## “School of Particles”

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Paper   IPM / Particles / 12358
School of Particles and Accelerator
Title:   Search for signatures of extra dimensions in the diphoton mass spectrum at the Large Hadron Collider
Author(s):
 1 Hessamadin Arfaei 2 Hamed Bakhshiansohi 3 Seyed Mohsen Etesami 4 Ali Fahim 5 Majid Hashemi 6 Hoda Hesari 7 Abideh Jafari 8 Mohsen Khakzad 9 A Mohammadi 10 Mojtaba Mohammadi Najafabadi 11 Saeid Paktinat 12 Batool Safarzadeh 13 Maryam Zeinali
Status:   Published
Journal: Phys. Rev. Lett.
No.:  111801
Vol.:  108
Year:  2011
Supported by:  IPM
Abstract:
search for signatures of extra dimensions in the diphoton invariant-mass spectrum has been performed with the CMS detector at the LHC. No excess of events above the standard model expectation is observed using a data sample collected in proton-proton collisions at sqrt(s) = 7 TeV corresponding to an integrated luminosity of 2.2 inverse femtobarns. In the context of the large-extra-dimensions model, lower limits are set on the effective Planck scale in the range of 2.3-3.8 TeV at the 95

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