TY  - JOUR
AU  - BABAR Collaboration (Lees, J. P. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Villanueva-Perez, P.
PY  - 2015
DA  - 2015//
TI  - Search for long-lived particles in e(+)e(-) collisions
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 171801
EP  - 7pp
VL  - 114
IS  - 17
PB  - Amer Physical Soc
AB  - We present a search for a neutral, long-lived particle L that is produced in e(+)e(-)collisions and decays at a significant distance from the e(+)e(-) interaction point into various flavor combinations of two oppositely charged tracks. The analysis uses an e(+)e(-) data sample with a luminosity of 489.1 fb(-1) collected by the BABAR detector at the Upsilon(4S), Upsilon(3S), and Upsilon(2S) resonances and just below the Upsilon(4S). Fitting the two-track mass distribution in search of a signal peak, we do not observe a significant signal, and set 90% confidence level upper limits on the product of the L production cross section, branching fraction, and reconstruction efficiency for six possible two-body L decay modes as a function of the L mass. The efficiency is given for each final state as a function of the mass, lifetime, and transverse momentum of the candidate, allowing application of the upper limits to any production model. In addition, upper limits are provided on the branching fraction B(B -> XsL), where X-s is a strange hadronic system.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1502.02580
UR  - https://doi.org/10.1103/PhysRevLett.114.171801
DO  - 10.1103/PhysRevLett.114.171801
LA  - English
N1  - WOS:000353637900003
ID  - BABARCollaborationLees_etal2015
ER  -