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Title: Measurement of CP Asymmetry in a Time-Dependent Dalitz Analysis of B{sup 0}{yields}({rho}{pi}){sup 0} and a Constraint on the Quark Mixing Matrix Angle {phi}{sub 2}

Abstract

We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B{sup 0}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0} decays based on a 414 fb{sup -1} data sample containing 449x10{sup 6}BB pairs. The data was collected on the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric energy e{sup +}e{sup -} collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle {phi}{sub 2}, 68 deg. <{phi}{sub 2}<95 deg. as the 68.3% confidence interval for the {phi}{sub 2} solution consistent with the standard model (SM). A large SM-disfavored region also remains.

Authors:
; ; ; ; ;  [1]; ; ; ; ; ; ; ;  [2]; ; ;  [3]; ; ;  [4]
  1. Department of Physics, University of Tokyo, Tokyo (Japan)
  2. Department of Physics, National Taiwan University, Taipei (China)
  3. Tokyo Institute of Technology, Tokyo (Japan)
  4. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan) (and others)
Publication Date:
OSTI Identifier:
20951440
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 22; Other Information: DOI: 10.1103/PhysRevLett.98.221602; (c) 2007 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; ASYMMETRY; B NEUTRAL MESONS; CP INVARIANCE; DALITZ PLOT; ISOSPIN; MATHEMATICAL SOLUTIONS; PARTICLE DECAY; PARTICLE PRODUCTION; PIONS MINUS; PIONS NEUTRAL; PIONS PLUS; QUARKS; RESONANCE; STANDARD MODEL; TIME DEPENDENCE

Citation Formats

Kusaka, A., Aihara, H., Hastings, N. C., Ishikawa, A., Iwasaki, M., Kakuno, H., Wang, C. C., Chang, P., Chao, Y., Chen, K.-F., Hou, W.-S., Hsiung, Y. B., Lin, S.-W., Wang, M.-Z., Ishino, H., Khan, H. R., Watanabe, Y., Abe, K., Adachi, I., and Dragic, J. Measurement of CP Asymmetry in a Time-Dependent Dalitz Analysis of B{sup 0}{yields}({rho}{pi}){sup 0} and a Constraint on the Quark Mixing Matrix Angle {phi}{sub 2}. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.221602.
Kusaka, A., Aihara, H., Hastings, N. C., Ishikawa, A., Iwasaki, M., Kakuno, H., Wang, C. C., Chang, P., Chao, Y., Chen, K.-F., Hou, W.-S., Hsiung, Y. B., Lin, S.-W., Wang, M.-Z., Ishino, H., Khan, H. R., Watanabe, Y., Abe, K., Adachi, I., & Dragic, J. Measurement of CP Asymmetry in a Time-Dependent Dalitz Analysis of B{sup 0}{yields}({rho}{pi}){sup 0} and a Constraint on the Quark Mixing Matrix Angle {phi}{sub 2}. United States. doi:10.1103/PHYSREVLETT.98.221602.
Kusaka, A., Aihara, H., Hastings, N. C., Ishikawa, A., Iwasaki, M., Kakuno, H., Wang, C. C., Chang, P., Chao, Y., Chen, K.-F., Hou, W.-S., Hsiung, Y. B., Lin, S.-W., Wang, M.-Z., Ishino, H., Khan, H. R., Watanabe, Y., Abe, K., Adachi, I., and Dragic, J. Fri . "Measurement of CP Asymmetry in a Time-Dependent Dalitz Analysis of B{sup 0}{yields}({rho}{pi}){sup 0} and a Constraint on the Quark Mixing Matrix Angle {phi}{sub 2}". United States. doi:10.1103/PHYSREVLETT.98.221602.
@article{osti_20951440,
title = {Measurement of CP Asymmetry in a Time-Dependent Dalitz Analysis of B{sup 0}{yields}({rho}{pi}){sup 0} and a Constraint on the Quark Mixing Matrix Angle {phi}{sub 2}},
author = {Kusaka, A. and Aihara, H. and Hastings, N. C. and Ishikawa, A. and Iwasaki, M. and Kakuno, H. and Wang, C. C. and Chang, P. and Chao, Y. and Chen, K.-F. and Hou, W.-S. and Hsiung, Y. B. and Lin, S.-W. and Wang, M.-Z. and Ishino, H. and Khan, H. R. and Watanabe, Y. and Abe, K. and Adachi, I. and Dragic, J.},
abstractNote = {We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B{sup 0}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0} decays based on a 414 fb{sup -1} data sample containing 449x10{sup 6}BB pairs. The data was collected on the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric energy e{sup +}e{sup -} collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle {phi}{sub 2}, 68 deg. <{phi}{sub 2}<95 deg. as the 68.3% confidence interval for the {phi}{sub 2} solution consistent with the standard model (SM). A large SM-disfavored region also remains.},
doi = {10.1103/PHYSREVLETT.98.221602},
journal = {Physical Review Letters},
number = 22,
volume = 98,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2007},
month = {Fri Jun 01 00:00:00 EDT 2007}
}