Scalar dark matter with CERN-LEP data and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>Z</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math>search at the LHC in an<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>U</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1</mml:mn><mml:msup><mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>model

Martı́nez, R.; Nisperuza, Jorge; Ochoa, F.; Rubio, Juan

doi:10.1103/physrevd.90.095004

Cited by 25 publications

(24 citation statements)

References 48 publications

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“…We consider three right-handed neutrinos, one for each family, as predicted by an anomaly free and flavour universal Abelian extension. See [12][13][14][15] for some non-universal examples.…”

Section: Jhep07(2016)086mentioning

confidence: 99%

Z ′, Higgses and heavy neutrinos in U(1)′ models: from the LHC to the GUT scale

Accomando

Corianò

Rose

et al. 2016

J. High Energ. Phys.

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We study a class of non-exotic minimal U(1) extensions of the Standard Model, which includes all scenarios that are anomaly-free with the ordinary fermion content augmented by one Right-Handed neutrino per generation, wherein the new Abelian gauge group is spontaneously broken by the non-zero Vacuum Expectation Value of an additional Higgs singlet field, in turn providing mass to a Z state. By adopting the B − L example, whose results can be recast into those pertaining to the whole aforementioned class, and allowing for both scalar and gauge mixing, we first extract the surviving parameter space in presence of up-to-date theoretical and experimental constraints. Over the corresponding parameter configurations, we then delineate the high energy behaviour of such constructs in terms of their stability and perturbativity. Finally, we highlight key production and decay channels of the new states entering the spectra of this class of models, i.e., heavy neutrinos, a second Higgs state and the Z , which are amenable to experimental investigation at the Large Hadron Collider. We therefore set the stage to establish a direct link between measurements obtainable at the Electro-Weak scale and the dynamics of the underlying model up to those where a Grand Unification Theory embedding a U(1) can be realised.

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Section: Jhep07(2016)086mentioning

confidence: 99%

Z ′, Higgses and heavy neutrinos in U(1)′ models: from the LHC to the GUT scale

Accomando

Corianò

Rose

et al. 2016

J. High Energ. Phys.

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show abstract

“…The models are only self-consistent if there exist exactly three generations of fermions as a result of the triangle gauge anomalies and QCD asymptotic freedom [229,414,433]. Moreover, they can host a dark matter candidate [230,423,[429][430][431][434][435][436][437][438][439][440][441][442][443][444][445], generate neutrino masses [295-299, 446, 447], among other things [448][449][450][451][452][453][454][455][456].…”

mentioning

confidence: 99%

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

2018

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We review how the muon anomalous magnetic moment (g − 2) and the quest for lepton flavor violation are intimately correlated. Indeed the decay µ → eγ is induced by the same amplitude for different choices of in-and outgoing leptons. In this work, we try to address some intriguing questions such as:Which hierarchy in the charged lepton sector one should have in order to reconcile possible signals coming simultaneously from g − 2 and lepton flavor violation?What can we learn if the g − 2 anomaly is confirmed by the upcoming flagship experiments at FERMILAB and J-PARC, and no signal is seen in the decay µ → eγ in the foreseeable future? On the other hand, if the µ → eγ decay is seen in the upcoming years, do we need to necessarily observe a signal also in g − 2?.In this attempt, we generally study the correlation between these observables in a detailed analysis of simplified models. We derive master integrals and

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“…Section 2 is devoted to describe the theoretical model. Since this model has been discussed in previous works [67][68][69], we just describe some general properties and show the basic couplings. In section 3, based on the fundamental couplings at the quark level, we will obtain the nuclear SI and SD effective couplings and cross sections at zero momentum transfer.…”

Section: Jhep05(2016)113mentioning

confidence: 99%

“…For that, we perform our analysis in the framework of an U(1) abelian extension of the SM, which includes an extra neutral Z gauge boson; specifically, the nonuniversal family extension introduced in refs. [67][68][69] give us a natural background which provide elements to derive new results. In addition to a Z gauge boson, the extra U(1) symmetry is nonuniversal in the quark sector, which implies the necessity of at least two scalar doublets in order to generate all the Yukawa couplings and obtain a complete massive spectrum in the quark sector.…”

Section: Jhep05(2016)113mentioning

confidence: 99%

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Spin-independent interferences and spin-dependent interactions with scalar dark matter

Martı́nez

Ochoa

2016

J. High Energ. Phys.

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We explore mechanisms of interferences under which the spin-independent interaction in the scattering of scalar dark matter with nucleus is suppressed in relation to the spin-dependent one. We offer a detailed derivation of the nuclear amplitudes based on the interactions with quarks in the framework of a nonuniversal U(1) extension of the standard model. By assuming a range of parameters compatible with collider searches, electroweak observables and dark matter abundance, we find scenarios for destructive interferences with and without isospin symmetry. The model reveals solutions with mutually interfering scalar particles, canceling the effective spin-independent coupling with only scalar interactions, which requires an extra Higgs boson with mass M H > 125 GeV. The model also possesses scenarios with only vector interactions through two neutral gauge bosons, Z and Z , which do not exhibit interference effects. Due to the nonuniversality of the U(1) symmetry, we distinguish two family structures of the quark sector with different numerical predictions. In one case, we obtain cross sections that pass all the Xenon-based detector experiments. In the other case, limits from LUX experiment enclose an exclusion region for dark matter between 9 and 800 GeV. We examine a third scenario with isospin-violating couplings where interferences between scalar and vector boson exchanges cancel the scattering. We provide solutions where interactions with Xenon-based detectors is suppressed for light dark matter, below 6 GeV, while interactions with Germanium-and Silicon-based detectors exhibit solutions up to the regions of interest for positive signals reported by CoGeNT and CDMS-Si experiments, and compatible with the observed DM relic density for DM mass in the range 8.3-10 GeV. Spin-dependent interactions become the dominant source of scattering around the interference regions, where Maxwellian speed distribution is considered.

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Scalar dark matter with CERN-LEP data andZ′search at the LHC in anU(1)′model

Cited by 25 publications

References 48 publications

Z ′, Higgses and heavy neutrinos in U(1)′ models: from the LHC to the GUT scale

Z ′, Higgses and heavy neutrinos in U(1)′ models: from the LHC to the GUT scale

A call for new physics: The muon anomalous magnetic moment and lepton flavor violation

Spin-independent interferences and spin-dependent interactions with scalar dark matter

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