Bileptons: present limits and future prospects

Cuypers, Frank; Davidson, Sacha

doi:10.1007/s100520050157

Cited by 98 publications

(118 citation statements)

References 54 publications

(111 reference statements)

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“…1, 2 or 3, indicates the SU(2) L representation, singlet, doublet or triplet, respectively. The terms in the Lagrangians are obtained by expanding the most general SM gauge invariant Lagrangian in terms of explicit leptonic fields [25].…”

Section: General Lagrangian For Charged Lepton Flavor Violationmentioning

confidence: 99%

Sensitivity of future lepton colliders to the search for charged lepton flavor violation

Schmidt

2019

Phys. Rev. D

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The observation of lepton flavor violation indicates new physics beyond the Standard Model. Lepton colliders are ideal facilities to probe charged lepton flavor violation (CLFV) signals induced by new physics at high energy. In this work we perform a comprehensive study of the sensitivity of future lepton colliders to charged lepton flavor violation. We consider the most general renormalizable Lagrangian coupling two leptons to new bosonic particles, involving both ∆L = 0 and ∆L = 2 interactions. The CLFV processes are introduced by the exchange of off-shell new particles at tree-level. We find that CEPC, ILC, FCC-ee, and CLIC each provide a complementary probe of CLFV couplings to low-energy precision experiments for τ lepton(s) in final states, while low-energy precision experiments are more sensitive in the absence of τ leptons. *

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Section: General Lagrangian For Charged Lepton Flavor Violationmentioning

confidence: 99%

Sensitivity of future lepton colliders to the search for charged lepton flavor violation

Schmidt

2019

Phys. Rev. D

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“…Extensions with vector-like leptons in nontrivial SU(2) L representations are also possible [432]. Unsurprisingly, the phenomenology [423,425,[433][434][435] and direct search constraints [433,434] for L-violating, doubly charged vector bosons are similar to L-violating, doubly charged scalar bosons, which we now discuss.…”

Section: Type II Seesaw Modelsmentioning

confidence: 91%

“…The Type II mechanism can be embedded in a number of extended gauge scenarios, for example the LRSM as discussed in Sec. 3.1.4, as well as GUTs, such as (331) theories [423][424][425][426] and the extensions of minimal SU(5) [427]. For (331) models, one finds the presence of bileptons [428,429], i.e., gauge bosons with L = ±2 charges and hence Q = ±2 electric charges.…”

Section: Type II Seesaw Modelsmentioning

confidence: 99%

Lepton Number Violation: Seesaw Models and Their Collider Tests

et al. 2018

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The Majorana nature of neutrinos is strongly motivated from the theoretical and phenomenological point of view. A plethora of neutrino mass models, known collectively as Seesaw models, exist that could generate both a viable neutrino mass spectrum and mixing pattern. They can also lead to rich, new phenomenology, including lepton number non-conservation as well as new particles, that may be observable at collider experiments. It is therefore vital to search for such new phenomena and the mass scale associated with neutrino mass generation at high energy colliders. In this review, we consider a number of representative Seesaw scenarios as phenomenological benchmarks, including the characteristic Type I, II, and III Seesaw mechanisms, their extensions and hybridizations, as well as radiative constructions. We present new and updated predictions for analyses featuring lepton number violation and expected coverage in the theory parameter space at current and future colliders. We emphasize new production and decay channels, their phenomenological relevance and treatment across different facilities in e + e − , e − p, and pp collisions, as well as the available Monte Carlo tools available for studying Seesaw partners in collider environments.

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“…If, in the respective processes, the square of the momentum transfer is substantially lower than the squared mass of the exchanged particle, then the interactions induced by the exchange of these new states can be described in terms of a four-fermion contact interaction (CI). Here, we mean effects associated, for example, with the composite structure of fermions [1,2] and with the exchange of heavy Z and W bosons [3,4], scalar and vector leptoquarks LQ [5][6][7], supersymmetric leptons and quarks in supersymmetric theories featuring R-parity violation [8,9], scalar or vector bileptons [10], and vector boson and graviton Kaluza-Klein (KK) states in models involving extra spatial dimensions [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Thus, contact interactions provide a universal parametrization of deviations from the Standard Model behavior that are induced by various types of new physics in the behavior of observables and are quite efficient in searches for these new effects, irrespective of the source that causes them.…”

Section: Introductionmentioning

confidence: 99%

Searches for and identification of effects of extra spatial dimensions in dilepton and diphoton production at the Large Hadron Collider

et al. 2015

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Prospects of discovering and identifying effects of extra spatial dimensions in dilepton and diphoton production at the Large Hadron Collider (LHC) are studied. Such effects may be revealed by the characteristic behavior of the invariant-mass distributions of dileptons and diphotons, and their identification can be performed on the basis of an analysis of their angular distributions. The discovery and identification reaches are estimated for the scale parameter M S of the Kaluza-Klein gravitational towers, which can be determined in experiments devoted to measuring the dilepton and diphoton channels at the LHC.

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Bileptons: present limits and future prospects

Cited by 98 publications

References 54 publications

Sensitivity of future lepton colliders to the search for charged lepton flavor violation

Sensitivity of future lepton colliders to the search for charged lepton flavor violation

Lepton Number Violation: Seesaw Models and Their Collider Tests

Searches for and identification of effects of extra spatial dimensions in dilepton and diphoton production at the Large Hadron Collider

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