Probe of CP violation in top quark pair production at hadron supercolliders.
نویسندگان
چکیده
We show that measurement of the difference in the transverse energy distribution of leptons and antileptons’ from tt events at hsdron colliders provides an interesting probe of CP violation in the Higgs sector. We predict a CP violating asymmetry at the 10T3 level. Submitted to Physica. Review Letters PACS numbers: 11.30.Er, 12.15.Cc, 13.85.Qk * Work supported by the Departlnent of Energy, contract DE-AC03-76SF00515. . . . .
منابع مشابه
CP Violation in Top Quark Pair Production at Hadron Colliders
CP violating effects in top quark pair production at the future 2 TeV pp̄ Tevatron and 14 TeV pp LHC colliders are investigated. We study three kinds of CP violating sources: the supersymmetric CP-odd phase of the stop trilinear soft breaking term: arg(At), the CP-odd parameter in two-Higgs doublet extensions of the standard model(2HDM), and the model-independent top quark chromoelectric dipole ...
متن کاملEffects of Higgs sector CP violation in top-quark pair production at the LHC∗
A striking manifestation of CP violation in the electroweak symmetry breaking sector would be the existence of neutral Higgs boson(s) with undefined CP parity. We analyse signatures of such a boson, with a mass of about 300 GeV or larger, produced in high energy proton-proton collisions at LHC energies in its top-quark antitop-quark decay channel. The large irreducible tt̄ background is taken in...
متن کاملCP Violation in the Top-Quark Pair Production at a Next Linear Collider
We provide a detailed, model-independent, study for CP violation effects due to the T -odd top-quark electric dipole moment (EDM) and weak dipole moment (WDM) in the top-quark pair production via e+e− and two-photon annihilation at a next e+e− linear collider (NLC). There are two methods in detecting CP violation effects in these processes. One method makes use of measurements of various spin c...
متن کاملT -odd Gluon–top-quark Couplings at Lhc *
The T –odd top–quark chromoelectric dipole moment, d t , is probed through top–quark– pair production via gluon fusion at the CERN LHC with the possibility of having polarized proton beams in account. At 1-σ level, the typical CP-odd lepton energy and tensor correlations enable us to measure Re(d t) and Im(d t) up to the order of 10 −18 (g s cm) in the unpolarized case and the initial CP-odd gl...
متن کاملFinding the leptonic WW decay mode of a heavy Higgs boson at hadron supercolliders.
We reanalyze the extraction of the heavy Higgs boson signal H → WW → l̄ν, lν̄ (l = e or μ) from the Standard Model background at hadron supercolliders, taking into account revised estimates of the top quark background. With new acceptance criteria the detection of the signal remains viable. Requiring a forward jet-tag, a central jet-veto, and a large relative transverse momentum of the two charge...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 69 3 شماره
صفحات -
تاریخ انتشار 1992