The Measurement of CP Asymmetries And Branching Fractions in Neutral B Meson Decays to Charged Rhos And Pions (Kaons) With the BaBar Detector

Liu, Ran

doi:10.2172/878443

Title: The Measurement of CP Asymmetries And Branching Fractions in Neutral B Meson Decays to Charged Rhos And Pions (Kaons) With the BaBar Detector

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Abstract

The authors present measurements of branching ratios and CP-violating asymmetries for neutral B decays into quasi two-body final states dominated by the modes {rho}{sup {+-}}{pi}{sup {-+}} and {rho}{sup {+-}}K{sup {-+}}. The data set used for these measurements was recorded during the 1999-2002 period, and corresponds to a total integrated luminosity of 81.9 fb{sup -1} taken on the {Upsilon}(4S) peak, and 9.5 fb{sup -1} taken 40 MeV off-peak. From a time-dependent maximum likelihood fit they find for the branching fractions {Beta}({rho}{sup 2}{pi}{sup {-+}}) = (22.6 {+-} 1.8(stat) {+-} 2.2(syst)) x 10{sup -6}, {Beta}({rho}{sup {+-}}K{sup {-+}}) = (7.3{sub -1.2}{sup +1.3}(stat) {+-} 1.3(syst)) x 10{sup -6}. For the CP violation parameters, they measure: {Alpha}{sub CP}{sup pK} = 0.28 {+-} 0.17(stat) {+-} 0.080(syst), {Alpha}{sub CP}{sup pk} = -0.18 {+-} 0.08(stat) {+-} 0.029(syst), C{sub pk} = 0.36 {+-} 0.18(stat) {+-} 0.041(syst), S{sub pt} = 0.19 {+-} 0.24(stat) {+-} 0.031(syst), and for the remaining parameters, required to fully describe the time dependence of the B{sup 0}({bar B}{sup 0} {yields} {rho}{sup {+-}}{pi}{sup {-+}}) decays, they obtain {Delta}C{sub pn} = 0.28{sub -0.19}{sup +0.18}(stat) {+-} 0.043(syst), {Delta}S{sub pk} = 0.15 {+-} 0.25(stat) {+-} 0.025(syst).

Authors:: Liu, Ran

Publication Date:: Fri Sep 23 00:00:00 EDT 2005

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 878443

Report Number(s):: SLAC-R-779
TRN: US0805438

DOE Contract Number:: AC02-76SF00515

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B MESONS; BRANCHING RATIO; KAONS; LUMINOSITY; MAXIMUM-LIKELIHOOD FIT; PIONS; TIME DEPENDENCE; HEPEX

Citation Formats


                    Liu, Ran, and /Wisconsin U., Madison. The Measurement of CP Asymmetries And Branching Fractions in Neutral B Meson Decays to Charged Rhos And Pions (Kaons) With the BaBar Detector.  United States: N. p., 2005. 
        Web.  doi:10.2172/878443.

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                    Liu, Ran, & /Wisconsin U., Madison. The Measurement of CP Asymmetries And Branching Fractions in Neutral B Meson Decays to Charged Rhos And Pions (Kaons) With the BaBar Detector.  United States.  https://doi.org/10.2172/878443

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                    Liu, Ran, and /Wisconsin U., Madison. 2005.  
        "The Measurement of CP Asymmetries And Branching Fractions in Neutral B Meson Decays to Charged Rhos And Pions (Kaons) With the BaBar Detector".  United States.  https://doi.org/10.2172/878443.  https://www.osti.gov/servlets/purl/878443.

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@article{osti_878443,

  title        = {The Measurement of CP Asymmetries And Branching Fractions in Neutral B Meson Decays to Charged Rhos And Pions (Kaons) With the BaBar Detector},

  author       = {Liu, Ran and /Wisconsin U., Madison},

  abstractNote = {The authors present measurements of branching ratios and CP-violating asymmetries for neutral B decays into quasi two-body final states dominated by the modes {rho}{sup {+-}}{pi}{sup {-+}} and {rho}{sup {+-}}K{sup {-+}}. The data set used for these measurements was recorded during the 1999-2002 period, and corresponds to a total integrated luminosity of 81.9 fb{sup -1} taken on the {Upsilon}(4S) peak, and 9.5 fb{sup -1} taken 40 MeV off-peak. From a time-dependent maximum likelihood fit they find for the branching fractions {Beta}({rho}{sup 2}{pi}{sup {-+}}) = (22.6 {+-} 1.8(stat) {+-} 2.2(syst)) x 10{sup -6}, {Beta}({rho}{sup {+-}}K{sup {-+}}) = (7.3{sub -1.2}{sup +1.3}(stat) {+-} 1.3(syst)) x 10{sup -6}. For the CP violation parameters, they measure: {Alpha}{sub CP}{sup pK} = 0.28 {+-} 0.17(stat) {+-} 0.080(syst), {Alpha}{sub CP}{sup pk} = -0.18 {+-} 0.08(stat) {+-} 0.029(syst), C{sub pk} = 0.36 {+-} 0.18(stat) {+-} 0.041(syst), S{sub pt} = 0.19 {+-} 0.24(stat) {+-} 0.031(syst), and for the remaining parameters, required to fully describe the time dependence of the B{sup 0}({bar B}{sup 0} {yields} {rho}{sup {+-}}{pi}{sup {-+}}) decays, they obtain {Delta}C{sub pn} = 0.28{sub -0.19}{sup +0.18}(stat) {+-} 0.043(syst), {Delta}S{sub pk} = 0.15 {+-} 0.25(stat) {+-} 0.025(syst).},

  doi          = {10.2172/878443},

  url          = {https://www.osti.gov/biblio/878443},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Sep 23 00:00:00 EDT 2005},

  month        = {Fri Sep 23 00:00:00 EDT 2005}

}

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