Journal Article

Observation of associated production of aZboson with aDmeson in the forward region

Blouw, J., Blusk, S., Bettler, M.-O., Blake, T., Britton, T., Barsuk, S., Casse, G., Alexander, M., Aaij, R., Anderlini, L., Cardinale, R., Calvo Gomez, M., Balagura, V., Barlow, R. J., Alkhazov, G., Carvalho Akiba, K., Brook, N. H., Bien, A., Cardini, A., Bedeschi, F., Belous, K., Alves Jr, A. A., Benton, J., Bonivento, W., Calabrese, R., Adeva, B., Affolder, A., Andreassen, R., Bencivenni, G., Bondar, N., Anderson, J., Bifani, S., Badalov, A., Bauer, Th, Bozzi, C., Carson, L., Barter, W., Blanc, F., van den Brand, J., Adinolfi, M., Aslanides, E., Bowcock, T. J. V., Campora Perez, D., Andreotti, M., Borgia, A., Albrecht, J., Ajaltouni, Ziad Zj, Bjørnstad, P. M., Amhis, Y., Back, J. J., Carboni, G., Belyaev, I., Carbone, A., Brown, H., Aquines Gutierrez, O., Baldini, W., Brambach, T., Barschel, C., Bressieux, J., Amerio, S., Berezhnoy, A., Camboni, A., Bocci, V., Busetto, G., Bowen, E., Bachmann, S., Cadeddu, S., Artuso, M., Bernet, R., Borsato, M., Ali, S., Callot, O., Auriemma, G., Artamonov, A., Archilli, F., Brett, D., Appleby, R. B., Beddow, J., Bediaga, I., Bird, T., Calvi, M., Batozskaya, V., Borghi, S., Baalouch, M., van Beuzekom, M., Belogurov

2014

Overview

A search for associated production of aZboson with an open charm meson is presented using a data sample, corresponding to an integrated luminosity of1.0 \\mathrm{fb}{^(-')}{}of proton–proton collisions at a centre-of-mass energy of 7 TeV, collected by the LHCb experiment. %% Seven candidate events for associated production of aZboson with aD⁰meson and four candidate events for aZboson with aD⁺meson are observed with a combined significance of 5.1standard deviations. The production cross-sections in the forward region are measured to beσ_(Z→μ⁺μ⁻\\!{,}{D}{⁰}) = 2.50±1.12±0.22pbσ_(Z→μ⁺μ⁻\\!{,}{D}{⁺}) = 0.44±0.23±0.03pb,where the first uncertainty is statistical and the second systematic.

• Publisher: Springer
• Subject: High Energy Physics - Experiment / Physics