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

Journal Article · · Journal of High Energy Physics (Online)
 [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)

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.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1247505
Report Number(s):
FERMILAB-PUB-15-569-T; arXiv:1512.06877; 1411073; TRN: US1601639
Journal Information:
Journal of High Energy Physics (Online), Vol. 2016, Issue 3; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (16)

A global view on the Higgs self-coupling at lepton colliders journal February 2018
Learning from Higgs physics at future Higgs factories journal December 2017
Exotic decays of the 125 GeV Higgs boson at future e + e colliders journal June 2017
Precision Higgs physics at the CEPC journal April 2019
Charged lepton flavor violating Higgs decays at future $$e^+e^-$$ e + e - colliders journal October 2018
FCC Physics Opportunities: Future Circular Collider Conceptual Design Report Volume 1 journal June 2019
The leptonic future of the Higgs text January 2017
FCC Physics Opportunities text January 2019
Improved Formalism for Precision Higgs Coupling Fits text January 2017
A global view on the Higgs self-coupling at lepton colliders text January 2018
Learning from Higgs Physics at Future Higgs Factories text January 2017
A global view on the Higgs self-coupling at lepton colliders text January 2017
Improved Formalism for Precision Higgs Coupling Fits text January 2018
A global view on the Higgs self-coupling at lepton colliders text January 2017
Probing 6D Operators at Future $e^-e^+$ Colliders text January 2017
Charged lepton flavor violating Higgs decays at future $e^+e^-$ colliders text January 2017

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