COLORED SCALAR PARTICLES PRODUCTION IN pp-COLLISIONS AND POSSIBLE MASS LIMITS FOR SCALAR GLUONS FROM FUTURE LHC DATA

Martynov, M. V.; Smirnov, A. D.

doi:10.1142/s0217732308028375

Cited by 14 publications

(10 citation statements)

References 10 publications

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“…This leads to the interesting possibility of searching for events with same sign top quarks [28], which is reasonably easy to distinguish from SM backgrounds. Studies relevant to the LHC have been carried out [42][43][44][45][46][47][48], and assuming a model where sgluons decay mostly to tops, LHC searches rule out sgluon masses up to the region of 700 GeV. Since, in most of the parameter space of motivated models, sgluons do not lead to the dominant discovery and exclusion potential we do not consider them further in our present collider simulations.…”

Section: Discovery and Exclusion Reachmentioning

confidence: 99%

Dirac vs Majorana gauginos at a 100 TeV collider

Cortona

Hardy

Powell³

2016

J. High Energ. Phys.

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Abstract:We compare the prospects for observing theories with Majorana or Dirac gauginos at a future 100 TeV proton-proton collider. Calculating the expected discovery and exclusion regions, we find that for heavy gluino masses the squark discovery reach is significantly reduced in Dirac gluino models relative to the Majorana case. However, if the squark and gluino masses are close the reach is similar in both scenarios. We also consider the electroweak fine tuning of theories observable at such a collider, and the impact of existing constraints from flavour and CP violating observables. Models with Majorana gluinos that are fine tuned to less than one part in 10, 000 can typically be discovered or excluded, and Dirac models with tuning of one part in 1, 000 can be probed. The flavour structure of Majorana models is highly constrained if they have observable squarks, while O(1) violation is possible in accessible Dirac models. In both cases new sources of CP violation must be very suppressed. Future collider searches can also give important information on possible dark matter candidates. We study the relation of this to indirect and direct detection searches, and find that if dark matter is a neutralino, a 100 TeV collider could probe the viable dark matter candidates in large classes of both Dirac and Majorana models.

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Section: Discovery and Exclusion Reachmentioning

confidence: 99%

Dirac vs Majorana gauginos at a 100 TeV collider

Cortona

Hardy

Powell³

2016

J. High Energ. Phys.

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“…Since scalar octets are color objects, they may be produced in pp collisions. The phenomenology of such particles at LHC is being hotly debated at the present time in the literature [74][75][76][77][78][79][80][81][82][83][84][85].…”

Section: Content Of the Scalar Sector In The Model Involving Chiral Cmentioning

confidence: 99%

Chiral color quark symmetry and possible constraints on the G′-boson mass from tevatron and LHC data

Martynov

Smirnov

2012

Phys. Atom. Nuclei

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“…As seen from the expressions (5), (6) the coupling constants of the interaction of the scalar gluon F 2 with u-and d-quarks are of order of m u /η ∼ m d /η ∼ 10 −5 and the interactions of these quarks as the initial partons with the scalar gluon F 2 are negligibly small. On the other hand the Lagrangian (8), (9) can induce through the loop contribution of t-quark the more significant effective interaction of two initial gluons with the scalar gluon F 2 , which should be taken into account. The analogous effective two gluon interaction is induced also with the colorless scalar Φ ′ 2 .…”

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confidence: 99%

“…It should be noted that the coupling constants of the doublets (2) with t-quark are known (up to the mixing parameters), which gives the possibility to estimate quantitatively the possible effects from these particles in dependence on their masses. The pair production of the scalar octets in pp-collisions at the LHC has been discussed in Refs [4][5][6][7][8][9][10][11][12][13][14][15][16].…”

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confidence: 99%

Resonance contribution of scalar color octet to tt̄ production at the LHC in the minimal four-color quark–lepton symmetry model

2016

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The scalar color octet contribution to the resonance tt-pair production at the LHC is calculated and analysed with account of the one loop effective two gluon vertex. It is shown that this contribution from the scalar color octet F 2 predicted by the minimal model with the four color quark-lepton symmetry is for √ s = 13 TeV of about a few percents for 750 < m F 2 < 1800 GeV and can exceed 10% for 400 < m F 2 < 750 GeV. It is also pointed out that the search for the scalar octet F 2 as the resonance in the dijet mass spectra seems to be difficult because of the smallness of its one loop effective two gluon interaction.Keywords: Beyond the SM; four color symmetry; scalar octet; scalar gluon; top quark physics. PACS number: 12.60.-iThe search for new physics effects beyond the Standard Model (SM) is now one of the goals of the experiments at the LHC. There are many models predicting new physics effects. The most interesting of them look the models predicting new effects due to enlarging the symmetry of the SM because the search for such effects could help us to find the next symmetry in yet unknown hierarchy of the symmetries which possibly unify the known in the SM electroweak and strong interactions of quarks and leptons.One of such variant of new physics beyond the SM can be induced by the possible four color symmetry between quarks and leptons of Pati-Salam type [1]. The four color quark-lepton symmetry can be unified with the electroweak SU L (2)×U(1) symmetry of the SM in the minimal way by the groupwhere the first factor is the vector-like group of the four color quark-lepton symmetry the second one is the usual SM electroweak symmetry group for the left-handed fermions *

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COLORED SCALAR PARTICLES PRODUCTION IN pp-COLLISIONS AND POSSIBLE MASS LIMITS FOR SCALAR GLUONS FROM FUTURE LHC DATA

Cited by 14 publications

References 10 publications

Dirac vs Majorana gauginos at a 100 TeV collider

Dirac vs Majorana gauginos at a 100 TeV collider

Chiral color quark symmetry and possible constraints on the G′-boson mass from tevatron and LHC data

Resonance contribution of scalar color octet to tt̄ production at the LHC in the minimal four-color quark–lepton symmetry model

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