Measuring the Fourth Generation b --> s Quadrangle at the LHC

TL;DR

This paper proposes a method to precisely measure the parameters of the four-generation standard model by combining CP violation measurements, decay rates, and direct searches at the LHC, enabling the determination of the b --> s quadrangle.

Contribution

It introduces a comprehensive approach to determine the four-generation CKM matrix elements through combined measurements at the LHC.

Findings

Potential to determine V_{t's}^*V_{t'b} precisely.

Discrimination of four-generation effects using B decay asymmetries.

Enhanced understanding of CP violation in B meson decays.

Abstract

We show that simultaneous precision measurement of the CP-violating phase in time-dependent Bs --> J/psi phi study and the Bs --> mu+ mu- rate, together with measuring m_t' by direct search at the LHC, would determine V_{t's}^*V_{t'b} and therefore the b --> s quadrangle in the four-generation standard model. The forward-backward asymmetry in B --> K* l+ l- provides further discrimination.