Details

Autor(en) / Beteiligte

• Aubert, B.
• Bona, M.
• Boutigny, D.
• Karyotakis, Y.
• Lees, J. P.
• Poireau, V.
• Prudent, X.
• Tisserand, V.
• Zghiche, A.
• Grauges, E.
• Palano, A.
• Chen, J. C.
• Qi, N. D.
• Rong, G.
• Wang, P.
• Zhu, Y. S.
• Eigen, G.
• Ofte, I.
• Stugu, B.
• Abrams, G. S.

Titel

Measurements of CP-Violating Asymmetries in B{sup 0}{yields}a{sub 1}{sup {+-}}(1260){pi}{sup {+-}} Decays

Ist Teil von

• Physical review letters, 2007-05, Vol.98 (18)

Ort / Verlag

United States

Erscheinungsjahr

2007

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We present measurements of CP-violating asymmetries in the decay B{sup 0}{yields}a{sub 1}{sup {+-}}(1260){pi}{sup {+-}} with a{sub 1}{sup {+-}}(1260){yields}{pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {+-}}. The data sample corresponds to 384x10{sup 6} BB pairs collected with the BABAR detector at the PEP-II asymmetric B factory at SLAC. We measure the CP-violating asymmetry A{sub CP}{sup a{sub 1}}{sup {pi}}=-0.07{+-}0.07{+-}0.02, the mixing-induced CP violation parameter S{sub a{sub 1}}{sub {pi}}=0.37{+-}0.21{+-}0.07, the direct CP violation parameter C{sub a{sub 1}}{sub {pi}}=-0.10{+-}0.15{+-}0.09, and the parameters {delta}C{sub a{sub 1}}{sub {pi}}=0.26{+-}0.15{+-}0.07 and {delta}S{sub a{sub 1}}{sub {pi}}=-0.14{+-}0.21{+-}0.06. From these measured quantities we determine the angle {alpha}{sub eff}=78.6 deg. {+-}7.3 deg.