Measurement of the polarization amplitudes and triple product asymmetries in the B_s^0 -> phi phi decay

TL;DR

This paper reports precise measurements of polarization amplitudes, phase differences, and asymmetries in the B_s^0 -> phi phi decay using LHCb data, providing insights into CP violation and decay dynamics.

Contribution

First measurement of polarization amplitudes and triple product asymmetries in B_s^0 -> phi phi decay with detailed statistical and systematic uncertainties.

Findings

Measured polarization amplitudes |A_0|^2 and |A_perp|^2 with uncertainties.

Determined strong phase difference cos(delta_parallel).

Measured triple product asymmetries A_U and A_V close to zero.

Abstract

Using 1.0 fb^{-1} of pp collision data collected at a centre-of-mass energy of sqrt{s}=7 TeV with the LHCb detector, measurements of the polarization amplitudes, strong phase difference and triple product asymmetries in the B_s^0 -> phi phi decay mode are presented. The measured values are |A_0|^2 = 0.365 +- 0.022 (stat) +- 0.012 (syst), |A_perp|^2 = 0.291 +- 0.024 (stat) +- 0.010 (syst), cos(delta_parallel) = -0.844 +- 0.068 (stat) +- 0.029 (syst), A_U = -0.055 +- 0.036 (stat) +- 0.018 (syst), A_V = 0.010 +- 0.036 (stat) +- 0.018 (syst) .