Journal articles
Observation of Upsilon(1S) pair production in proton-proton collisions at sqrt(s) = 8 TeV
V. Khachatryan
M. Besançon
1
F. Couderc
1
M. Dejardin
1
D. Denegri
1
B. Fabbro
1
J.L. Faure
1
C. Favaro
1
F. Ferri
1
S. Ganjour
1
S. Ghosh
1
A. Givernaud
1
P. Gras
1
G. Hamel De Monchenault
1
P. Jarry
1
I. Kucher
1
E. Locci
1
M. Machet
1
J. Malcles
1
J. Rander
1
A. Rosowsky
1
M. Titov
1
A. Zghiche
1
A. Abdulsalam
2
I. Antropov
2
S. Baffioni
2
F. Beaudette
2
P. Busson
2
L. Cadamuro
2
E. Chapon
2
C. Charlot
2
O. Davignon
2
R. Granier De Cassagnac
2
M. Jo
2
S. Lisniak
2
P. Mine
2
C. Ochando
2
M. Nguyen
2
G. Ortona
2
P. Paganini
2
P. Pigard
2
S. Regnard
2
R. Salerno
2
Y. Sirois
2
T. Strebler
2
Y. Yilmaz
2
A. Zabi
2
J.-L. Agram
3
J. Andrea
3
A. Aubin
3
D. Bloch
3
J.-M. Brom
3
M. Buttignol
3
E.C. Chabert
3
N. Chanon
3
C. Collard
3
E. Conte
3
X. Coubez
3
J.-C. Fontaine
3
D. Gele
3
U. Goerlach
3
A.-C. Le Bihan
3
K. Skovpen
3
P. Van Hove
3
S. Gadrat
4
S. Beauceron
5
C. Bernet
5
G. Boudoul
5
E. Bouvier
5
C.A. Carrillo Montoya
5
R. Chierici
5
D. Contardo
5
B. Courbon
5
P. Depasse
5
H. El Mamouni
5
J. Fan
5
J. Fay
5
S. Gascon
5
M. Gouzevitch
5
G. Grenier
5
B. Ille
5
F. Lagarde
5
I.B. Laktineh
5
M. Lethuillier
5
L. Mirabito
5
A.L. Pequegnot
5
S. Perries
5
A. Popov
5
D. Sabes
5
V. Sordini
5
M. Vander Donckt
5
P. Verdier
5
S. Viret
5
I. Antropov 2
Author
S. Baffioni 2
Author IdHAL : stephanie-barrillon ORCID : https://orcid.org/0000-0002-7075-1673
F. Beaudette 2
Author
P. Busson 2
Author
R. Granier De Cassagnac 2
Author IdHAL : raphgrandecass arXiv : https://arxiv.org/a/rgdc ORCID : https://orcid.org/0000-0002-1275-7292
M. Jo 2
Author
S. Lisniak 2
Author
P. Mine 2
Author
C. Ochando 2
Author
M. Nguyen 2
Author
G. Ortona 2
Author
P. Paganini 2
Author IdHAL : pascal-paganini ORCID : https://orcid.org/0000-0001-9580-683X
B. Ille 5
Author
F. Lagarde 5
Author
I.B. Laktineh 5
Author
M. Lethuillier 5
Author IdHAL : morgan-lethuillier ORCID : https://orcid.org/0000-0001-6185-2045
D. Sabes 5
Author
V. Sordini 5
Author IdHAL : viola-sordini ORCID : https://orcid.org/0000-0003-0885-824X
M. Vander Donckt 5
Author
P. Verdier 5
Author
S. Viret 5
Author
1
IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (CEA Saclay
F-91191 Gif sur Yvette cedex - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/IRFU (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
2
LLR - Laboratoire Leprince-Ringuet (Route de Saclay - 91128 Palaiseau Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- X - École polytechnique (École polytechnique, 91128 Palaiseau Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7638 (France)
3
DRS-IPHC - Département Recherches Subatomiques (23 rue du Loess - BP28 67037 Strasbourg cedex 2 - France)
- IPHC - Institut Pluridisciplinaire Hubert Curien (23 rue Loess - BP 28 67037 Strasbourg Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- UNISTRA - Université de Strasbourg (4 rue Blaise Pascal - CS 90032 - 67081 Strasbourg cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7178 (France)
4
CC-IN2P3 - Centre de Calcul de l'IN2P3 (Domaine scientifique de La Doua
43 bd du 11 Novembre 1918
69622 Villeurbanne Cedex - France)
5
IPNL - Institut de Physique Nucléaire de Lyon (Campus LyonTech-la Doua
Bâtiment Paul DIRAC
4 Rue Enrico Fermi
69622 Villeurbanne Cedex - France)
- UCBL - Université Claude Bernard Lyon 1 (43, boulevard du 11 novembre 1918, 69622 Villeurbanne cedex - France)
- Université de Lyon (92 rue Pasteur - CS 30122, 69361 Lyon Cedex 07 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5822 (France)
Abstract : Pair production of Upsilon(1S) mesons is observed at the LHC in proton-proton collisions at sqrt(s) = 8 TeV by the CMS experiment in a data sample corresponding to an integrated luminosity of 20.7 inverse-femtobarns. Both Upsilon(1S) candidates are fully reconstructed via their decays to mu+ mu-. The fiducial acceptance region is defined by an absolute Upsilon(1S) rapidity smaller than 2.0. The fiducial cross section for the production of Upsilon(1S) pairs, assuming that both mesons decay isotropically, is measured to be 68.8 +/- 12.7 (stat) +/- 7.4 (syst) +/- 2.8 (B) pb, where the third uncertainty comes from the uncertainty in the branching fraction of Upsilon(1S) decays to mu+ mu-. Assuming instead that the Upsilon(1S) mesons are produced with different polarizations leads to variations in the measured cross section in the range from -38% to +36%.
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Journal articles
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http://hal.in2p3.fr/in2p3-01387006
Contributor : Sylvie Flores <>
Submitted on : Tuesday, October 25, 2016 - 7:17:56 AM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM
Contributor : Sylvie Flores <>
Submitted on : Tuesday, October 25, 2016 - 7:17:56 AM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM
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- HAL Id : in2p3-01387006, version 1
- ARXIV : 1610.07095
- DOI : 10.1007/JHEP05(2017)013
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Citation
V. Khachatryan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Observation of Upsilon(1S) pair production in proton-proton collisions at sqrt(s) = 8 TeV. Journal of High Energy Physics, Springer Verlag (Germany), 2017, 05, pp.013. ⟨10.1007/JHEP05(2017)013⟩. ⟨in2p3-01387006⟩
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