Detecting a boosted diboson resonance

Agashe, Kaustubh; Collins, Jack H.; Du, Peizhi; Hong, Sungwoo; Kim, Doojin; Mishra, Rashmish K.

doi:10.1007/jhep11(2018)027

Title: Detecting a boosted diboson resonance

Journal Article · Tue Nov 06 00:00:00 EST 2018 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep11(2018)027· OSTI ID:1611216

Agashe, Kaustubh ^[1]; Collins, Jack H. ^[2]; Du, Peizhi ^[1]; Hong, Sungwoo ^[3]; Kim, Doojin ^[4];

^[5]

Univ. of Maryland, College Park, MD (United States)
Univ. of Maryland, College Park, MD (United States); Johns Hopkins Univ., Baltimore, MD (United States)
Cornell Univ., Ithaca, NY (United States)
European Organization for Nuclear Research (CERN), Geneva (Switzerland); Univ. of Arizona, Tucson, AZ (United States)
Istituto Nazionale di Fisica Nucleare (INFN), Pisa (Italy)

New light scalar particles in the mass range of hundreds of GeV, decaying into a pair of W/Z bosons can appear in several extensions of the SM. The focus of collider studies for such a scalar is often on its direct production, where the scalar is typically only mildly boosted. The observed W/Z are therefore well-separated, allowing analyses for the scalar resonance in a standard fashion as a low-mass diboson resonance. In this work we instead focus on the scenario where the direct production of the scalar is suppressed, and it is rather produced via the decay of a significantly heavier (a few TeV mass) new particle, in conjunction with SM particles. Such a process results in the scalar being highly boosted, rendering the W/Z’s from its decay merged. The final state in such a decay is a “fat” jet, which can be either four pronged (for fully hadronic W/Z decays), or may be like a W/Z jet, but with leptons buried inside (if one of the W/Z decays leptonically). In addition, this fat jet has a jet mass that can be quite different from that of the W/Z/Higgs/top quark-induced jet, and may be missed by existing searches. In this work, we develop dedicated algorithms for tagging such multi-layered “boosted dibosons” at the LHC. As a concrete application, we discuss an extension of the standard warped extra dimensional framework where such a light scalar can arise. We demonstrate that the use of these algorithms gives sensitivity in mass ranges that are otherwise poorly constrained.

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Research Organization:: Univ. of Arizona, Tucson, AZ (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF); Korean Research Foundation (KRF)

Grant/Contract Number:: SC0009913; FG02-13ER41976; PHY-1620074; PHY-1719877

OSTI ID:: 1611216

Journal Information:: Journal of High Energy Physics (Online), Vol. 2018, Issue 11; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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