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Title: Beyond Higgs couplings: Probing the Higgs with angular observables at future e$$^{+}$$e$$^{-}$$ colliders

Abstract

Here, we study angular observables in the $$ {e}^{+}{e}^{-}\to ZH\to {\ell}^{+}{\ell}^{-}b\overline{b} $$ channel at future circular e$$^{+}$$ e$$^{-}$$ colliders such as CEPC and FCC-ee. Taking into account the impact of realistic cut acceptance and detector effects, we forecast the precision of six angular asymmetries at CEPC (FCC-ee) with center-of-mass energy $$ \sqrt{s}=240 $$ GeV and 5 (30) ab$$^{-1}$$ integrated luminosity. We then determine the projected sensitivity to a range of operators relevant for he Higgs-strahlung process in the dimension-6 Higgs EFT. Our results show that angular observables provide complementary sensitivity to rate measurements when constraining various tensor structures arising from new physics. We further find that angular asymmetries provide a novel means of both probing BSM corrections to the HZγ coupling and constraining the “blind spot” in indirect limits on supersymmetric scalar top partners.

Authors:
 [1];  [2]; ORCiD logo [3];  [2]
  1. Univ. of California, Santa Barbara, CA (United States)
  2. Chinese Academy of Sciences (CAS), Beijing (China)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
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:
1247505
Report Number(s):
FERMILAB-PUB-15-569-T; arXiv:1512.06877
Journal ID: ISSN 1029-8479; 1411073; TRN: US1601639
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 3; 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; effective field theories; Higgs physics

Citation Formats

Craig, Nathaniel, Gu, Jiayin, Liu, Zhen, and Wang, Kechen. Beyond Higgs couplings: Probing the Higgs with angular observables at future e$^{+}$e$^{-}$ colliders. United States: N. p., 2016. Web. doi:10.1007/JHEP03(2016)050.
Craig, Nathaniel, Gu, Jiayin, Liu, Zhen, & Wang, Kechen. Beyond Higgs couplings: Probing the Higgs with angular observables at future e$^{+}$e$^{-}$ colliders. United States. doi:10.1007/JHEP03(2016)050.
Craig, Nathaniel, Gu, Jiayin, Liu, Zhen, and Wang, Kechen. Wed . "Beyond Higgs couplings: Probing the Higgs with angular observables at future e$^{+}$e$^{-}$ colliders". United States. doi:10.1007/JHEP03(2016)050. https://www.osti.gov/servlets/purl/1247505.
@article{osti_1247505,
title = {Beyond Higgs couplings: Probing the Higgs with angular observables at future e$^{+}$e$^{-}$ colliders},
author = {Craig, Nathaniel and Gu, Jiayin and Liu, Zhen and Wang, Kechen},
abstractNote = {Here, we study angular observables in the $ {e}^{+}{e}^{-}\to ZH\to {\ell}^{+}{\ell}^{-}b\overline{b} $ channel at future circular e$^{+}$ e$^{-}$ colliders such as CEPC and FCC-ee. Taking into account the impact of realistic cut acceptance and detector effects, we forecast the precision of six angular asymmetries at CEPC (FCC-ee) with center-of-mass energy $ \sqrt{s}=240 $ GeV and 5 (30) ab$^{-1}$ integrated luminosity. We then determine the projected sensitivity to a range of operators relevant for he Higgs-strahlung process in the dimension-6 Higgs EFT. Our results show that angular observables provide complementary sensitivity to rate measurements when constraining various tensor structures arising from new physics. We further find that angular asymmetries provide a novel means of both probing BSM corrections to the HZγ coupling and constraining the “blind spot” in indirect limits on supersymmetric scalar top partners.},
doi = {10.1007/JHEP03(2016)050},
journal = {Journal of High Energy Physics (Online)},
number = 3,
volume = 2016,
place = {United States},
year = {2016},
month = {3}
}

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