Supersymmetry-induced flavor-changing neutral-current top-quark processes at the CERN Large Hadron Collider

Download
2007-04-01
Cao, J. J.
Eilam, G.
Frank, M.
Hikasa, K.
Liu, G. L.
Turan, İsmail
Yang, J. M.
We systematically calculate various flavor-changing neutral-current top-quark processes induced by supersymmetry at the Large Hadron Collider, which include five decay modes and six production channels. To reveal the characteristics of these processes, we first compare the dependence of the rates for these channels on the relevant supersymmetric parameters, then we scan the whole parameter space to find their maximal rates, including all the direct and indirect current experimental constraints on the scharm-stop flavor mixings. We find that, under all these constraints, only a few channels, through cg -> t at parton level and t -> ch, may be observable at the Large Hadron Collider.
PHYSICAL REVIEW D

Suggestions

A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector
Aad, G.; et. al. (Elsevier BV, 2013-02-26)
We present a search for a light (mass < 2 GeV) boson predicted by Hidden Valley supersymmetric models that decays into a final state consisting of collimated muons or electrons, denoted "lepton-jets". The analysis uses 5 fb(-1) of root s = 7 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with at least four muons; pairs of lepton-jets, each with two or more muons; and pairs of lepton-jets with two or more...
Search for neutral MSSM Higgs bosons decaying to a pair of tau leptons in pp collisions
Khachatryan, V.; et. al. (Springer Science and Business Media LLC, 2014-10-01)
A search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model (MSSM) decaying to tau-lepton pairs in pp collisions is performed, using events recorded by the CMS experiment at the LHC. The dataset corresponds to an integrated luminosity of 24.6 fb−1, with 4.9 fb−1 at 7 TeV and 19.7 fb−1 at 8 TeV. To enhance the sensitivity to neutral MSSM Higgs bosons, the search includes the case where the Higgs boson is produced in association with a b-quark jet. No excess is observed in ...
Search for a light charged Higgs boson in top quark decays in pp collisions at root s=7 TeV
Chatrchyan, S.; et. al. (Springer Science and Business Media LLC, 2012-07-01)
Results are presented on a search for a light charged Higgs boson that can be produced in the decay of the top quark t -> H(+)b and which, in turn, decays into tau(+)nu(tau). The analysed data correspond to an integrated luminosity of about 2 fb(-1) recorded in proton-proton collisions at root s = 7 TeV by the CMS experiment at the LHC. The search is sensitive to the decays of the top quark pairs t (t) over bar -> H(+/-)W(-/+)b (b) over bar and t (t) over bar -> H +/- H -/+ b (b) over bar. Various final sta...
A search for pair production of new light bosons decaying into muons in proton-proton collisions at 13 TeV
Sirunyan, A. M.; et. al. (Elsevier BV, 2019-09-01)
A search for new light bosons decaying into muon pairs is presented using a data sample corresponding to an integrated luminosity of 35.9 fb(-1) of proton-proton collisions at a center-of-mass energy root s = 13 TeV, collected with the CMS detector at the CERN LHC. The search is model independent, only requiring the pair production of a new light boson and its subsequent decay to a pair of muons. No significant deviation from the predicted background is observed. A model independent limit is set on the prod...
Search for heavy long-lived charged particles in pp collisions at root s=7 TeV
Chatrchyan, S.; et. al. (Elsevier BV, 2012-07-01)
The result of a search for heavy long-lived charged particles produced in pp collisions at root s = 7 TeV at the LHC is described. The data sample has been collected using the CMS detector and corresponds to an integrated luminosity of 5.0 fb(-1). The inner tracking detectors are used to define a sample of events containing tracks with high momentum and high ionization energy loss. A second sample of events, which have high-momentum tracks satisfying muon identification requirements in addition to meeting h...
Citation Formats
J. J. Cao et al., “Supersymmetry-induced flavor-changing neutral-current top-quark processes at the CERN Large Hadron Collider,” PHYSICAL REVIEW D, pp. 0–0, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48211.