Study of High-multiplicity 3-prong and 5-prong Tau Decays at BaBar

Lees, J.P

SLAC National Accelerator Laboratory

关键词: Decay;    Luminosity;    Hepex;    Storage Rings;    Second-Class Currents;   

DOI  :  10.2172/1042688
RP-ID  :  SLAC-PUB-15047
RP-ID  :  AC02-76SF00515
RP-ID  :  1042688

美国|英语

来源: UNT Digital Library

【 摘 要 】

We present measurements of the branching fractions of 3-prong and 5-prong {tau} decay modes using a sample of 430 million {tau} lepton pairs, corresponding to an integrated luminosity of 468 fb{sup -1}, collected with the BABAR detector at the PEP-II asymmetric energy e{sup +}e{sup -} storage rings. The {tau}{sup -} {yields} (3{pi}){sup -} {eta}{nu}{sub {tau}}, {tau}{sup -} {yields} (3{pi}){sup -} {yields} {omega}{nu}{sub {tau}} and {tau}{sup -} {yields} {pi}{sup -} f{sub 1}(1285){nu}{sub {tau}} branching fractions are presented as well as a new limit on the branching fraction of the isospin-forbidden, second-class current {tau}{sup -} {yields} {pi}{sup -} {eta}{prime}(958){nu}{sub {tau}} decay. We find no evidence for charged kaons in these decay modes and place the first upper limits on their branching fractions.