A precise determination of the effective B s 0→K +K - lifetime can be used to constrain contributions from physics beyond the Standard Model in the Bs0 meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0 fb -1 of data recorded by the LHCb experiment, the effective B s 0→K +K - lifetime is measured as 1.455±0.046(stat.)±0.006(syst.)ps. © 2012 CERN

Aaij, R., Abellan Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2012). Measurement of the effective B s 0→K +K - lifetime. PHYSICS LETTERS. SECTION B, 716(3-5), 393-400 [10.1016/j.physletb.2012.08.033].

Measurement of the effective B s 0→K +K - lifetime

CALVI, MARTA;KUCHARCZYK, MARCIN;Martinelli, M;PEREGO, DAVIDE LUIGI;PESSINA, GIANLUIGI EZIO;
2012

Abstract

A precise determination of the effective B s 0→K +K - lifetime can be used to constrain contributions from physics beyond the Standard Model in the Bs0 meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0 fb -1 of data recorded by the LHCb experiment, the effective B s 0→K +K - lifetime is measured as 1.455±0.046(stat.)±0.006(syst.)ps. © 2012 CERN
Articolo in rivista - Articolo scientifico
B physics; Flavour physics; Lifetime; Nuclear and High Energy Physics
English
2012
716
3-5
393
400
none
Aaij, R., Abellan Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2012). Measurement of the effective B s 0→K +K - lifetime. PHYSICS LETTERS. SECTION B, 716(3-5), 393-400 [10.1016/j.physletb.2012.08.033].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/68669
Citazioni
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 17
Social impact