Little Higgs dark matter after PandaX-II/LUX-2016 and LHC Run-1

Wu, Lei; Yang, Bingfang; Zhang, Mengchao

doi:10.1007/jhep12(2016)152

Cited by 5 publications

(3 citation statements)

References 71 publications

(77 reference statements)

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“…However, vector boson DMs are rather difficult to come across as it requires an extension of the SM gauge group or even more exotic frameworks. Abelian vector boson DM appears in universal extra dimension models with conserved KK parity [21][22][23], in little Higgs framework with T parity [24,25] or in U (1) extensions of SM (for example, see [26,27]). In this paper we have analyzed the phenomenology of a non-abelian vector boson DM, which arises in an extension of SM by SU (2) N gauge group, that has been proposed in [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Non-abelian vector boson dark matter, its unified route and signatures at the LHC

Barman

Bhattacharya

Patra

et al. 2017

J. Cosmol. Astropart. Phys.

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Abstract. Vector boson dark matter (DM) appears in SU (2) N extension (N stands for neutral) of Standard Model (SM) where an additional global U (1) P symmetry is assumed and results in a generalized lepton number defined as: L = P +T 3N . Breaking of U (1) P leads to the breaking of L to (−1) L , thus stabilizing DM through modified R = (−1) 3B+L+2J . This model, already discussed in literature, offers several novel features to elaborate upon. For example, t-channel annihilation and dominant s-channel direct search, along with co-annihilation, helps the DM to evade stringent direct search bounds from LUX and XENON1T after satisfying relic density constraints. On the other hand, the exotic particles of the model can be produced at the Large Hadron Collider (LHC) yielding multilepton final states. Hadronically quiet four lepton signal with large missing energy, in specific, is shown to provide a smoking gun signature of such a framework. We study the details of E(6) → SM ⊗ SU (2) N breaking patterns (through D-parity odd/even cases) which yield important phenomenological consequences.

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Section: Introductionmentioning

confidence: 99%

Non-abelian vector boson dark matter, its unified route and signatures at the LHC

Barman

Bhattacharya

Patra

et al. 2017

J. Cosmol. Astropart. Phys.

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“…particular, the A H gauge boson is the lightest T-odd particle of the LHT spectrum and is electrically neutral, constituting a dark matter candidate [12,[14][15][16]. On the other hand, the Goldstone sector includes the T-even physical Higgs and the would-be Goldstone bosons absorbed by the SM gauge bosons, together with extra T-odd scalars: the would-be Goldstone bosons eaten by the heavy gauge bosons and a physical complex triplet.…”

Section: Jhep11(2022)055mentioning

confidence: 99%

Phenomenological implications of the new Littlest Higgs model with T-parity

Illana

Pérez-Poyatos

2022

J. High Energ. Phys.

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We investigate the parameter space of the new Littlest Higgs model with T-parity (NLHT) recently introduced to cure some pathologies of the original LHT. The model requires extra fermion content and additional pseudo-Goldstone bosons. While the heavy top quark sector is similar, there are both T-odd and T-even heavy quarks and leptons with masses proportional to just two sets of Yukawa matrices in flavor space, one more than in the LHT. The new scalars are a singlet and real triplet, T-odd, with masses controlled by gauge and Yukawa couplings, independent of the spontaneous symmetry breaking scale f, and hence potentially light. Imposing that no mass exceeds the cutoff scale, applying current lower bounds on vector-like quarks and assuming a simplified model with mass degenerate heavy fermions compatible with the heavy photon as dark matter constituent, we find that f gets constrained within the interval between 2 and 3 TeV, the common Yukawa coupling of heavy leptons gets fixed and the Yukawa coupling of heavy quarks becomes greatly correlated to the top quark Yukawa couplings. The particle spectrum is then bounded from below and above, with the (lightest) heavy photon at about 0.5 TeV, not far from the heavy leptons, the new scalars below 1 TeV, the usual complex scalar triplet close to the heavy weak bosons at about 1.5 to 2.5 TeV, and the heavy quarks and top quark partners between 2 and 5 TeV. The new scalars decay predominantly to a standard and a T-odd lepton and have a width comparable to that of the Higgs.

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“…The immediate implication of such parity is that the constraints from electroweak observations can be significantly alleviated by forbidding mixing between heavy and the SM gauge bosons. Furthermore, the T -odd partner of photon is suitable for dark matter candidate [47][48][49][50] whose mass is now bounded below by m h /2 [51][52][53][54][55].…”

Section: Modelmentioning

confidence: 99%

Boosted Higgs-pair production associated with large $E_T^{miss}$: a signal of $Z^\prime$

Chen,

Lin,

et al. 2018

Preprint

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Non-resonant production of Higgs-pair via heavy intermediate states may be a distinctive signature for extended discrete symmetries when accompaied by large missing transvers energy. We discuss T -parity as an example of such symmetry within the Littlest Higgs Model, where a new heavy gauge boson Z , the T -odd partner of SM Z-boson, predominately decays into to a Higgs boson and a dark matter candidate χ. In essence, T -parity stablises simultaneously both the Higgs mass and the dark matter. Production via pp → Z Z → 2h2χ may therefore yield important clues about symmetries connecting the Higgs and dark sectors. This paper makes a case for the search for this channel at the LHC by studying its discovery potential. It is demonstrated that in situations where a large Z − χ mass gap results in a boosted topology, the jet-substructure technique can be leveraged to reach the required significance for discovery in the 2h → 2γ2b decay mode.

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Little Higgs dark matter after PandaX-II/LUX-2016 and LHC Run-1

Cited by 5 publications

References 71 publications

Non-abelian vector boson dark matter, its unified route and signatures at the LHC

Non-abelian vector boson dark matter, its unified route and signatures at the LHC

Phenomenological implications of the new Littlest Higgs model with T-parity

Boosted Higgs-pair production associated with large $E_T^{miss}$: a signal of $Z^\prime$

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