Unraveling the physics behind modified Higgs couplings: LHC versus a Higgs factory

Giddings, Steven B.; Liu, Tao; Low, Ian; Mintun, Eric

doi:10.1103/PhysRevD.88.095003

Title: Unraveling the physics behind modified Higgs couplings: LHC versus a Higgs factory

Journal Article · Tue Nov 05 00:00:00 EST 2013 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.88.095003· OSTI ID:1602032

Giddings, Steven B. ^[1]; Liu, Tao ^[1]; Low, Ian ^[2]; Mintun, Eric ^[1]

Univ. of California, Santa Barbara, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States); Univ. of California, Santa Barbara, CA (United States). Kavli Inst. for Theoretical Physics

Strongly modified hγγ and hgg couplings indicate new electroweak and color mediators, respectively, with a light mass and a significant coupling to the Higgs boson. We point out the Higgs boson could have a significant decay width into the mediators. This represents one new class of exotic Higgs decay possibilities: off-shell exotic Higgs decays. We then propose uncovering the hidden new physics through such exotic decays. A great advantage of this strategy is that we can directly probe the couplings between the Higgs boson and the mediators, which is hard to achieve by using other methods. Focusing on the electroweak mediators, we study a simplified model using as an example final states with tau leptons and neutrinos. Because one of the mediators is off shell and its decay products are extremely soft, it is challenging to make a discovery at the Large Hadron Collider. A Higgs factory such as the International Linear Collider, however, could serve as a discovery machine for such exotic Higgs decays even in an early stage.

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Research Organization:: Univ. of California, Santa Barbara, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Simons Foundation

Grant/Contract Number:: SC0011702; AC02-06CH11357; FG02-91ER40684; FG02-91ER40618; PHY11-25915

OSTI ID:: 1602032

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 88, Issue 9; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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