho}{sup 0}){approx_equal}4x10{sup -7}; and (b) there are sizable CP asymmetries in the processes, which can be tested in the near future Large Hadron Collider beauty experiments (LHC-b) at CERN.},
doi = {10.1103/PhysRevD.73.017501},
journal = {Physical Review. D, Particles Fields},
number = 1,
volume = 73,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}
  • In the framework of perturbative QCD approach, we calculate the branching ratio and CP asymmetry for B{sub s}{sup 0}(B{sub s}){yields}{pi}{sup {+-}}K{sup {+-}} and B{sub s}(B{sub s}){yields}{pi}{sup 0}K{sup 0}(K{sup 0}) decays. Besides the usual factorizable diagrams, both nonfactorizable and annihilation type contributions are taken into account. We find that (a) the branching ratio of B{sub s}{sup 0}(B{sub s}){yields}{pi}{sup {+-}}K{sup {+-}} is about (6-10)x10{sup -6}; Br(B{sub s}(B{sub s}){yields}{pi}{sup 0}K{sup 0}(K{sup 0})) about (1-3)x10{sup -7}; and (b) there are large CP asymmetries in the two processes, which can be tested in the near future LHC-b experiments at CERN and BTeV experiments at Fermilab.
  • No abstract prepared.
  • We calculate the branching ratios and CP-violating asymmetries for B{sub s}{sup 0}{yields}{pi}{sup 0}{eta}{sup (')} decays in the perturbative QCD (pQCD) factorization approach here. We not only calculate the usual factorizable contributions, but also evaluate the nonfactorizable and annihilation type contributions. The pQCD predictions for the CP-averaged branching ratios are BR(B{sub s}{sup 0}{yields}{pi}{sup 0}{eta}){approx_equal}0.86x10{sup -7} and BR(B{sub s}{sup 0}{yields}{pi}{sup 0}{eta}{sup '}){approx_equal}1.86x10{sup -7}. The pQCD predictions for the CP-violating asymmetries are A{sub CP}{sup dir}({pi}{sup 0}{eta}){approx}-4.5%, A{sub CP}{sup dir}({pi}{sup 0}{eta}{sup '}){approx}-9.1%, A{sub CP}{sup mix}({pi}{sup 0}{eta}){approx}-0.2%, and A{sub CP}{sup mix}({pi}{sup 0}{eta}{sup '}){approx}27% but with large errors. The above pQCD predictions can be tested inmore » the forthcoming LHC-b experiments at CERN.« less
  • Two-body charmed decays B{sub (s)}{yields}D{sub (s)}P, D{sub (s)}*P, D{sub (s)}V, and D{sub (s)}*V, where P and V denote the light pseudoscalar meson and vector meson, respectively, are analyzed in the perturbative QCD (pQCD) approach. Using the experimental data of six B{yields}DP channels, we test the D meson wave function by {chi}{sup 2} fit. We give the branching ratios of all the charmed B decay channels, most of which agree with experiments amazingly well. The predicted B{sub s} decays can be confronted with the future experimental data. By straightforward calculations, our pQCD approach gives the right relative strong phase of a{submore » 2}/a{sub 1} that agrees with experiments. We also predict the percentage of transverse polarizations in B{sub (s)}{yields}D*V decay channels.« less
  • The B{yields}K*{rho}, K*{omega} decays are useful to determine the Cabbibo-Kobayashi-Maskawa (CKM) angle {phi}{sub 3}={gamma}. Their polarization fractions are also interesting because of the polarization puzzle of the B{yields}{phi}K* decay. We study these decays in the perturbative QCD approach based on k{sub T} factorization. After calculating the nonfactorizable and annihilation type contributions, in addition to the conventional factorizable contributions, we find that the contributions from the annihilation diagrams are crucial. They give dominant contribution to the strong phases and suppress the longitudinal polarizations. Our results agree with the current existing data. We also predict sizable direct CP asymmetries in B{sup +}{yields}K*{supmore » +}{rho}{sup 0}, B{sup 0}{yields}K*{sup +}{rho}{sup -}, and B{sup +}{yields}K*{sup +}{omega} decays, which can be tested by the oncoming measurements in the B factory experiments.« less