Measurement of the <i>B</i> <i><sub>s</sub></i> <SUP>0</SUP> →aEuroparts per thousand<i>I•I•</i> branching fraction and search for the decay <i>B</i> <SUP>0</SUP> → φφ



Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S
et al (show 718 more authors) (2015) Measurement of the <i>B</i> <i><sub>s</sub></i> <SUP>0</SUP> →aEuroparts per thousand<i>I•I•</i> branching fraction and search for the decay <i>B</i> <SUP>0</SUP> → φφ. JOURNAL OF HIGH ENERGY PHYSICS, 10 (10). 053-.

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Abstract

Using a dataset corresponding to an integrated luminosity of 3.0 fb$^{-1}$ collected in $pp$ collisions at centre-of-mass energies of 7 and 8 TeV, the $B_s^0 \to \phi \phi$ branching fraction is measured to be \[ \mathcal{B}(B_s^0 \to \phi \phi) = ( 1.84 \pm 0.05 (\text{stat}) \pm 0.07 (\text{syst}) \pm 0.11 (f_s/f_d) \pm 0.12 (\text{norm}) ) \times 10^{-5}, \] where $f_s/f_d$ represents the ratio of the $B_s^0$ to $B^0$ production cross-sections, and the $B^0 \to \phi K^*(892)^0$ decay mode is used for normalization. This is the most precise measurement of this branching fraction to date, representing a factor five reduction in the statistical uncertainty compared with the previous best measurement. A search for the decay $B^0 \to \phi \phi$ is also made. No signal is observed, and an upper limit on the branching fraction is set as \[ \mathcal{B}(B^0 \to \phi \phi) < 2.8 \times 10^{-8} \] at 90% confidence level. This is a factor of seven improvement compared to the previous best limit.

Item Type: Article
Uncontrolled Keywords: Hadron-Hadron Scattering, Branching fraction, B physics, Flavor physics
Depositing User: Symplectic Admin
Date Deposited: 08 Jul 2016 09:13
Last Modified: 05 Oct 2023 11:09
DOI: 10.1007/JHEP10(2015)053
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3002192