Observation of B0 Meson Decays to a1(1260)+- pi-+

Aubert, B.

Stanford Linear Accelerator Center

关键词: Decay;    Experiment-Hep,Hepex;    Resonance Experiment-Hep,Hepex;    Mesons;    Annihilation;   

DOI  :  10.2172/878353
RP-ID  :  SLAC-PUB-11769
RP-ID  :  AC02-76SF00515
RP-ID  :  878353

美国|英语

来源: UNT Digital Library

【 摘 要 】

The authors present a measurement of the branching fraction of 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 218 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation through the {Upsilon}(4S) resonance. The authors measure the branching fraction {Beta}(B{sup 0} {yields} a{sub 1}{sup {+-}}(1260){pi}{sup {-+}}){Beta}(a{sub 1}{sup {+-}}(1260){yields} {pi}{sup {-+}}{pi}{sup {+-}}{pi}{sup {+-}})=(16.6 {+-} 1.9 {+-} 1.5) x 10{sup -6}, where the first error quoted is statistical and the second is systematic.