TY - JOUR
T1 - Single Higgs production in association with a photon at electron-positron colliders in extended Higgs models
AU - Kanemura, Shinya
AU - Mawatari, Kentarou
AU - Sakurai, Kodai
N1 - Funding Information:
The work of S. K. is supported in part by Grant-in-Aid for Scientific Research on Innovative Areas, the Ministry of Education, Culture, Sports, Science and Technology, Grants No. 16H06492 and No. 18H04587 and Grant H2020-MSCA-RISE-2014 No. 645722 (Non-Minimal Higgs). The work of K. M. was supported in part by JSPS KAKENHI Grant No. 18K03648. The work of K. S. was supported in part by JSPS KAKENHI Grant No. 18J12866.
Publisher Copyright:
© 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP .
PY - 2019/2/1
Y1 - 2019/2/1
N2 - We study associated Higgs production with a photon at electron-positron colliders, e+e-→hγ, in various extended Higgs models, such as the inert doublet model, the inert triplet model, and the two Higgs doublet model. The cross section in the standard model (SM) is maximal around s=250 GeV, and we present how and how much the new physics can enhance or reduce the production rate. We also discuss the correlation with the h→γγ and h→Zγ decay rates. We find that, with a sizable coupling to a SM-like Higgs boson, charged scalars can give considerable contributions to both the production and the decay if their masses are around 100 GeV. Under the theoretical constraints from vacuum stability and perturbative unitarity as well as the current constraints from the Higgs measurements at the LHC, the production rate can be enhanced from the SM prediction at most by a factor of 2 in the inert doublet model. In the inert triplet model, in addition, we find a particular parameter region where the hγ production significantly increases by a factor of about 6 to 8, but the h→γγ decay still remains as in the SM. In the two Higgs doublet model, possible deviations from the SM prediction are minor in the viable parameter space.
AB - We study associated Higgs production with a photon at electron-positron colliders, e+e-→hγ, in various extended Higgs models, such as the inert doublet model, the inert triplet model, and the two Higgs doublet model. The cross section in the standard model (SM) is maximal around s=250 GeV, and we present how and how much the new physics can enhance or reduce the production rate. We also discuss the correlation with the h→γγ and h→Zγ decay rates. We find that, with a sizable coupling to a SM-like Higgs boson, charged scalars can give considerable contributions to both the production and the decay if their masses are around 100 GeV. Under the theoretical constraints from vacuum stability and perturbative unitarity as well as the current constraints from the Higgs measurements at the LHC, the production rate can be enhanced from the SM prediction at most by a factor of 2 in the inert doublet model. In the inert triplet model, in addition, we find a particular parameter region where the hγ production significantly increases by a factor of about 6 to 8, but the h→γγ decay still remains as in the SM. In the two Higgs doublet model, possible deviations from the SM prediction are minor in the viable parameter space.
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U2 - 10.1103/PhysRevD.99.035023
DO - 10.1103/PhysRevD.99.035023
M3 - Article
AN - SCOPUS:85062595689
VL - 99
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 3
M1 - 035023
ER -