Same-sign top pair plus W production in flavor changing vector and scalar models
نویسندگان
چکیده
منابع مشابه
Like Sign Top Pair Production at Lhc
Having a mass comparable to the weak scale, the top quark may have a sizable flavor changing couplings to Higgs bosons. We show that such couplings can be probed at the LHC through the parton subprocess c(¯ c)g → t(¯ t)A 0 , where the pseudoscalar A 0 subsequently decays into t¯ c or ¯ tc, giving rise to the intriguing final state of like sign top quark pairs. We also discuss major backgrounds ...
متن کاملFlavor-changing scalar interactions.
The smallness of fermion masses and mixing angles has recently been been attributed to approximate global U(1) symmetries, one for each fermion type. The parameters associated with these symmetry breakings are estimated here directly from observed masses and mixing angles. It turns out that although flavor changing reaction rates may be acceptably small in electroweak theories with several scal...
متن کاملLike Sign Top Quark Pair Production at Linear Colliders
In the general two Higgs doublet model with flavor changing neutral Higgs couplings, neutral Higgs bosons may decay dominantly via tc̄ or t̄c final states. At the linear collider, e+e− → h0A0 or H0A0 production processes may result in bb̄tc̄, W+W−tc̄ or ttc̄c̄ (or t̄t̄cc) final states. The process γγ → h0, A0 → tc̄ is also promising, but e+e− → (h0, H0)Z0 → tc̄Z0 is relatively suppressed. The possibility ...
متن کاملSearch for top-quark production via flavor-changing neutral currents in W+1 jet events at CDF.
We report on a search for the non-standard-model process u(c) + g --> t using pp[over ] collision data collected by the Collider Detector at Fermilab II detector corresponding to 2.2 fb;{-1}. The candidate events are classified as signal-like or backgroundlike by an artificial neural network. The observed discriminant distribution yields no evidence for flavor-changing neutral current top-quark...
متن کاملProbing flavor-changing top-charm-scalar interactions in e+e- collisions.
Due to the very large mass of the top-quark, probing the flavor changing top-charm-scalar vertex is clearly very important. Fortunately the largeness of mt endows a unique signature to the resulting reaction i.e., e+ea t~(fc) that should be helpfuL in identification of such events. A two Higgs doublet model, without natural flavor conservation, is used to give an illustrative estimate for the r...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2018
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.98.075012