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English

Search for extra dimensions in diphoton events from proton–proton collisions at √s=7 TeV in the ATLAS detector at the LHC

Contributors

ATLAS Collaboration

Collaborators

Abdelalim Aly, Ahmed Aly; Alexandre, Gauthier; Backes, Moritz; Barone, Gaetano; Bell, Paul; Bell, William; Benhar Noccioli, Eleonora; Blondel, Alain; Bucci, Francesca; Clark, Allan Geoffrey; Dao, Valerio; Doglioni, Caterina; Ferrere, Didier; Gadomski, Szymon; Gonzalez Sevilla, Sergio; Goulette, Marc; Iacobucci, Giuseppe; La Rosa, Alessandro; Lister, Alison; Martin Dit Latour, Bertrand; Mermod, Philippe; Mora Herrera, Maria Clemencia Rosario; Nektarijevic, Snezana; Nikolics, Katalin; Pasztor, Arpad; Picazio, Attilio; Pohl, Martin; Rosbach, Kilian; Rosselet, Laurent; Wu, Xin

Published in

New journal of physics, vol. 15, no. 043007, 34

Publication date

2013

Abstract

The large difference between the Planck scale and the electroweak scale, known as the hierarchy problem, is addressed in certain models through the postulate of extra spatial dimensions. A search for evidence of extra spatial dimensions in the diphoton channel has been performed using the full set of proton–proton collisions at √s = 7 TeV recorded in 2011 with the ATLAS detector at the CERN Large Hadron Collider. This dataset corresponds to an integrated luminosity of 4.9 fb−1. The diphoton invariant mass spectrum is observed to be in good agreement with the Standard Model expectation. In the context of the model proposed by Arkani–Hamed, Dimopoulos and Dvali, 95% confidence level lower limits of between 2.52 and 3.92 TeV are set on the ultraviolet cutoff scale MS depending on the number of extra dimensions and the theoretical formalism used. In the context of the Randall–Sundrum model, a lower limit of 2.06 (1.00) TeV at 95% confidence level is set on the mass of the lightest graviton for couplings of k/MPl = 0.1(0.01). Combining with the ATLAS dilepton searches based on the 2011 data, the 95% confidence level lower limit on the Randall–Sundrum graviton mass is further tightened to 2.23 (1.03) TeV for k/MPl = 0.1(0.01).

UNIGE affiliation entities

Citation (ISO format)

ATLAS Collaboration. Search for extra dimensions in diphoton events from proton–proton collisions at √s=7 TeV in the ATLAS detector at the LHC. In: New journal of physics, 2013, vol. 15, n° 043007, p. 34. doi: 10.1088/1367-2630/15/4/043007

Main files (1)

Article (Published version)

Identifiers

Additional URL for this publication

http://iopscience.iop.org/1367-2630/15/4/043007/

Journal ISSN

1367-2630
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290downloads

Technical informations

Creation

08/09/2014 12:19:00

First validation

08/09/2014 12:19:00

Update

13/10/2025 22:25:07

Status update

14/03/2023 21:44:40

Last indexation

10/11/2026 17:08:01
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