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1. chinaXiv:201711.02265 [pdf]

Top quark modelling and generators in CMS

Efe Yazgan
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Recent top quark event modelling studies done using CMS proton-proton data collected at a centre of mass energies of 8 and 13 TeV and state-of-the-art theoretical predictions accurate to next-toleading order QCD interfaced with PYTHIA8 and HERWIG++ event generators are summarised. The particle-level top quark (pseudo-top), underlying event measurement in tt events and parton shower tuning using tt events are discussed.

submitted time 2017-11-10 Hits387Downloads211 Comment 0

2. chinaXiv:201612.00441 [pdf]

Current experimental constraints on the lightest Higgs boson mass in the constrained MSSM

Cao,J; Heng,Z; Li,D; Yang,JM

We examine the parameter space of the constrained MSSM by considering various experimental constraints. For the dark matter sector, we require the neutralino dark matter to account for the relic density measured by the WMAP and satisfy the XENON limits on

submitted time 2016-12-28 Hits925Downloads509 Comment 0

3. chinaXiv:201612.00423 [pdf]

Dark matter in the little Higgs model under current experimental constraints from the LHC, Planck, and Xenon data

Wang,L; Yang,JM; Zhu,J

We examine the status of dark matter (heavy photon) in the littlest Higgs model with T parity (LHT) in light of the new results from the LHC Higgs search, the Planck dark matter relic density, and the XENON100 limit on the dark matter scattering off the n

submitted time 2016-12-28 Hits1367Downloads769 Comment 0

4. chinaXiv:201612.00412 [pdf]

New approach for detecting a compressed bino/wino at the LHC

Han,C; Wu,L; Yang,JM; Zhang,M; Zhang,Y

In some supersymmetric models like split supersymmetry or models with non-universal gaugino mass, bino (LSP) and winos (NLSP) may have rather small mass splitting in order to provide the correct dark matter relic density through bino/wino co-annihilation. Such a scenario with the compressed bino/wino is difficult to explore at the LHC. In this work we propose to probe this scenario from pp → jχ ?02χ ?±1 followed by χ ?02 → γχ ?01 and χ ?±1 → W?χ ?01 → l±νχ ?01 (this method is also applicable to the compressed bino/higgsino scenario). Through a detailed Monte Carlo simulation for both the signal and the backgrounds, we find that for a mass splitting ?M ? 5 ? 15 GeV between bino (LSP) and wino (NLSP), the 14 TeV LHC with luminosity of 500fb?1 can probe the wino up to 150 GeV (the sensitivity can reach 5σ for ?M = 5 GeV and 2σ for ?M = 15 GeV). We also investigate the dark matter detection sensitivities for this scenario and find that the planned XENON-1T(2017) cannot fully cover the parameter space with wino below 150 GeV allowed by relic density and the LUX limits.

submitted time 2016-12-28 Hits1510Downloads839 Comment 0

5. chinaXiv:201612.00399 [pdf]

Explanation of the ATLAS Z-peaked excess by squark pair production in the NMSSM

Cao,J; Shang,L; Yang,JM; Zhang,Y

The ATLAS collaboration recently reported a 3σ excess in the leptonic-Z + jets + EmissTTmiss_{T}^{miss} channel. We intend to interpret this excess by squark pair production in the Next-to-Minimal Supersymmetric Standard Model (NMSSM). The decay chain we

submitted time 2016-12-28 Hits913Downloads478 Comment 0

6. chinaXiv:201612.00394 [pdf]

Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar–Wise model

Cao,J; Han,C; Shang,L; Su,W; Yang,JM; Zhang,Y

The evidence of a new scalar particle X from the 750 GeV diphoton excess, and the absence of any other signal of new physics at the LHC so far suggest the existence of new colored scalars, which may be moderately light and thus can induce sizable Xgg and

submitted time 2016-12-28 Hits865Downloads456 Comment 0

7. chinaXiv:201612.00382 [pdf]

Supersymmetric QCD corrections to single top quark production at the Fermilab Tevatron

Li,C; Oakes,RJ; Yang,J; Zhou,H

We evaluate the supersymmetric QCD corrections to single top quark production via qq?′→tb?qq?′→tb?q \bar q'\to t \bar b at the Fermilab Tevatron in the minimal supersymmetric model. We find that within the allowed range of squark and gluino masses the sup

submitted time 2016-12-28 Hits1467Downloads829 Comment 0

8. chinaXiv:201612.00380 [pdf]

Probing top quark decay into light stop in the supersymmetric standard model at the upgraded Tevatron

Hosch,M; Oakes,R; Whisnant,K; Yang,JM; Young,B; Zhang,X

We investigate the possibility of observing the exotic decay mode of the top quark into the lightest stop (t~1t~1\tilde t_1) and neutralino (χ~01χ~10\tilde\chi^0_1) in the minimal supersymmetric standard model with R-parity at the upgraded Tevatron. First

submitted time 2016-12-28 Hits1460Downloads828 Comment 0

9. chinaXiv:201612.00374 [pdf]

Probing R violating top quark decays at the NLC

Abraham,K; Whisnant,K; Yang,J; Young,B

We examine the possibility of observing exotic top quark decays via RRR-Parity violating SUSY interactions in e+e?e+e?e^+e^- collisions at \sqrt{s = 500 GeV\sqrt{s = 500 GeV\sqrt{s = 500 GeV. We present cross-sections for tt?tt?t\bar t production followed

submitted time 2016-12-28 Hits893Downloads522 Comment 0

10. chinaXiv:201612.00370 [pdf]

Probing R-parity Violating Interactions from Top Quark Polarization at LHC

Li,P; Lu,G; Yang,JM; Zhang,H

In minimal supersymmetric standard model the R-parity violating interactions can induce anomalous top pair productions at the LHC through the t-channel process d_R \bar d_R -> t_L \bar t_L by exchanging a slepton or u-channel process d_R \bar d_R -> t_R \

submitted time 2016-12-28 Hits1229Downloads631 Comment 0

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