Confronting spin-3/2 and other new fermions with the muon g-2 measurement

Criado, Juan Carlos; Djouadi, Abdelhak; Koivunen, Niko; Müürsepp, Kristjan; Raidal, M.; Veermäe, Hardi

doi:10.1016/j.physletb.2021.136491

Cited by 10 publications

(5 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We describe the system of photons, pions, nucleons and ∆-baryons at low energies through a Lorentz-invariant EFT in which the ∆ is a field in the (3/2, 0)⊕(0, 3/2) representation of the Lorentz group, using the multi-spinor formalism introduced in Refs. [74][75][76]. From here on, we will refer to this description of a spin-3/2 field as the multi-spinor framework (MSF).…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…On the other hand, the effective field theory (EFT) re-formulation of Weinberg's original idea using multispinor representations [74] has turned out to be simple and practical, providing a consistent description of generic massive higher-spin particle interactions below some cut-off scale Λ. This EFT has successfully been used to study generic higher-spin dark matter [74], production and decays of higher-spin particles at colliders [75] and higher-spin induced contributions to the anomalous lepton moments [76].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An effective field theory of the Delta-resonance

Criado,

Djouadi,

Koivunen

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

We present an effective field theory of the ∆-resonance as an interacting Weinberg's (3/2, 0) ⊕ (0, 3/2) field in the multi-spinor formalism. We derive its interactions with nucleons N , pions π and photons γ, and compute the ∆-resonance cross-sections in pion-nucleon scattering and pion photo-production. The theory contains only the physical spin-3/2 degrees of freedom. Thus, it is intrinsically consistent at the Hamiltonian level and, unlike the commonly used Rarita-Schwinger framework, does not require any additional ad hoc manipulation of couplings or propagators. The symmetries of hadronic physics select a unique operator for each coupling N π∆ and γπ∆. The proposed framework can be extended to also describe other higher-spin hadronic resonances.

show abstract

Section: Theoretical Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An effective field theory of the Delta-resonance

Criado,

Djouadi,

Koivunen

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…where ∆a µ ≡ a exp µ − a SM µ . This result leaves a room for new particles which can contribute to muon g − 2 through direct coupling to the muon [4][5][6][7][8][9]. In search for this new physics our approach relies on supersymmetry (SUSY) which is motivated, as is well known, by a number of considerations.…”

Section: Introductionmentioning

confidence: 99%

Sparticle Spectroscopy at LHC-Run3 and LSP Dark Matter in light of Muon g-2

Shafi,

2021

Preprint

View full text Add to dashboard Cite

Inspired by the latest measurement of muon g-2 by the Fermilab Experiment, we revisit a class of supersymmetric models in which non-universality at M GUT allows us to realize relatively light sleptons in the few hundred GeV range. These sleptons provide additional contributions to muon g-2 that can be arranged to reconcile theory and experiment. The solutions compatible with the muon g − 2 resolution typically predict light sleptons, charginos and neutralinos. We show how these solutions can be probed during LHC-Run3. A direct impact on the chargino mass is observed such that the chargino can be probed up to about 800 GeV during the Run3 experiments. Despite such a direct impact, it is still possible to realize lighter chargino masses which can escape detection due to the chirality mixture of the lighter slepton states. The colored squarks as well as the gluino turn out to be heavier than about 3-4 TeV if the LSP neutralino satisfies the Planck bound on the dark matter relic abundance. We highlight a variety of benchmark points and, in particular, coannihilation scenarios with dark matter candidates that will be tested in the ongoing and planned direct and indirect detection experiments. By relaxing the requirement that the LSP neutralino saturates the relic dark matter abundance, we are able to find solutions with gluino and squark masses in a range that may be accessible at LHC-Run3.

show abstract

“…Recent measurement at the Fermilab has drawn some interests to our community[74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89].…”

mentioning

confidence: 99%

Magnetic moments of leptons, charged lepton flavor violations and dark matter phenomenology of a minimal radiative Dirac neutrino mass model

Das

Mitra

et al. 2022

J. High Energ. Phys.

View full text Add to dashboard Cite

In a simple extension of the standard model (SM), a pair of vector like lepton doublets (L1 and L2) and a SU(2)L scalar doublet (η) have been introduced to help in accommodating the discrepancy in determination of the anomalous magnetic moments of the light leptons, namely, e and μ. Moreover, to make our scenario friendly to a Dirac like neutrino and also for a consistent dark matter phenomenology, we specifically add a singlet scalar (S) and a singlet fermion (ψ) in the set-up. However, the singlet states also induce a meaningful contribution in other charged lepton processes. A discrete symmetry $$ {\mathcal{Z}}_2\times {\mathcal{Z}}_2^{\prime } $$ Z 2 × Z 2 ′ has been imposed under which all the SM particles are even while the new particles may be assumed to have odd charges. In a bottom-up approach, with a minimal particle content, we systematically explore the available parameter space in terms of couplings and masses of the new particles. Here a number of observables associated with the SM leptons have been considered, e.g., masses and mixings of neutrinos, (g − 2) anomalies of e, μ, charged lepton flavor violating (cLFV) observables and the dark matter (DM) phenomenology of a singlet-doublet dark matter. Neutrinos, promoted as the Dirac type states, acquire mass at one loop level after the discrete $$ {\mathcal{Z}}_2^{\prime } $$ Z 2 ′ symmetry gets softly broken, while the unbroken $$ {\mathcal{Z}}_2 $$ Z 2 keeps the dark matter stable. The mixing between the singlet ψ and the doublet vector lepton can be constrained to satisfy the electroweak precision observables and the spin independent (SI) direct detection (DD) cross section of the dark matter. In this analysis, potentially important LHC bounds have also been discussed.

show abstract

Confronting spin-3/2 and other new fermions with the muon g-2 measurement

Cited by 10 publications

References 51 publications

An effective field theory of the Delta-resonance

An effective field theory of the Delta-resonance

Sparticle Spectroscopy at LHC-Run3 and LSP Dark Matter in light of Muon g-2

Magnetic moments of leptons, charged lepton flavor violations and dark matter phenomenology of a minimal radiative Dirac neutrino mass model

Contact Info

Product

Resources

About