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Title: | Angular analysis of the B 0 → K *0 e + e - decay in the low- q 2 region |
Author: | Badalov, A. Casanova Mohr, Raimon Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, V. Ruiz, Hugo LHCb Collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | 14-Apr-2015 |
Publisher: | Springer Verlag |
Abstract: | An angular analysis of the B0 → K∗0 e +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 GeV2/c4 . The angular observables FL and ARe T which are related to the K∗0 polarisation and to the lepton forward-backward asymmetry, are measured to be FL = 0.16±0.06±0.03 and ARe T = 0.10±0.18±0.05, where the first uncertainty is statistical and the second systematic. The angular observables A (2) T and AIm T which are sensitive to the photon polarisation in this q 2 range, are found to be A (2) T = −0.23 ± 0.23 ± 0.05 and AIm T = 0.14 ± 0.22 ± 0.05. The results are consistent with Standard Model predictions. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP04(2015)064 |
It is part of: | Journal of High Energy Physics, 2015, vol. 2015, num. 64, p. 1-26 |
URI: | http://hdl.handle.net/2445/185717 |
Related resource: | https://doi.org/10.1007/JHEP04(2015)064 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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