Improving the measurement of the CKM phase ϕ2=α in B→ππ and B→ρρ decays

Gronau, Michael; Rosner, Jonathan L.

doi:10.1016/j.physletb.2016.10.041

Title: Improving the measurement of the CKM phase ϕ2=α in B→ππ and B→ρρ decays

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Abstract

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.

Authors:: Gronau, Michael; Rosner, Jonathan L.

Publication Date:: Thu Dec 01 00:00:00 EST 2016

Research Org.:: Univ. of Chicago, IL (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1402516

Alternate Identifier(s):: OSTI ID: 1465709

Grant/Contract Number:: FG02-13ER41598; FG02-13ER41958; SC0009924

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 763 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Gronau, Michael, and Rosner, Jonathan L. Improving the measurement of the CKM phase ϕ2=α in B→ππ and B→ρρ decays.  Netherlands: N. p., 2016. 
Web.  doi:10.1016/j.physletb.2016.10.041.

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                    Gronau, Michael, & Rosner, Jonathan L. Improving the measurement of the CKM phase ϕ2=α in B→ππ and B→ρρ decays.  Netherlands.  https://doi.org/10.1016/j.physletb.2016.10.041

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                    Gronau, Michael, and Rosner, Jonathan L. Thu .  
"Improving the measurement of the CKM phase ϕ2=α in B→ππ and B→ρρ decays".  Netherlands.  https://doi.org/10.1016/j.physletb.2016.10.041.

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@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 B},

  number       = C,

  volume       = 763,

  place        = {Netherlands},

  year         = {Thu Dec 01 00:00:00 EST 2016},

  month        = {Thu Dec 01 00:00:00 EST 2016}

}

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