A search is presented for quark contact interactions and extra spatial dimensions in proton–proton collisions at s=8 TeV using dijet angular distributions. The search is based on a data set corresponding to an integrated luminosity of 19.7 fb−1 collected by the CMS detector at the CERN LHC. Dijet angular distributions are found to be in agreement with the perturbative QCD predictions that include electroweak corrections. Limits on the contact interaction scale from a variety of models at next-to-leading order in QCD corrections are obtained. A benchmark model in which only left-handed quarks participate is excluded up to a scale of 9.0 (11.7) TeV for destructive (constructive) interference at 95% confidence level. Lower limits between 5.9 and 8.4 TeV on the scale of virtual graviton exchange are extracted for the Arkani-Hamed–Dimopoulos–Dvali model of extra spatial dimensions.
Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2015). Search for quark contact interactions and extra spatial dimensions using dijet angular distributions in proton-proton collisions at √s = 8 TeV. PHYSICS LETTERS. SECTION B, 746, 79-99 [10.1016/j.physletb.2015.04.042].
Search for quark contact interactions and extra spatial dimensions using dijet angular distributions in proton-proton collisions at √s = 8 TeV
DINARDO, MAURO EMANUELEMembro del Collaboration Group
;FIORENDI, SARAMembro del Collaboration Group
;GEROSA, RAFFAELE ANGELOMembro del Collaboration Group
;GHEZZI, ALESSIOMembro del Collaboration Group
;GOVONI, PIETROMembro del Collaboration Group
;LUCCHINI, MARCO TOLIMANMembro del Collaboration Group
;MANZONI, RICCARDO ANDREAMembro del Collaboration Group
;MARTELLI, ARABELLAMembro del Collaboration Group
;MARZOCCHI, BADDERMembro del Collaboration Group
;MORONI, LUIGIMembro del Collaboration Group
;PAGANONI, MARCOMembro del Collaboration Group
;RAGAZZI, STEFANOMembro del Collaboration Group
;TABARELLI DE FATIS, TOMMASOMembro del Collaboration Group
;Branca, A;De Guio, FMembro del Collaboration Group
;
2015
Abstract
A search is presented for quark contact interactions and extra spatial dimensions in proton–proton collisions at s=8 TeV using dijet angular distributions. The search is based on a data set corresponding to an integrated luminosity of 19.7 fb−1 collected by the CMS detector at the CERN LHC. Dijet angular distributions are found to be in agreement with the perturbative QCD predictions that include electroweak corrections. Limits on the contact interaction scale from a variety of models at next-to-leading order in QCD corrections are obtained. A benchmark model in which only left-handed quarks participate is excluded up to a scale of 9.0 (11.7) TeV for destructive (constructive) interference at 95% confidence level. Lower limits between 5.9 and 8.4 TeV on the scale of virtual graviton exchange are extracted for the Arkani-Hamed–Dimopoulos–Dvali model of extra spatial dimensions.
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