Measurement of the B  0 → K  ∗0  e  +  e  − branching fraction at low dilepton mass

descriptionPublicationkeyboard_double_arrow_right Article 01 May 2013 Netherlands, Spain, Spain, Italy, Italy, Italy, Italy, Italy, Italy, Italy, Italy, Italy, United States, Italy, Spain, Italy, Italy, Italy, Spain, Spain English Publisher:Springer Science and Business Media LLCJournal:Journal of High Energy Physics, volume 2,013 (eissn: 1029-8479,

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Authors: Aaij, R.; Abellan Beteta, C.; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; +193 Authors

Aaij, R.; Abellan Beteta, C.; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alves, A. A.; Amato, S.; Amerio, S.; Amhis, Y.; Anderlini, L.; Anderson, J.; Andreassen, R.; Appleby, R. B.; Aquines Gutierrez, O.; Archilli, F.; Artamonov, A.; Artuso, M.; Aslanides, E.; Auriemma, G.; Bachmann, S.; Back, J. J.; Baesso, C.; Balagura, V.; Baldini, W.; Barlow, R. J.; Barschel, C.; Barsuk, S.; Barter, W.; Bauer, Th.; Bay, A.; Beddow, J.; Bedeschi, F.; Bediaga, I.; Belogurov, S.; Belous, K.; Belyaev, I.; Ben-Haim, E.; Benayoun, M.; Bencivenni, G.; Benson, S.; Benton, J.; Berezhnoy, A.; Bernet, R.; Bettler, M.-O.; Beuzekom, M.; Bien, A.; Bifani, S.; Bird, T.; Bizzeti, A.; Bjørnstad, P. M.; Blake, T.; Blanc, F.; Blouw, J.; Blusk, S.; Bocci, V.; Bondar, A.; Bondar, N.; Bonivento, W.; Borghi, S.; Borgia, A.; Bowcock, T. J. V.; Bowen, E.; Bozzi, C.; Brambach, T.; Brand, J.; Bressieux, J.; Brett, D.; Britsch, M.; Britton, T.; Brook, N. H.; Brown, H.; Burducea, I.; Bursche, A.; Busetto, G.; Buytaert, J.; Cadeddu, S.; Callot, O.; Calvi, M.; Calvo Gomez, M.; Camboni, A.; Campana, P.; Campora Perez, D.; Carbone, A.; Carboni, G.; Cardinale, R.; Cardini, A.; Carranza-Mejia, H.; Carson, L.; Carvalho Akiba, K.; Casse, G.; Cattaneo, M.; Cauet, Ch.; Charles, M.; Charpentier, Ph.; Chen, P.; Chiapolini, N.; Chrzaszcz, M.; Ciba, K.; Cid Vidal, X.; Ciezarek, G.; Clarke, P. E. L.; Clemencic, M.; Cliff, H. V.; Closier, J.; Coca, C.; Coco, V.; Cogan, J.; Cogneras, E.; Collins, P.; Comerma-Montells, A.; Contu, A.; Cook, A.; Coombes, M.; Coquereau, S.; Corti, G.; Couturier, B.; Cowan, G. A.; Craik, D. C.; Cunliffe, S.; Currie, R.; D’Ambrosio, C.; David, P.; David, P. N. Y.; Bonis, I.; Bruyn, K.; Capua, S.; Cian, M.; Miranda, J. M.; Paula, L.; Silva, W.; Simone, P.; Decamp, D.; Deckenhoff, M.; Buono, L.; Derkach, D.; Deschamps, O.; Dettori, F.; Canto, A.; Dijkstra, H.; Dogaru, M.; Donleavy, S.; Dordei, F.; Dosil Suárez, A.; Dossett, D.; Dovbnya, A.; Dupertuis, F.; Dzhelyadin, R.; Dziurda, A.; Dzyuba, A.; Easo, S.; Egede, U.; Egorychev, V.; Eidelman, S.; Eijk, D.; Eisenhardt, S.; Eitschberger, U.; Ekelhof, R.; Eklund, L.; Rifai, I.; Elsasser, Ch.; Elsby, D.; Falabella, A.; Färber, C.; Fardell, G.; Farinelli, C.; Farry, S.; Fave, V.; Ferguson, D.; Fernandez Albor, V.; Ferreira Rodrigues, F.; Ferro-Luzzi, M.; Filippov, S.; Fiore, M.; Fitzpatrick, C.; Fontana, M.; Fontanelli, F.; Forty, R.; Francisco, O.; Frank, M.; Frei, C.; Frosini, M.; Furcas, S.; Furfaro, E.; Gallas Torreira, A.; Galli, D.; Gandelman, M.; Gandini, P.; Gao, Y.; Garofoli, J.; Garosi, P.; Garra Tico, J.; Garrido, L.;

Measurement of the B 0 → K ∗0 e + e − branching fraction at low dilepton mass

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Abstract

Abstract The branching fraction of the rare decay B 0 → K ∗0 e + e − in the dilepton mass region from 30 to 1000 MeV/c 2 has been measured by the LHCb experiment, using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, at a centre-of-mass energy of 7 TeV. The decay mode B 0 → J/ψ (e + e −)K ∗0 is utilized as a normalization channel. The branching fraction $ \mathcal{B}\left( {{B^0}\to {K^{*0 }}{e^{+}}{e^{-}}} \right) $ is measured to be $ \mathcal{B}{{\left( {{B^0}\to {K^{*0 }}{e^{+}}{e^{-}}} \right)}^{{30-1000\,{{\mathrm{MeV}} \left/ {{{c^2}}} \right.}}}}=\left( {3.1_{-0.8}^{+0.9 }{\,}_{-0.3}^{+0.2}\pm 0.2} \right)\times {10^{-7 }}, $ where the first error is statistical, the second is systematic, and the third comes from the uncertainties on the B 0 → J/ψ K ∗0 and J/ψ → e + e − branching fractions.

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Netherlands, Spain, Spain, Italy, Italy, Italy, Italy, Italy, Italy, Italy, Italy, Italy, United States, Italy, Spain, Italy, Italy, Italy, Spain, Spain

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Keywords

Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE, Nuclear and High Energy Physics, Flavour Changing Neutral Currents, Hadrons, B physics, Partícules (Física nuclear), 539, TOOL, Gran col·lisionador d'hadrons (França i Suïssa), DECAYS; TOOL, Large Hadron Collider (France and Switzerland), QC, Hadron-Hadron Scattering, B physics; Branching fraction; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Rare decay, Gran Col·lisionador d'Hadrons, Cromodinàmica quàntica, Rare decay, B physics; Branching fraction; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Rare decay; Nuclear and High Energy Physics, Bottom mesons (|B|>0); Leptonic semileptonic and radiative decays of bottom mesons; Neutral currents; Models beyond the standard model, 539 - Constitució física de la matèria, Física nuclear, Branching fraction, B physics; Branching fraction; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Rare decay;, DECAY, Quantum chromodynamics

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