Angular analysis of the B0 → K*0e+e decay in the low-q2 region

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. CAlvarez artelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, R. AndreassenM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, A. Bertolin, M. O. Bettler, M. van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, M. Borsato, T. J.V. Bowcock, E. Bowen, C. Bozzi, D. Brett, M. Britsch, T. Britton, J. Brodzicka, N. H. Brook, A. Bursche, J. Buytaert, S. Cadeddu, R. Calabrese, M. Calvi, M. Calvo Gomez, P. Campana, D. Campora Perez, L. Capriotti, A. Carbone

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Abstract

Abstract: An angular analysis of the B 0 → K *0e +e decay is performed using a data sample, corresponding to an integrated luminosity of 3.0 fb −1, collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV during 2011 and 2012. For the first time several observables are measured in the dielectron mass squared (q 2) interval between 0.002 and 1.120 GeV 2/c 4. The angular observables F L and A T Re which are related to the K *0 polarisation and to the lepton forward-backward asymmetry, are measured to be F L = 0.16 ± 0.06 ± 0.03 and A T Re = 0.10 ± 0.18 ± 0.05, where the first uncertainty is statistical and the second systematic. The angular observables A T (2) and A T Im which are sensitive to the photon polarisation in this q 2 range, are found to be A T (2) = − 0.23 ± 0.23 ± 0.05 and A T Im = 0.14 ± 0.22 ± 0.05. The results are consistent with Standard Model predictions.[Figure not available: see fulltext.]

Original languageEnglish
Article number64
JournalJournal of High Energy Physics
Volume2015
Issue number4
DOIs
Publication statusPublished - 1 Apr 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015, The Author(s).

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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