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Title: Higgs Pair Production as a Signal of Enhanced Yukawa Couplings

Here, we present a nontrivial correlation between the enhancement of the Higgs-fermion couplings and the Higgs pair production cross section in two Higgs doublet models with a flavor symmetry, with implications for LHC searches. This symmetry suppresses flavor-changing neutral couplings of the Higgs boson and allows for a partial explanation of the hierarchy in the Yukawa sector. After taking into account the constraints from electroweak precision measurements, Higgs coupling strength measurements, and unitarity and perturbativity bounds, we identify an interesting region of parameter space leading to enhanced Yukawa couplings as well as enhanced di-Higgs gluon fusion production at the LHC reach. This effect is visible in both the resonant and nonresonant contributions to the Higgs pair production cross section. We encourage dedicated searches based on differential distributions as a novel way to indirectly probe enhanced Higgs couplings to light fermions.
Authors:
 [1] ;  [2] ;  [3]
  1. Univ. Heidelberg, Heidelberg (Germany)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)
  3. Johannes Gutenberg Univ., Mainz (Germany)
Publication Date:
Report Number(s):
arXiv:1801.00363; FERMILAB-PUB-17-613-T; MITP-17-106
Journal ID: ISSN 0031-9007; PRLTAO; 1645657
Grant/Contract Number:
AC02-07CH11359
Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 121; Journal Issue: 2; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1460022
Alternate Identifier(s):
OSTI ID: 1423225

Bauer, Martin, Carena, Marcela, and Carmona, Adrian. Higgs Pair Production as a Signal of Enhanced Yukawa Couplings. United States: N. p., Web. doi:10.1103/PhysRevLett.121.021801.
Bauer, Martin, Carena, Marcela, & Carmona, Adrian. Higgs Pair Production as a Signal of Enhanced Yukawa Couplings. United States. doi:10.1103/PhysRevLett.121.021801.
Bauer, Martin, Carena, Marcela, and Carmona, Adrian. 2018. "Higgs Pair Production as a Signal of Enhanced Yukawa Couplings". United States. doi:10.1103/PhysRevLett.121.021801.
@article{osti_1460022,
title = {Higgs Pair Production as a Signal of Enhanced Yukawa Couplings},
author = {Bauer, Martin and Carena, Marcela and Carmona, Adrian},
abstractNote = {Here, we present a nontrivial correlation between the enhancement of the Higgs-fermion couplings and the Higgs pair production cross section in two Higgs doublet models with a flavor symmetry, with implications for LHC searches. This symmetry suppresses flavor-changing neutral couplings of the Higgs boson and allows for a partial explanation of the hierarchy in the Yukawa sector. After taking into account the constraints from electroweak precision measurements, Higgs coupling strength measurements, and unitarity and perturbativity bounds, we identify an interesting region of parameter space leading to enhanced Yukawa couplings as well as enhanced di-Higgs gluon fusion production at the LHC reach. This effect is visible in both the resonant and nonresonant contributions to the Higgs pair production cross section. We encourage dedicated searches based on differential distributions as a novel way to indirectly probe enhanced Higgs couplings to light fermions.},
doi = {10.1103/PhysRevLett.121.021801},
journal = {Physical Review Letters},
number = 2,
volume = 121,
place = {United States},
year = {2018},
month = {7}
}