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Title: Maximizing the significance in Higgs boson pair analyses [Mad-Maximized Higgs Pair Analyses]

Abstract

Here, we study Higgs pair production with a subsequent decay to a pair of photons and a pair of bottoms at the LHC. We use the log-likelihood ratio to identify the kinematic regions which either allow us to separate the di-Higgs signal from backgrounds or to determine the Higgs self-coupling. We find that both regions are separate enough to ensure that details of the background modeling will not affect the determination of the self-coupling. Assuming dominant statistical uncertainties we determine the best precision with which the Higgs self-coupling can be probed in this channel. We finally comment on the same questions at a future 100 TeV collider.

Authors:
 [1];  [2];  [3]
  1. Univ. of Arizona, Tucson, AZ (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Univ. Heidelberg, Heidelberg (Germany)
  3. Durham Univ., Durham (United Kingdom)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1362142
Alternate Identifier(s):
OSTI ID: 1344603
Report Number(s):
FERMILAB-PUB-16-267-T; IPPP-16-72; MCNET-16-28; arXiv:1607.07441
Journal ID: ISSN 2470-0010; PRVDAQ; 1478050
Grant/Contract Number:
AC02-07CH11359; FG02-04ER41298
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 3; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Kling, Felix, Plehn, Tilman, and Schichtel, Peter. Maximizing the significance in Higgs boson pair analyses [Mad-Maximized Higgs Pair Analyses]. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.035026.
Kling, Felix, Plehn, Tilman, & Schichtel, Peter. Maximizing the significance in Higgs boson pair analyses [Mad-Maximized Higgs Pair Analyses]. United States. doi:10.1103/PhysRevD.95.035026.
Kling, Felix, Plehn, Tilman, and Schichtel, Peter. Wed . "Maximizing the significance in Higgs boson pair analyses [Mad-Maximized Higgs Pair Analyses]". United States. doi:10.1103/PhysRevD.95.035026. https://www.osti.gov/servlets/purl/1362142.
@article{osti_1362142,
title = {Maximizing the significance in Higgs boson pair analyses [Mad-Maximized Higgs Pair Analyses]},
author = {Kling, Felix and Plehn, Tilman and Schichtel, Peter},
abstractNote = {Here, we study Higgs pair production with a subsequent decay to a pair of photons and a pair of bottoms at the LHC. We use the log-likelihood ratio to identify the kinematic regions which either allow us to separate the di-Higgs signal from backgrounds or to determine the Higgs self-coupling. We find that both regions are separate enough to ensure that details of the background modeling will not affect the determination of the self-coupling. Assuming dominant statistical uncertainties we determine the best precision with which the Higgs self-coupling can be probed in this channel. We finally comment on the same questions at a future 100 TeV collider.},
doi = {10.1103/PhysRevD.95.035026},
journal = {Physical Review D},
number = 3,
volume = 95,
place = {United States},
year = {Wed Feb 22 00:00:00 EST 2017},
month = {Wed Feb 22 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 8works
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  • Cited by 8
  • The pairwise production of neutral Higgs bosons (h{sup 0}A{sup 0},H{sup 0}A{sup 0}) is analyzed in the context of the future linear colliders, such as the ILC and CLIC, within the general two-Higgs-doublet model (2HDM). The corresponding cross sections are computed at the one-loop level, including the full set of contributions at order O({alpha}{sub ew}{sup 3}) together with the leading O({alpha}{sub ew}{sup 4}) terms, in full compliance with the current phenomenological bounds and the stringent theoretical constraints inherent to the consistency of the model. We uncover regions across the 2HDM parameter space, mainly for low tan{beta}{approx}1 and moderate--and negative--values of themore » relevant {lambda}{sub 5} parameter, wherein the radiative corrections to the Higgs-pair production cross section, {sigma}(e{sup +}e{sup -{yields}}A{sup 0}h{sup 0}/A{sup 0}H{sup 0}), can comfortably reach |{delta}{sigma}|/{sigma}{approx}50%. This behavior can be traced back to the enhancement capabilities of the trilinear Higgs self-interactions--a trademark feature of the 2HDM, with no counterpart in the minimal supersymmetric standard model (MSSM). The corrections are strongly dependent on the actual value of {lambda}{sub 5} as well as on the Higgs mass spectrum. Interestingly enough, the quantum effects are positive for energies around {radical}(s){approx_equal}500 GeV, thereby producing a significant enhancement in the expected number of events precisely around the fiducial startup energy of the ILC. The Higgs-pair production rates can be substantial, typically a few tens of femtobarn, therefore amounting to a few thousand events per 500 fb{sup -1} of integrated luminosity. In contrast, the corrections are negative in the highest energy range (viz. {radical}(s){approx}1 TeV and above). We conclude that a precise measurement of the 2H final states could carry unambiguous footprints of an extended (nonsupersymmetric) Higgs sector. Finally, to better assess the scope of these effects, we compare the exclusive pairwise production of Higgs bosons with the inclusive gauge boson fusion channels leading to 2H+X final states, and also with the exclusive triple Higgs boson production. We find that these multiparticle final states can be highly complementary in the overall Higgs bosons search strategy.« less
  • We study double Higgs production in photon-photon collisions as a probe of the new dynamics of Higgs interactions in the framework of two Higgs doublet models. We analyze neutral Higgs bosons production and decay in the fusion processes, {gamma}{gamma}{yields}S{sub i}S{sub j}, S{sub i}=h{sup 0}, H{sup 0}, A{sup 0}, and show that both h{sup 0}h{sup 0} and A{sup 0}A{sup 0} production can be enhanced by threshold effects in the region E{sub {gamma}}{sub {gamma}}{approx_equal}2m{sub H{+-}}. Resonant effects due to the heavy Higgs H{sup 0} can also play a role in the cross section enhancement when it is allowed to decay to twomore » light CP-even h{sup 0} or to two light CP-odd A{sup 0} scalars. We have scanned the allowed parameter space of the two Higgs doublet model and found a vast region of the parameter space where the cross section is 2 orders of magnitude above the standard model cross section. We further show that the standard model experimental analysis can be used to discover or to constrain the two Higgs doublet model parameter space.« less
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