Searches for rare $$ {B}_s^0 $$ and B0 decays into four muons

Study of the rare Bs0 and B0 decays into the π+π−μ+μ− final state

Article history: Received 19 December 2014 Received in revised form 3 February 2015 Accepted 5 February 2015 Available online 11 February 2015 Editor: W.-D. Schlatter A search for the rare decays Bs → π+π−μ+μ− and B0 → π+π−μ+μ− is performed in a data set corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb detector in proton– proton collisions at centre-of-mass energies o...

Searches for rare or forbidden semileptonic charm decays

J. P. Lees, V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, D. A. Milanes, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, D.N. Brown, L. T. Kerth, Yu. G. Kolomensky, G. Lynch, H. Koch, T. Schroeder, D. J. Asgeirsson, C. Hearty, T. S. Mattison, J. A. McKenna, A. Khan, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, E. A. Kravchenko, A. P. Onuchin, S. I. S...

Searches for B0 decays to combinations of two charmless isoscalar mesons.

We search for B meson decays into two-body combinations of eta, eta', omega, and phi mesons from 89 x 10(6) BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We find the branching fraction B(B0-->etaomega)=(4.0(+1.3)(-1.2)+/-0.4)x10(-6) with a significance of 4.3 sigma. For the other decay modes we set the following 90% confidence level upper limi...

Extracting the charm cross-section from semileptonic decays into muons

We propose a sensitive measurement of the charm total cross-section at RHIC through muon identification from charm semileptonic decay at low transverse momentum (pT ). This can test the binary-collision scaling (Nbin) properties of the charm total cross-section and be used to study whether heavy-flavor quarks, which are used as a probe, are produced exclusively at the initial impact in hadron-h...

Search for the rare decays B0s→μ+μ− and B0→μ+μ−