Recerca: Enviaments recents
Ara mostrant els elements 1221-1240 de 2793
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Determination of the branching fractions of B 0S → D ∓S K ∓ and B 0 → D −S K +
(Journal of High Energy Physics, 2015, Vol. 2015, No.19 (Abril), 2015-04-07) -
Observation of the Decay B+c → B0s π+
(Physical Review Letters , 2013, Vol. 111, No.18 (Novembre), 2013-11-01)The result of a search for the decay B+c→B0sπ+ is presented, using the B0s→D−sπ+ and B0s→J/ψϕ channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding ... -
Measurement of polarization amplitudes and CP asymmetries in B 0 → ϕK *(892)0
(Journal of High Energy Physics, 2014, Vol. 2014, No.5 (Maig), 2014-05-16)An angular analysis of the decay B 0 → ϕK *(892)0 is reported based on a pp collision data sample, corresponding to an integrated luminosity of 1.0 fb−1, collected at a centre-of-mass energy of s√ = 7 ... -
Measurement of the CKM angle γ using B ± → DK ± with D → K 0 S π + π −, K 0 S K + K − decays
(Journal of High Energy Physics, 2014, Vol. 2014, No.10 (Octubre), 2014-10-16)A binned Dalitz plot analysis of B ± → DK ± decays, with D→K0Sπ+π− and D→K0SK+K−, is performed to measure the CP-violating observables x ± and y ±, which are sensitive to the Cabibbo-Kobayashi-Maskawa ... -
A model-independent Dalitz plot analysis of B±→DK± with D→K0Sh+h− (h=π,K) decays and constraints on the CKM angle γ
(Physics Letters B , 2015, Vol. 718, No. 1 (Novembre), 2012-11-15)A binned Dalitz plot analysis of B± → DK± decays, with D → K0 Sπ+π− and D → K0 S K+K−, is performed to measure the CP-violating observables x± and y± which are sensitive to the CKM angle γ . The analysis ... -
Study of the rare B0s and B0 decays into the π+ π− μ+ μ− final state
(Physics Letters B , 2015, Vol. 743 (Abril), 2015-04-09)A search for the rare decays B0s→π+π−μ+μ−and B0→π+π−μ+μ−is performed in a data set corresponding to an integrated luminosity of 3.0fb−1collected by the LHCb detector in proton–proton collisions at ... -
Observation of the decay B0s → ψ(2S) K+ π−
(Physics Letters B , 2015, Vol. 747, (Juliol), 2015-07-30)The decay B-0s → ψ(2S)K+π- is observed using a data set corresponding to an integrated luminosity of 3.0fb-1 collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. ... -
Determination of γ and −2βs from charmless two-body decays of beauty mesons
(Physics Letters B , 2015, Vol. 741 (Febrer), 2015-02-04)Using the latest LHCb measurements of time-dependent CP violation in the B-s(0) -> K+K- decay, a U-spin relation between the decay amplitudes of B-s(0) -> K+K- and B-0 -> p(+)p(-) decay processes allows ... -
Measurement of the B 0 s → ϕϕ branching fraction and search for the decay B 0 → ϕϕ
(Journal of High Energy Physics, 2015, Vol. 2015, No.8 (Octubre), 2015-10-08)Using a dataset corresponding to an integrated luminosity of 3.0 fb−1 collected in pp collisions at centre-of-mass energies of 7 and 8 TeV, the B 0 s → ϕϕ branching fraction is measured to be B(B0s→ϕ ... -
Measurement of the CP-violating phase β in B0 → J/ψ π+ π− decays and límits on penguin effects
(Physics Letters B , 2015, Vol. 742, (Març), 2015-03-06)Time-dependent CPviolation is measured in the (—)B0→J/ψπ+π−channel for each π+π−resonant final state using data collected with an integrated luminosity of 3.0fb−1in ppcollisions using the LHCb detector. ... -
Low noise front end ICECAL ASIC for the upgrade of the LHCb calorimeter
(Journal of Instrumentation, 2012, Vol. 7, No.1 (Gener), 2012-01-23)A fully differential ASIC with cooled input termination is presented as a solution for the Upgrade of the Calorimeter front end electronics. The LHCb experiment needs to increase about ten times the ... -
Measurement of the time-integrated CP asymmetry in D 0 → K 0S K 0S decays
(Journal of High Energy Physics, 2015, Vol. 2015, No.10 (Octubre), 2015-10-08)The time-integrated CP asymmetry in the decay D 0 → K 0S K 0S is measured using 3 fb−1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The ... -
Measurement of the exclusive Υ production cross-section in pp collisions at s√=7 TeV and 8 TeV
(Journal of High Energy Physics, 2015, Vol. 2015, No.9 (Setembre), 2015-09-14)A study is presented of central exclusive production of Υ(nS) states, where the Υ(nS) resonances decay to the μ + μ − final state, using pp collision data recorded by the LHCb experiment. The cross-section ... -
Measurement of CP violation parameters and polarisation fractions in B0s→J/ψK¯¯¯¯∗0 decays
(Journal of High Energy Physics, 2015, Vol. 2015, No.11 (Novembre), 2015-11-12)The first measurement of CP asymmetries in the decay B0s→J/ψK¯¯¯¯∗(892)0 and an updated measurement of its branching fraction and polarisation fractions are presented. The results are obtained using ... -
Measurements of the B +, B 0, B0s meson and Λ0b baryon lifetimes
(Journal of High Energy Physics, 2014, Vol. 2014, No.a (Abril), 2014-04-16)Measurements of b-hadron lifetimes are reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using ... -
Observation of Z production in proton-lead collisions at LHCb
(Journal of High Energy Physics, 2014, Vol. 2014, No.8 (Agost), 2014-08-19)The first observation of Z boson production in proton-lead collisions at a centre-of-mass energy per proton-nucleon pair of sNN−−−−√ = 5 TeV is presented. The data sample corresponds to an integrated ... -
Searches for Λ0b and Ξ0b decays to K0Spπ− and K0SpK− final states with first observation of the Λ0b→K0Spπ− decay
(Journal of High Energy Physics, 2014, Vol. 2014, No.4 (Abril), 2014-04-11)A search for previously unobserved decays of beauty baryons to the final states K0Spπ− and K0SpK− is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 ... -
Measurement of theB± production cross-section in pp collisions at √s= 7TeV
(Journal of High Energy Physics, 2012, Vol. 2012, No.4 (Abril), 2012-04-19)The production of B ± mesons in proton-proton collisions at s√ = 7 TeV is studied using 35 pb−1 of data collected by the LHCb detector. The B ± mesons are reconstructed exclusively in the B ± → J/ψK ± ... -
Study of forward Z + jet production in pp collisions at s√ = 7 TeV
(Journal of High Energy Physics, 2014, Vol. 2014, No.1 (Gener), 2014-01-09)A measurement of the Z(→ μ + μ −) + jet production cross-section in pp collisions at a centre-of-mass energy s√ = 7 TeV is presented. The analysis is based on an integrated luminosity of 1.0 fb−1 recorded ... -
First observation and measurement of the branching fraction for the decay B 0 s → D ∗ s ∓ K ±
(Journal of High Energy Physics, 2015, Vol. 2015, No.6 (Juny), 2015-06-18)The first observation of the B 0 s → D ∗ s ∓ K ± decay is reported using 3.0 fb−1 of proton-proton collision data collected by the LHCb experiment. The D ∗ s ∓ mesons are reconstructed through the decay ...