Measurements of branching fractions for electromagnetic transitions involving the $\chi_{bJ}(1P)$ states
(2010)
Search for rare and forbidden decays of charm and charmed-strange mesons to final states h±e e+
Physical Review D - Particles, Fields, Gravitation and Cosmology 82:9 (2010)
Abstract:
We have searched for flavor-changing neutral current decays and lepton-number-violating decays of D+ and Ds+ mesons to final states of the form h±e e+, where h is either π or K. We use the complete samples of CLEO-c open-charm data, corresponding to integrated luminosities of 818pb-1 at the center-of-mass energy E CM=3.774GeV containing 2.4×106 D+D- pairs and 602pb-1 at ECM=4.170GeV containing 0.6×106 Ds*±Ds pairs. No signal is observed in any channel, and we obtain 90% confidence level upper limits on branching fractions B(D +→π+e+e-)<5. 9×10-6, B(D+→π-e +e+)<1.1×10-6, B(D+→ K+e+e-)<3.0×10-6, B(D +→K-e+e+)<3.5×10 -6, B(Ds+→π+e+e-)<2. 2×10-5, B(Ds+→π-e+e +)<1.8×10-5, B(Ds+→K+e +e-)<5.2×10-5, and B(Ds+→K -e+e+)<1.7×10-5. © 2010 The American Physical Society.Measurement of σ(pp→bb̄X) at √s=7 TeV in the forward region
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 694:3 (2010) 209-216
Abstract:
Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the bb̄ production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In the pseudorapidity interval 2<η<6 and integrated over all transverse momenta we find that the average cross-section to produce b-flavoured or b̄-flavoured hadrons is (75.3±5.4±13.0) μb. © 2010 CERN.Study of ψ(2S) decays to γpp̄, π0pp̄, and ηpp̄, and search for pp̄ threshold enhancements
Physical Review D - Particles, Fields, Gravitation and Cosmology 82:9 (2010)