Measurements of branching fractions and CP asymmetries and studies of angular distributions for B to phi phi K decays

TL;DR

This paper reports measurements of branching fractions, CP asymmetries, and angular distributions in B to phi phi K decays using a large data sample, providing insights into decay dynamics and CP violation.

Contribution

First comprehensive measurement of branching fractions, CP asymmetries, and angular distributions for B to phi phi K decays in specific invariant mass regions.

Findings

Branching fractions measured as (5.6 +/- 0.5 +/- 0.3) x 10^-6 and (4.5 +/- 0.8 +/- 0.3) x 10^-6.

CP asymmetries found to be approximately -0.10 and 0.09 in different regions.

Angular distributions support specific quantum number assignments for the decay.

Abstract

We present branching fraction and CP asymmetry measurements as well as angular studies of B to phi phi K decays using 464 x 10^6 BBbar events collected by the BaBar experiment. The branching fractions are measured in the phi phi invariant mass range below the eta_c resonance (m_phiphi <2.85 GeV). We find B(B+ to phi phi K+) = (5.6 +/- 0.5 +/- 0.3) x 10^-6 and B(B0 to phi phi K0) = (4.5 +/- 0.8 +/- 0.3) x 10^-6, where the first uncertaintiy is statistical and the second systematic. The measured direct CP asymmetries for the B+- decays are A_CP = -0.10 +/- 0.08 +/- 0.02 below the eta_c threshold and A_CP = 0.09 +/- 0.10 +?- 0.02 in the eta_c resonance region (m_phiphi in [2.94,3.02] GeV). Angular distributions are consistent with J^P = 0- in the eta_c resonance region and favor J^P = 0+ below the eta_c resonance.