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Journal articles
First observation of the decay D0→K−π+μ+μ− in the ρ0-ω region of the dimuon mass spectrum
R. Aaij
L. Beaucourt
1
M. Chefdeville
1
D. Decamp
1
N. Déléage
1
P. Ghez
1
J.P. Lees
1
J.F. Marchand
1
M.N. Minard
1
B. Pietrzyk
1
W. Qian
1
S. t'Jampens
1
V. Tisserand
1
E. Tournefier
1
Z.J. Ajaltouni
2
M. Baalouch
2
E. Cogneras
2
O. Deschamps
2
I. El Rifai
2
G. Gazzoni
2
M. Grabalosa Gándara
2
Pierre Henrard
2
M. Hoballah
2
M. Kozeiha
2
R. Lefèvre
2
J. Maratas
2
S. Monteil
2
V. Niess
2
P. Perret
2
Y. Amhis
3
S. Barsuk
3
M. Borsato
3
O. Kochebina
3
J. Lefrançois
3
Y. Li
3
F. Machefert
3
G. Manca
3
R. Quagliani
3
P. Robbe
3
M-H. Schune
3
M. Teklishyn
3
A. Vallier
3
B. Viaud
3
G. Wormser
3
S. Akar
4
E. Aslanides
4
J. Cogan
4
K. De Bruyn
4
W. Kanso
4
R. Legac
4
O. Leroy
4
G. Mancinelli
4
M. Martin
4
A. Mordà
4
J. Serrano
4
A. Tayduganov
4
A. Tsaregorodtsev
4
R. Aaij
Author
L. Beaucourt 1
Author
M. Chefdeville 1
Author IdHAL : maximilien-chefdeville arXiv : https://arxiv.org/a/Maximilien Chefdeville MC ORCID : https://orcid.org/0000-0002-6553-6493
D. Decamp 1
Author
M.N. Minard 1
Author
B. Pietrzyk 1
Author
W. Qian 1
Author
S. t'Jampens 1
Author IdHAL : stephane-tjampens ORCID : https://orcid.org/0000-0003-4249-6641
E. Cogneras 2
Author IdHAL : eric-cogneras ORCID : https://orcid.org/0000-0002-8933-9427
O. Deschamps 2
Author IdHAL : olivier-deschamps arXiv : http://arxiv.org/a/deschamps_o_1 ORCID : https://orcid.org/0000-0002-7047-6042
I. El Rifai 2
Author
G. Gazzoni 2
Author
P. Perret 2
Author IdHAL : pascal-perret ORCID : https://orcid.org/0000-0002-5732-4343
Y. Amhis 3
Author
S. Barsuk 3
Author
M. Borsato 3
Author
S. Akar 4
Author
E. Aslanides 4
Author
J. Cogan 4
Author IdHAL : julien-cogan ORCID : https://orcid.org/0000-0001-7194-7566
K. De Bruyn 4
Author
W. Kanso 4
Author
R. Legac 4
Author
O. Leroy 4
Author IdHAL : olivier-leroy ORCID : https://orcid.org/0000-0002-2589-240X
G. Mancinelli 4
Author
M. Martin 4
Author
A. Mordà 4
Author
J. Serrano 4
Author IdHAL : justine-serrano arXiv : https://arxiv.org/a/Justine Serrano ORCID : https://orcid.org/0000-0003-2489-7812
A. Tayduganov 4
Author
A. Tsaregorodtsev 4
Author
1
LAPP - Laboratoire d'Annecy de Physique des Particules (9 Chemin de Bellevue - BP 110 - 74941 Annecy-le-Vieux CEDEX - France - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc (27, rue Marcoz - 73000 Chambéry - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5814 (France)
2
LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand (Campus des Cézeaux, 24 avenue des Landais, BP 80026, 63171 Aubière Cedex - France)
- UBP - Université Blaise Pascal - Clermont-Ferrand 2 (34, avenue Carnot - BP 185 / 63006 Clermont-Ferrand cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR6533 (France)
3
LAL - Laboratoire de l'Accélérateur Linéaire (Centre Scientifique d'Orsay B.P. 34 91898 ORSAY Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8607 (France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
4
CPPM - Centre de Physique des Particules de Marseille (163, avenue de Luminy - Case 902 - 13288 Marseille cedex 09 - France)
- AMU - Aix Marseille Université : UMR7346 / UMR6550 / UMR6450 / URA6450 (Aix-Marseille Université Jardins du Pharo 58 Boulevard Charles Livon 13284 Marseille cedex 7 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR7346 / UMR6550 / UMR6450 / URA6450 (France)
Abstract : A study of the decay D0→K−π+μ+μ− is performed using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2.0 fb−1. Decay candidates with muon pairs that have an invariant mass in the range 675--875 MeV/c2 are considered. This region is dominated by the ρ0 and ω resonances. The branching fraction in this range is measured to be B(D0→K−π+μ+μ− ) = (4.17±0.12(stat)±0.40(syst))×10−6. This is the first observation of the decay D0→K−π+μ+μ−. Its branching fraction is consistent with the value expected in the Standard Model.
Document type :
Journal articles
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http://hal.in2p3.fr/in2p3-01222150
Contributor : Claudine Bombar Connect in order to contact the contributor
Submitted on : Thursday, October 29, 2015 - 12:05:56 PM
Last modification on : Thursday, December 16, 2021 - 2:11:23 PM
Contributor : Claudine Bombar Connect in order to contact the contributor
Submitted on : Thursday, October 29, 2015 - 12:05:56 PM
Last modification on : Thursday, December 16, 2021 - 2:11:23 PM
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Identifiers
- HAL Id : in2p3-01222150, version 1
- DOI : 10.1016/j.physletb.2016.04.029
- ARXIV : 1510.08367
Collections
IN2P3 | LAPP | CNRS | UNIV-SAVOIE | LAL | LPC-CLERMONT | PRES_CLERMONT | CPPM | UNIV-AMU | UGA
Citation
R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. First observation of the decay D0→K−π+μ+μ− in the ρ0-ω region of the dimuon mass spectrum. Physics Letters B, Elsevier, 2016, 757, pp.558-567. ⟨10.1016/j.physletb.2016.04.029⟩. ⟨in2p3-01222150⟩
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