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High Energy Physics - Phenomenology

arXiv:1302.5694 (hep-ph)
[Submitted on 22 Feb 2013 (v1), last revised 13 Jun 2013 (this version, v3)]

Title:Status of invisible Higgs decays

Authors:G. Belanger, B. Dumont, U. Ellwanger, J. F. Gunion, S. Kraml
View a PDF of the paper titled Status of invisible Higgs decays, by G. Belanger and 4 other authors
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Abstract:We analyze the extent to which the LHC and Tevatron results as of the end of 2012 constrain invisible (or undetected) decays of the Higgs boson-like state at ~ 125 GeV. To this end we perform global fits for several cases: 1) a Higgs boson with Standard Model (SM) couplings but additional invisible decay modes; 2) SM couplings to fermions and vector bosons, but allowing for additional new particles modifying the effective Higgs couplings to gluons and photons; 3) no new particles in the loops but tree-level Higgs couplings to the up-quarks, down-quarks and vector bosons, relative to the SM, treated as free parameters. We find that in the three cases invisible decay rates of 23%, 61%, 88%, respectively, are consistent with current data at 95% confidence level (CL). Limiting the coupling to vector bosons, CV, to CV < 1 in case 3) reduces the allowed invisible branching ratio to 56% at 95% CL. Requiring in addition that the Higgs couplings to quarks have the same sign as in the SM, an invisible rate of up to 36% is allowed at 95% CL. We also discuss direct probes of invisible Higgs decays, as well as the interplay with dark matter searches.
Comments: 14 pages, 8 figures; v2: extended discussion on ZH associated production, references added, minor corrections; v4: matches final version published in Phys. Lett. B
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: LAPTH-013/13, LPSC 13039, LPT 12-53, UCD-2013-2
Cite as: arXiv:1302.5694 [hep-ph]
  (or arXiv:1302.5694v3 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1302.5694
arXiv-issued DOI via DataCite
Journal reference: Physics Letters B 723 (2013), pp. 340-347
Related DOI: https://doi.org/10.1016/j.physletb.2013.05.024
DOI(s) linking to related resources

Submission history

From: Beranger Dumont [view email]
[v1] Fri, 22 Feb 2013 20:26:18 UTC (1,774 KB)
[v2] Wed, 15 May 2013 13:06:41 UTC (1,775 KB)
[v3] Thu, 13 Jun 2013 12:10:08 UTC (1,775 KB)
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