Search for dark matter particles in proton-proton collisions at sqrt(s) = 8 TeV using the razor variables

V. Khachatryan M. Besançon 1 F. Couderc 1 M. Dejardin 1 D. Denegri 1 B. Fabbro 1 J.L. Faure C. Favaro 1 F. Ferri S. Ganjour 1 A. Givernaud 1 P. Gras 1 G. Hamel De Monchenault 1 P. Jarry 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 N. Filipovic 2 R. Granier De Cassagnac 2 M. Jo 2 S. Lisniak 2 L. Mastrolorenzo 2 P. Mine 2 I.N. Naranjo 2 M. Nguyen 3 C. Ochando 2 G. Ortona 2 P. Paganini 2 P. Pigard 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 4 J. Andrea 4 A. Aubin 4 D. Bloch J.-M. Brom 4 M. Buttignol 4 E.C. Chabert 4 N. Chanon 4 C. Collard 4 E. Conte 4 X. Coubez 4 J.-C. Fontaine 4 D. Gele 4 U. Goerlach 4 C. Goetzmann 4 A.-C. Le Bihan 4 J.A. Merlin 4 K. Skovpen 4 P. Van Hove 4 S. Gadrat 5 S. Beauceron 6 C. Bernet 6 G. Boudoul 6 E. Bouvier 6 C.A. Carrillo Montoya 6 R. Chierici 6 D. Contardo 6 B. Courbon 6 P. Depasse 6 H. El Mamouni 6 J. Fan 6 J. Fay 6 S. Gascon 6 M. Gouzevitch 6 B. Ille 6 F. Lagarde 6 I.B. Laktineh 6 M. Lethuillier 6 L. Mirabito A.L. Pequegnot 6 S. Perries 6 J.D. Ruiz Alvarez 6 D. Sabes 6 V. Sordini 6 M. Vander Donckt 6 P. Verdier 6 S. Viret 6
Abstract : A search for dark matter particles directly produced in proton-proton collisions recorded by the CMS experiment at the LHC is presented. The data correspond to an integrated luminosity of 18.8 inverse femtobarns, at a center-of-mass energy of 8 TeV. The event selection requires at least two jets and no isolated leptons. The razor variables are used to quantify the transverse momentum balance in the jet momenta. The study is performed separately for events with and without jets originating from b quarks. The observed yields are consistent with the expected backgrounds and, depending on the nature of the production mechanism, dark matter production at the LHC is excluded at 90% confidence level for a mediator mass scale Lambda below 1 TeV. The use of razor variables yields results that complement those previously published.
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Submitted on : Wednesday, March 30, 2016 - 6:57:17 AM
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V. Khachatryan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Search for dark matter particles in proton-proton collisions at sqrt(s) = 8 TeV using the razor variables. Journal of High Energy Physics, Springer Verlag (Germany), 2016, 12, pp.88. ⟨10.1007/JHEP12(2016)088⟩. ⟨in2p3-01294908⟩

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