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750 GeV diphoton excess may not imply a 750 GeV resonance Highly Cited Paper

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Title
750 GeV diphoton excess may not imply a 750 GeV resonance
Author(s)
Won Sang Cho; Kim D.; Kong K.; Sung Hak Lim; Matchev K.T.; Park J.-C.; Myeonghun Park
Publication Date
2016-04
Journal
PHYSICAL REVIEW LETTERS, v.116, no.15, pp.151805 -
Publisher
AMER PHYSICAL SOC
Abstract
We discuss nonstandard interpretations of the 750 GeV diphoton excess recently reported by the ATLAS and CMS Collaborations which do not involve a new, relatively broad resonance with a mass near 750 GeV. Instead, we consider the sequential cascade decay of a much heavier, possibly quite narrow, resonance into two photons along with one or more additional particles. The resulting diphoton invariant mass signal is generically rather broad, as suggested by the data. We examine three specific event topologies - the antler, the sandwich, and the two-step cascade decay - and show that they all can provide a good fit to the observed published data. In each case, we delineate the preferred mass parameter space selected by the best fit. In spite of the presence of extra particles in the final state, the measured diphoton pT spectrum is moderate due to its anticorrelation with the diphoton invariant mass. We comment on the future prospects of discriminating with higher statistics between our scenarios, as well as from more conventional interpretations. © 2016 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/2503
DOI
10.1103/PhysRevLett.116.151805
ISSN
0031-9007
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
Files in This Item:
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