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Title: Improving the measurement of the CKM phase Φ 2 = α in B → ππ and B → ρρ decays

CP-violating asymmetries in B →ππ and B →ρρ decays can help specify the weak phase Φ 2=α of the Cabibbo–Kobayashi–Maskawa (CKM) matrix. We discuss the impact of improved measurements of these processes such as will be available in the near future, finding special value in better measurement of the time-dependent CP violation parameter S00 in B 0→π 0π 0 and B 0→ρ 0ρ 0. Reducing the errors on B →ρρ measurements by a factor of two can potentially lead to an error in Φ 2=α just above 2°, at which level the ρ width and isospin-breaking corrections must be considered.
Authors:
 [1] ;  [2]
  1. Technion, Haifa (Israel). Physics Department
  2. Univ. of Chicago, IL (United States). Enrico Fermi Institute and Department of Physics
Publication Date:
Grant/Contract Number:
FG02-13ER41958; SC0009924; FG02-13ER41598
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 763; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Univ. of Chicago, IL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1402516
Alternate Identifier(s):
OSTI ID: 1465709

Gronau, Michael, and Rosner, Jonathan L. Improving the measurement of the CKM phase Φ2 = α in B → ππ and B → ρρ decays. United States: N. p., Web. doi:10.1016/j.physletb.2016.10.041.
Gronau, Michael, & Rosner, Jonathan L. Improving the measurement of the CKM phase Φ2 = α in B → ππ and B → ρρ decays. United States. doi:10.1016/j.physletb.2016.10.041.
Gronau, Michael, and Rosner, Jonathan L. 2016. "Improving the measurement of the CKM phase Φ2 = α in B → ππ and B → ρρ decays". United States. doi:10.1016/j.physletb.2016.10.041.
@article{osti_1402516,
title = {Improving the measurement of the CKM phase Φ2 = α in B → ππ and B → ρρ decays},
author = {Gronau, Michael and Rosner, Jonathan L.},
abstractNote = {CP-violating asymmetries in B →ππ and B →ρρ decays can help specify the weak phase Φ2=α of the Cabibbo–Kobayashi–Maskawa (CKM) matrix. We discuss the impact of improved measurements of these processes such as will be available in the near future, finding special value in better measurement of the time-dependent CP violation parameter S00 in B0→π0π0 and B0→ρ0ρ0. Reducing the errors on B →ρρ measurements by a factor of two can potentially lead to an error in Φ2=α just above 2°, at which level the ρ width and isospin-breaking corrections must be considered.},
doi = {10.1016/j.physletb.2016.10.041},
journal = {Physics Letters. Section B},
number = C,
volume = 763,
place = {United States},
year = {2016},
month = {10}
}