LHCb strategies for γ from

Abstract

One of the most promising ways to determine the angle γ of the CKM unitarity triangle is through measurement of the tree level processes B → DK. The LHCb collaboration has studied the potential of these decays employing the Atwood-Dunietz-Soni (ADS) and Dalitz methods, making use of a large sample of simulated data. For each method the expected sensitivities to the angle γ are presented in this report.

The use of quantum-correlated D0 decays for φ3 measurement

“…Further improvement of φ 3 precision at the super B factory [15] and LHCb [16] will require a larger charm dataset, which can be provided by the BES-III experiment [17,18].…”

Upgrade of LHCb

“…The former is a very sensitive probe of new physics and the little but persistent discrepancy observed between those measurements is a motivation to reduce the errors on sin(2β e f f ). Extrapolating from [5], the precision on the phase could reach in the single B 0 → φ K 0 channel 0.05 after 50fb −1 . This decay may be supplemented by another interesting measurement also dominated by penguin diagrams thus also sensitive to new physics and whose nice property is to be a "null" measurement : the B 0 → φ φ channel.…”

LHCb Upgrad - Physics Case and High Luminosity Detector Optimisation

“…Improved measurements are needed to shed light in this area. At the upgrade we hope to collect up to 70000 events, leading to a precision of 0.025, extrapolating from [12]. This channel can be complemented by the B 0 s → φ φ decay, in which the penguin and box contributions to the mixing phase are expected to cancel, and where NP contributions could affect this cancellation and result in a measureable CP asymmetry.…”