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Search for third-generation scalar leptoquarks in the t-tau channel in proton-proton collisions at 8 TeV

V. Khachatryan M. Besancon 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 A. Givernaud 1 P. Gras 1 G. Hamel De Monchenault 1 P. Jarry 1 E. Locci 1 J. Malcles 1 J. Rander 1 A. Rosowsky 1 M. Titov 1 A. Zghiche 1 S. Baffioni 2 F. Beaudette 2 P. Busson 2 L. Cadamuro 2 E. Chapon 2 C. Charlot 2 T. Dahms 2 O. Davignon 2 N. Filipovic 2 A. Florent 2 R. Granier De Cassagnac 2 L. Mastrolorenzo 2 P. Mine 2 I.N. Naranjo 2 M. Nguyen 2 C. Ochando 2 G. Ortona 2 P. Paganini 2 S. Regnard 2 R. Salerno 2 J.B. Sauvan 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 J.-C. Fontaine 3 D. Gele 3 U. Goerlach 3 C. Goetzmann 3 A.-C. Le Bihan 3 J.A. Merlin 3 K. Skovpen 3 P. Van Hove 3 S. Gadrat 4 S. Beauceron 5 N. Beaupere 5 C. Bernet 5 G. Boudoul 5 E. Bouvier 5 S. Brochet 5 C.A. Carrillo Montoya 5 J. Chasserat 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 B. Ille 5 I.B. Laktineh 5 M. Lethuillier 5 L. Mirabito 5 A.L. Pequegnot 5 S. Perries 5 J.D. Ruiz Alvarez 5 D. Sabes 5 L. Sgandurra 5 V. Sordini 5 M. Vander Donckt 5 P. Verdier 5 S. Viret 5 H. Xiao 5
1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 LLR - Laboratoire Leprince-Ringuet
3 IPHC - Institut Pluridisciplinaire Hubert Curien
4 CC-IN2P3 - Centre de Calcul de l'IN2P3
5 IPNL - Institut de Physique Nucléaire de Lyon
Abstract : A search for pair production of third-generation scalar leptoquarks decaying to top quark and tau lepton pairs is presented using proton-proton collision data at a center-of-mass energy of sqrt(s)=8 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 inverse femtobarns. The search is performed using events that contain an electron or a muon, a hadronically decaying tau lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a tau lepton, the existence of pair produced, charge -1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a tau lepton, and is also directly applicable to pair produced bottom squarks decaying via the R-parity violating coupling lambda'[333].
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http://hal.in2p3.fr/in2p3-01138553
Contributor : Sylvie Flores <>
Submitted on : Thursday, April 2, 2015 - 10:59:39 AM
Last modification on : Friday, June 5, 2020 - 10:52:08 AM

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IN2P3 | IPNL | LLR | CNRS | X | X-LLR | DSM-IRFU | DRS-IPHC | IPHC | CEA | CEA-UPSAY | UNIV-PARIS-SACLAY | UNIV-LYON1 | CEA-DRF | SITE-ALSACE | X-DEP-PHYS | IP2I | UDL

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V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Search for third-generation scalar leptoquarks in the t-tau channel in proton-proton collisions at 8 TeV. Journal of High Energy Physics, Springer, 2015, 1507, pp.42. ⟨10.1007/JHEP07(2015)042⟩. ⟨in2p3-01138553⟩

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