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Title: Is there room for C P violation in the top-Higgs sector?

Journal Article · · Physical Review D
 [1];  [2];  [3];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); New Mexico Consortium, Los Alamos, NM (United States)
  3. Nikhef (The Netherlands)

Here, we discuss direct and indirect probes of chirality-flipping couplings of the top quark to Higgs and gauge bosons, considering both CP-conserving and CP-violating observables, in the framework of the Standard Model effective field theory. In our analysis we include current and prospective constraints from collider physics, precision electroweak tests, flavor physics, and electric dipole moments (EDMs). We find that low-energy indirect probes are very competitive, even after accounting for long-distance uncertainties. In particular, EDMs put constraints on the electroweak CP-violating dipole moments of the top that are 2 to 3 orders of magnitude stronger than existing limits. The new indirect constraint on the top EDM is given by |dt| < 5×10–20e cm at 90% C.L.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1338796
Alternate ID(s):
OSTI ID: 1267544
Report Number(s):
LA-UR-16-21508; PRVDAQ; TRN: US1701774
Journal Information:
Physical Review D, Vol. 94, Issue 1; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 62 works
Citation information provided by
Web of Science

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Probing top quark electromagnetic dipole moments in single-top-plus-photon production text January 2013
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Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at sqrt(s) = 8 TeV text January 2014
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Cited By (13)

Global and optimal probes for the top-quark effective field theory at future lepton colliders journal October 2018
Supervised Deep Learning in High Energy Phenomenology: a Mini Review journal August 2019
Probing exotic phenomena at the interface of nuclear and particle physics with the electric dipole moments of diamagnetic atoms: A unique window to hadronic and semi-leptonic CP violation journal March 2017
Top quark electroweak couplings at future lepton colliders journal August 2017
CP-violating top quark couplings at future linear $$e^+e^-$$ e + e - colliders journal February 2018
Measuring the electric dipole moment of the electron in BaF journal November 2018
Global and optimal probes for the top-quark effective field theory at future lepton colliders text January 2018
CP Violation in Higgs-Gauge Interactions: From Tabletop Experiments to the LHC text January 2019
CP-violating top quark couplings at future linear $e^+e^-$ colliders text January 2018
Constraining the top-Higgs sector of the Standard Model Effective Field Theory text January 2016
Top quark electroweak couplings at future lepton colliders text January 2017
CP-violating top quark couplings at future linear $e^+e^-$ colliders text January 2017
Global and optimal probes for the top-quark effective field theory at future lepton colliders text January 2018

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