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

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{sup -1}, we find that graviton exchange could be discriminated against the scalar one with same mass M{sub R} and events rate, up to M{sub R} Asymptotically-Equal-To 3.2TeV.

Authors:
; ; ; ; ;  [1];  [2];  [3];  [4];  [2];  [3]
  1. Deutsches Elektronen-Synchrotron DESY, D-15738 Zeuthen (Germany)
  2. (India)
  3. (Belarus)
  4. (Italy)
Publication Date:
OSTI Identifier:
22075671
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1492; Journal Issue: 1; Conference: QCD-WORK 2012: International workshop on quantum chromodynamics: Theory and experiment, Lecce (Italy), 18-21 Jun 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; CERN LHC; EXCITATION; GRAVITONS; INCLUSIVE INTERACTIONS; QUANTUM CHROMODYNAMICS; QUANTUM NUMBERS; S CHANNEL; SPIN; TEV RANGE

Citation Formats

Kumar, M. C., Mathews, Prakash, Pankov, A. A., Paver, N., Ravindran, V., Tsytrinov, A. V., Saha Institute of Nuclear Physics, Kolkata 700064, Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746 Gomel, University of Trieste and INFN-Trieste Section, 34100 Trieste, Harish-Chandra Research Institute, Allahabad 211 019, and Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746 Gomel. Spin determination of heavy s-channel diphoton resonances at the LHC. United States: N. p., 2012. Web. doi:10.1063/1.4763487.
Kumar, M. C., Mathews, Prakash, Pankov, A. A., Paver, N., Ravindran, V., Tsytrinov, A. V., Saha Institute of Nuclear Physics, Kolkata 700064, Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746 Gomel, University of Trieste and INFN-Trieste Section, 34100 Trieste, Harish-Chandra Research Institute, Allahabad 211 019, & Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746 Gomel. Spin determination of heavy s-channel diphoton resonances at the LHC. United States. doi:10.1063/1.4763487.
Kumar, M. C., Mathews, Prakash, Pankov, A. A., Paver, N., Ravindran, V., Tsytrinov, A. V., Saha Institute of Nuclear Physics, Kolkata 700064, Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746 Gomel, University of Trieste and INFN-Trieste Section, 34100 Trieste, Harish-Chandra Research Institute, Allahabad 211 019, and Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746 Gomel. Tue . "Spin determination of heavy s-channel diphoton resonances at the LHC". United States. doi:10.1063/1.4763487.
@article{osti_22075671,
title = {Spin determination of heavy s-channel diphoton resonances at the LHC},
author = {Kumar, M. C. and Mathews, Prakash and Pankov, A. A. and Paver, N. and Ravindran, V. and Tsytrinov, A. V. and Saha Institute of Nuclear Physics, Kolkata 700064 and Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746 Gomel and University of Trieste and INFN-Trieste Section, 34100 Trieste and Harish-Chandra Research Institute, Allahabad 211 019 and Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746 Gomel},
abstractNote = {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{sup -1}, we find that graviton exchange could be discriminated against the scalar one with same mass M{sub R} and events rate, up to M{sub R} Asymptotically-Equal-To 3.2TeV.},
doi = {10.1063/1.4763487},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1492,
place = {United States},
year = {2012},
month = {10}
}