Measurement of the X(3872) production cross section via decays to J/psi pi pi in pp collisions at sqrt(s) = 7 TeV
S. Chatrchyan
,
M. Besançon
(1)
,
S. Choudhury
(1)
,
M. Dejardin
(1)
,
D. Denegri
(1)
,
B. Fabbro
(1)
,
J.L. Faure
(1)
,
F. Ferri
(1)
,
S. Ganjour
(1)
,
A. Givernaud
(1)
,
P. Gras
(1)
,
G. Hamel de Monchenault
(1)
,
P. Jarry
(1)
,
E. Locci
(1)
,
J. Malcles
(1)
,
L. Millischer
(1)
,
A. Nayak
(1)
,
J. Rander
(1)
,
A. Rosowsky
(1)
,
M. Titov
(1)
,
S. Baffioni
(2)
,
F. Beaudette
(2)
,
L. Benhabib
(2)
,
L. Bianchini
(2)
,
M. Bluj
(2)
,
Pierre Busson
(2)
,
C. Charlot
(2)
,
N. Daci
(2)
,
T. Dahms
(2)
,
M. Dalchenko
(2)
,
L. Dobrzynski
(2)
,
A. Florent
(2)
,
R. Granier de Cassagnac
(2)
,
M. Haguenauer
(2)
,
P. Mine
(2)
,
C. Mironov
(2)
,
I.N. Naranjo
(2)
,
M. Nguyen
(2)
,
C. Ochando
(2)
,
P. Paganini
(2)
,
D. Sabes
(2)
,
R. Salerno
(2)
,
Y. Sirois
(2)
,
C. Veelken
(2)
,
A. Zabi
(2)
,
J.-L. Agram
(3)
,
J. Andrea
(3)
,
D. Bloch
(3)
,
D. Bodin
(3)
,
J.-M. Brom
(3)
,
M. Cardaci
(3)
,
E.C. Chabert
(3)
,
C. Collard
(3)
,
E. Conte
(3)
,
F. Drouhin
(3)
,
J.-C. Fontaine
(3)
,
D. Gele
(3)
,
U. Goerlach
(3)
,
P. Juillot
(3)
,
A.-C. Le Bihan
(3)
,
P. van Hove
(3)
,
S. Beauceron
(4)
,
N. Beaupere
(4)
,
O. Bondu
(4)
,
G. Boudoul
(4)
,
S. Brochet
(4)
,
J. Chasserat
(4)
,
R. Chierici
(4)
,
D. Contardo
(4)
,
P. Depasse
(4)
,
H. El Mamouni
(4)
,
J. Fay
(4)
,
S. Gascon
(4)
,
M. Gouzevitch
(4)
,
B. Ille
(4)
,
T. Kurca
(4)
,
M. Lethuillier
(4)
,
L. Mirabito
(4)
,
S. Perries
(4)
,
L. Sgandurra
(4)
,
V. Sordini
(4)
,
Y. Tschudi
(4)
,
P. Verdier
(4)
,
S. Viret
(4)
S. Chatrchyan
- Function : Author
Pierre Busson
- Function : Author
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R. Granier de Cassagnac
- Function : Author
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C. Mironov
- Function : Author
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P. Paganini
- Function : Author
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J.-L. Agram
- Function : Author
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C. Collard
- Function : Author
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E. Conte
- Function : Author
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P. van Hove
- Function : Author
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M. Gouzevitch
- Function : Author
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- IdHAL : maxime-gouzevitch
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M. Lethuillier
- Function : Author
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- IdHAL : morgan-lethuillier
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V. Sordini
- Function : Author
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- IdHAL : viola-sordini
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P. Verdier
- Function : Author
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- IdHAL : patrice-verdier
- ORCID : 0000-0003-3090-2948
- IdRef : 098525859
Abstract
The production of the X(3872) is studied in pp collisions at sqrt(s) = 7 TeV, using decays to J/psi pi pi, where the J/psi decays to two muons. The data were recorded by the CMS experiment and correspond to an integrated luminosity of 4.8 inverse femtobarns. The measurements are performed in a kinematic range in which the X(3872) candidates have a transverse momentum 10 < pt < 50 GeV and rapidity abs(y) < 1.2. The ratio of the X(3872) and psi(2S) cross sections times their branching fractions into J/psi pi pi is measured as a function of pt. In addition, the fraction of X(3872) originating from B decays is determined. From these measurements the prompt X(3872) differential cross section times branching fraction as a function of pt is extracted. The pi pi mass spectrum of the J/psi pi pi system in the X(3872) decays is also investigated.