arXiv subjects

Stefania Ricciardi

Publications and source records attributed to Stefania Ricciardi.

6 recordsLinked to original sources

arXiv2013

Measurements of the CKM angle gamma in tree-dominated decays at LHCb

We review the first measurements of the CKM angle gamma from LHCb. These measurements have been performed with b-hadron decays dominated by b -> u and b -> c tree-level amplitudes, from which gamma can be determined without theoretical uncertainties. Precision is achieved by averaging results from B- -> Dh- (h= K,pi) decays with D -> h+h-, D -> K+pi-, and D -> K+pi-pi+pi-, and D -> K_S^0h+h-. Prospects for these and future measurements of gamma using neutral b-hadron decays are briefly discussed.

hep-ex↗

arXiv2011

Studies of b-hadron decays to charming final states at LHCb

We present studies from the LHCb experiment of decays of the type H_b to H_c X, where H_b represents a beauty hadron (B+, B0 or Lambda_b) and H_c a charmed hadron (D0, D(*)+, Ds or Lambda_c). Such decays are important for the determination of the CKM angle gamma, a key goal of the LHCb physics programme. We exploit the data accumulated in 2010, and in the early months of the 2011 run. We report on the observation of new decay modes, and first measurements on the road to a precise determination of gamma.

hep-ex↗

arXiv2011

Extraction of the weak angle gamma from B to charm decays

We give a summary of the discussions in Working Group V of the CKM2010 workshop dealing with determinations of the angle gamma of the unitarity triangle of the Cabibbo-Kobayashi-Maskawa matrix from B-meson decays into charmed final states.

hep-ph↗

arXiv2011

CLEO-c inputs to the determination of the CKM angle gamma

The strong-phase differences between D0 and D0bar decays to common final states are crucial parameters in the determination of the CKM angle gamma from B to DK modes. The first quantum-correlated measurements of these parameters in several D decay modes have been performed with the CLEO-c data at the psi(3770) resonance. Studies for D to K0 K+ K-, D to K0 pi+ pi-, D to K+ pi-, D to K+ pi- pi0, and D to K+ pi- pi+ pi- are reviewed.

hep-ex↗

arXiv2009

Quantum-correlated D decays at CLEO-c

The 818 fb^-1 dataset collected at the ψ(3770) resonance in the CLEO-c detector offers unique possibilities for measuring strong-phase differences in neutral D decays. We report results for D decays to K_S pi+ pi- and K_S K+ K-. The measurements require that both D mesons in the event are fully reconstructed, with one decaying to the signal mode of interest, and the other to a CP-eigenstate, or a flavour-specific state, or K_{S,L} h+ h- (h = pi or K). The strong-phase differences extracted from these decays are important inputs to the determination of the CKM angle gamma with B->D(K_S h+ h-)K decays.

hep-ex↗

arXiv2005

Pentaquarks and new hadron spectroscopy at BaBar

Recent results on the search for pentaquarks and on charmonium spectroscopy at BaBar are reviewed. The latter includes the observation of the puzzling new state X(3872) -> J/psi pi+ pi- in B decays, and the searches for X(3872) in two-body B decays and initial state radiation events.

hep-ex↗