Anapole dark matter at the LHC

Gao, Y.; Ho, Chiu Man; Scherrer, Robert J.

doi:10.1103/physrevd.89.045006

Cited by 82 publications

(99 citation statements)

References 31 publications

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“…In this study we use the ABMP15NNLO proton PDFs of [57]. For comparison we also show the results obtained with CT10NLO proton PDFs [58] with phenomenological nuclear corrections of [4]. TeV, as a function of (pseudo)rapidity.…”

Section: Production Of W ± and Z Bosons In P+pb Collisions At Lhcmentioning

confidence: 99%

Nuclear parton distributions

Kulagin

2017

EPJ Web Conf.

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Abstract. We review a microscopic model of the nuclear parton distribution functions, which accounts for a number of nuclear effects including Fermi motion and nuclear binding, nuclear meson-exchange currents, off-shell corrections to bound nucleon distributions and nuclear shadowing. We also discuss applications of this model to a number of processes including lepton-nucleus deep inelastic scattering, proton-nucleus Drell-Yan lepton pair production at Fermilab, as well as W ± and Z 0 boson production in proton-lead collisions at the LHC.

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Section: Production Of W ± and Z Bosons In P+pb Collisions At Lhcmentioning

confidence: 99%

Nuclear parton distributions

Kulagin

2017

EPJ Web Conf.

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“…The role of interference effects is a bit less pronounced at 7/8 TeV compared to 13 TeV. We make use of CT10nnlo [86] as PDF set for the gluon luminosities. Since our calculations are purely performed at LO, the renormalization scale dependence enters through the strong coupling α s only, which we take from the employed PDF set.…”

Section: Parameter Choice and Selection Cutsmentioning

confidence: 99%

Interference contributions to gluon initiated heavy Higgs production in the two-Higgs-doublet model

2016

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We discuss the production of a heavy neutral Higgs boson of a CP-conserving two-Higgs-doublet model in gluon fusion and its decay into a four-fermion final state, gg(→ V V ) → e + e − μ + μ − /e + e − ν lνl . We investigate the interference contributions to invariant mass distributions of the four-fermion final state and other relevant kinematical observables. The relative importance of the different contributions is quantified for the process in the on-shell approximation, gg → Z Z. We show that interferences of the heavy Higgs with the light Higgs boson and background contributions are essential for a correct description of the differential cross section. Even though they contribute below O(10 %) to those heavy Higgs signal cross sections, to which the experiments at the Large Hadron Collider were sensitive in its first run, we find that they are sizable in certain regions of the parameter space that are relevant for future heavy Higgs boson searches. In fact, the interference contributions can significantly enhance the experimental sensitivity to the heavy Higgs boson.

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“…In fact, it is known that spin-1/2 particles can interact with a photon also through an anapole coupling [40]. But this coupling vanishes identically when the photon is on shell.…”

Section: Jhep09(2014)006mentioning

confidence: 99%

3.5 keV X-ray line from nearly-degenerate WIMP dark matter decays

Chiang

Yamada²

2014

J. High Energ. Phys.

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The unidentified emission line at the energy of ∼3.5 keV observed in X-rays from galaxy clusters may originate from a process involving a dark matter particle. On the other hand, a weakly interacting massive particle (WIMP) has been an attractive dark matter candidate, due to its well-understood thermal production mechanism and its connection to physics at the TeV scale. In this paper, we pursue the possibility that the 3.5 keV X-ray arises from a late time decay of a WIMP dark matter into another WIMP dark matter, both of which have the mass of O(100) GeV and whose mass splitting is about 3.5 keV. We focus on the simplest case where there are two Majorana dark matter particles and two charged scalars that couple with a standard model matter particle. By assuming a hierarchical structure in the couplings of the two dark matter particles and two charged scalars, it is possible to explain the 3.5 keV line and realize the WIMP dark matter scenario at the same time. Since the effective coupling of the two different Majorana dark matter particles and one photon violates CP symmetry, the model always contains a new source of CP violation, so the model's connection to the physics of electric dipole moments is discussed. The model's peculiar signatures at the LHC are also studied. We show the prospect of detecting the charged scalars through a detailed collider simulation.

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Anapole dark matter at the LHC

Cited by 82 publications

References 31 publications

Nuclear parton distributions

Nuclear parton distributions

Interference contributions to gluon initiated heavy Higgs production in the two-Higgs-doublet model

3.5 keV X-ray line from nearly-degenerate WIMP dark matter decays

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