Improved Measurement of B^ \to\rho^ \rho^0 and Determination of the Quark-Mixing Phase Angle~\alpha

Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Tico, J Garra; Grauges, E; Lopez, L; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G; Osipenkov, I L

doi:10.1103/PhysRevLett.102.141802

Title: Improved Measurement of B^ \to\rho^ \rho^0 and Determination of the Quark-Mixing Phase Angle~\alpha

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Abstract

The authors present improved measurements of the branching fraction {Beta}, the longitudinal polarization fraction f{sub L}, and the direct CP asymmetry A{sub CP} in the B meson decay channel B{sup +} {yields} {rho}{sup +}{rho}{sup 0}. The data sample was collected with the BABAR detector at SLAC. The results are {Beta}(B{sup +} {yields} {rho}{sup +}{rho}{sup 0}) = (23.7 {+-} 1.4 {+-} 1.4) x 10{sup -6}, f{sub L} = 0.950 {+-} 0.015 {+-} 0.006, and A{sub CP} = -0.054 {+-} 0.055 {+-} 0.010, where the uncertainties are statistical and systematic, respectively. Based on these results, they perform an isospin analysis and determine the CKM weak phase angle {alpha} to be (92.4{sub -6.5}{sup +6.0}){sup 0}.

Authors:: Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Tico, J Garra; Grauges, E; Lopez, L; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G more »« less

Publication Date:: Tue Jul 14 00:00:00 EDT 2009

Research Org.:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 946714

Report Number(s):: SLAC-PUB-13452
Journal ID: ISSN 0031-9007; PRLTAO; arXiv:0901.3522; TRN: US0901151

DOE Contract Number:: AC02-76SF00515

Resource Type:: Journal Article

Journal Name:: Phys.Rev.Lett.102:141802,2009

Additional Journal Information:: Journal Name: Phys.Rev.Lett.102:141802,2009; Journal ID: ISSN 0031-9007

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; ASYMMETRY; B MESONS; DECAY; ISOSPIN; POLARIZATION; STANFORD LINEAR ACCELERATOR CENTER; Experiment-HEP,HEPEX

Citation Formats


                    Aubert, B, Karyotakis, Y, Lees, J P, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Tico, J Garra, Grauges, E, Lopez, L, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, D N, Kerth, L T, Kolomensky, Yu G, Lynch, G, Osipenkov, I L, and /Annecy, LAPP /Barcelona U., ECM /INFN, Bari /Bari U. /Bergen U. /LBL, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. Improved Measurement of B^ \to\rho^ \rho^0 and Determination of the Quark-Mixing Phase Angle~\alpha.  United States: N. p., 2009. 
        Web.  doi:10.1103/PhysRevLett.102.141802.

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                    Aubert, B, Karyotakis, Y, Lees, J P, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Tico, J Garra, Grauges, E, Lopez, L, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, D N, Kerth, L T, Kolomensky, Yu G, Lynch, G, Osipenkov, I L, & /Annecy, LAPP /Barcelona U., ECM /INFN, Bari /Bari U. /Bergen U. /LBL, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. Improved Measurement of B^ \to\rho^ \rho^0 and Determination of the Quark-Mixing Phase Angle~\alpha.  United States.  https://doi.org/10.1103/PhysRevLett.102.141802

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                    Aubert, B, Karyotakis, Y, Lees, J P, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Tico, J Garra, Grauges, E, Lopez, L, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, D N, Kerth, L T, Kolomensky, Yu G, Lynch, G, Osipenkov, I L, and /Annecy, LAPP /Barcelona U., ECM /INFN, Bari /Bari U. /Bergen U. /LBL, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. 2009.  
        "Improved Measurement of B^ \to\rho^ \rho^0 and Determination of the Quark-Mixing Phase Angle~\alpha".  United States.  https://doi.org/10.1103/PhysRevLett.102.141802.  https://www.osti.gov/servlets/purl/946714.

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@article{osti_946714,

  title        = {Improved Measurement of B^ \to\rho^ \rho^0 and Determination of the Quark-Mixing Phase Angle~\alpha},

  author       = {Aubert, B and Karyotakis, Y and Lees, J P and Poireau, V and Prencipe, E and Prudent, X and Tisserand, V and Tico, J Garra and Grauges, E and Lopez, L and Palano, A and Pappagallo, M and Eigen, G and Stugu, B and Sun, L and Battaglia, M and Brown, D N and Kerth, L T and Kolomensky, Yu G and Lynch, G and Osipenkov, I L and /Annecy, LAPP /Barcelona U., ECM /INFN, Bari /Bari U. /Bergen U. /LBL, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U.},

  abstractNote = {The authors present improved measurements of the branching fraction {Beta}, the longitudinal polarization fraction f{sub L}, and the direct CP asymmetry A{sub CP} in the B meson decay channel B{sup +} {yields} {rho}{sup +}{rho}{sup 0}. The data sample was collected with the BABAR detector at SLAC. The results are {Beta}(B{sup +} {yields} {rho}{sup +}{rho}{sup 0}) = (23.7 {+-} 1.4 {+-} 1.4) x 10{sup -6}, f{sub L} = 0.950 {+-} 0.015 {+-} 0.006, and A{sub CP} = -0.054 {+-} 0.055 {+-} 0.010, where the uncertainties are statistical and systematic, respectively. Based on these results, they perform an isospin analysis and determine the CKM weak phase angle {alpha} to be (92.4{sub -6.5}{sup +6.0}){sup 0}.},

  doi          = {10.1103/PhysRevLett.102.141802},

  url          = {https://www.osti.gov/biblio/946714},
  journal      = {Phys.Rev.Lett.102:141802,2009},

  issn         = {0031-9007},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Jul 14 00:00:00 EDT 2009},

  month        = {Tue Jul 14 00:00:00 EDT 2009}

}

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