skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Constraints on the trilinear Higgs self coupling from precision observables

Abstract

We present the constraints on the trilinear Higgs self coupling that arise from loop effects in the W boson mass and the effective sine predictions. Here, we compute the contributions to these precision observables of two-loop diagrams featuring an anomalous trilinear Higgs self coupling. We explicitly show that the same anomalous contributions are found if the analysis of m W and sin 2θ$$lep\atop{eff}$$ is performed in a theory in which the scalar potential in the Standard Model Lagrangian is modified by an (in)finite tower of (Φ Φ) n terms with Φ the Higgs doublet. Lastly, we find that the bounds on the trilinear Higgs self coupling from precision observables are competitive with those coming from Higgs pair production.

Authors:
 [1];  [2];  [3]
  1. Sapienza Univ. of Rome Tre (Italy). Dept. of Mathematics and Physics; National Inst. of Nuclear Physics (INFN), Rome (Italy)
  2. Sapienza Univ. of Rome (Italy). La Sapienza, Dept. of Physics; National Inst. of Nuclear Physics (INFN), Rome (Italy)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1361236
Report Number(s):
BNL-113809-2017-JA
Journal ID: ISSN 1029-8479; KA2401012
Grant/Contract Number:
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 4; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Higgs Physics

Citation Formats

Degrassi, G., Fedele, M., and Giardino, P. P. Constraints on the trilinear Higgs self coupling from precision observables. United States: N. p., 2017. Web. doi:10.1007/JHEP04(2017)155.
Degrassi, G., Fedele, M., & Giardino, P. P. Constraints on the trilinear Higgs self coupling from precision observables. United States. doi:10.1007/JHEP04(2017)155.
Degrassi, G., Fedele, M., and Giardino, P. P. Thu . "Constraints on the trilinear Higgs self coupling from precision observables". United States. doi:10.1007/JHEP04(2017)155. https://www.osti.gov/servlets/purl/1361236.
@article{osti_1361236,
title = {Constraints on the trilinear Higgs self coupling from precision observables},
author = {Degrassi, G. and Fedele, M. and Giardino, P. P.},
abstractNote = {We present the constraints on the trilinear Higgs self coupling that arise from loop effects in the W boson mass and the effective sine predictions. Here, we compute the contributions to these precision observables of two-loop diagrams featuring an anomalous trilinear Higgs self coupling. We explicitly show that the same anomalous contributions are found if the analysis of mW and sin2θ$lep\atop{eff}$ is performed in a theory in which the scalar potential in the Standard Model Lagrangian is modified by an (in)finite tower of (Φ†Φ)n terms with Φ the Higgs doublet. Lastly, we find that the bounds on the trilinear Higgs self coupling from precision observables are competitive with those coming from Higgs pair production.},
doi = {10.1007/JHEP04(2017)155},
journal = {Journal of High Energy Physics (Online)},
number = 4,
volume = 2017,
place = {United States},
year = {Thu Apr 27 00:00:00 EDT 2017},
month = {Thu Apr 27 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

Save / Share:
  • Cited by 6
  • We present an analysis of multiple production of the CP-even (h{sup 0},H{sup 0}) and CP-odd (A{sup 0}) Higgs bosons as well as of the trilinear self-couplings in the context of the Minimal Supersymmetric Standard Model (MSSM) at the Future International Linear e{sup +}e{sup -} Collider (ILC). The analysis is based in the reactions e{sup +}e{sup -}{yields}bb-barh{sub i}h{sub i} with h{sub i} = h,H,A. We evaluate the total cross section of bb-barh{sub i}h{sub i} and calculate the total number of events considering the complete set of Feynman diagrams at tree-level. The numerical computation is done for the energy which is expectedmore » to be available at the ILC with a center-of-mass energy varies in the range 500{<=}{radical}(s){<=}1600 GeV and a luminosity 1000 fb{sup -1}.« less
  • Cited by 4
  • No abstract prepared.
  • Two of the nine measurements of sin{sup 2} {theta}; {sub eff} {sup lepton}, the effective weak interaction mixing angle, are found to be in significant conflict with the direct search limits for the standard model (SM) Higgs boson. Using a scale factor method, analogous to one used by the Particle Data Group, we assess the possible effect of these discrepancies on the SM fit of the Higgs boson mass. The scale factor fits increase the value of sin{sup 2} {theta}; {sub eff} {sup lepton} by as much as two standard deviations. The central value of the Higgs boson mass increasesmore » as much as a factor of 2, to {approx_equal}200 GeV, and the 95{percent} confidence level upper limit increases to as much as 750 GeV. The scale factor is based not simply on the discrepant measurements, as was the case in a previous analysis, but on an aggregate goodness-of-fit confidence level for the nine measurements and the limit. The method is generally applicable to fits in which one or more of a collection of measurements are in conflict with a physical boundary or limit. In the present context, the results suggest caution in drawing conclusions about the Higgs boson mass from the existing data. thinsp {copyright} {ital 1999} {ital The American Physical Society}« less