TITLE

Spin determination of heavy s-channel diphoton resonances at the LHC

AUTHOR(S)
Kumar, M. C.; Mathews, Prakash; Pankov, A. A.; Paver, N.; Ravindran, V.; Tsytrinov, A. V.
PUB. DATE
October 2012
SOURCE
AIP Conference Proceedings;Oct2012, Vol. 1492 Issue 1, p28
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Diphoton events at the LHC can provide clean signals of heavy neutral quantum states predicted by New Physics models. These non-standard particles would manifest themselves by s-channel peaks in inclusive distributions in the diphoton invariant mass. Once discovered, the quantum numbers of such a diphoton resonance need to be determined in order to identify the associated non-standard physics, in the first place the spin by an angular analysis of the events. We here discuss this problem by comparing, as competing sources of a diphoton resonance, the spin-2 Randall-Sundrum graviton excitation and a spin-0 scalar exchange, by means of a specific angular-integrated asymmetry predicted theoretically at next-to-leading order in QCD. For the LHC with nominal energy of 14 TeV and integrated luminosity 100 fb-1, we find that graviton exchange could be discriminated against the scalar one with same mass MR and events rate, up to MR≃3.2TeV.
ACCESSION #
82762874

 

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