Left–right symmetry and heavy particle quantum effects

Czakon, M.; Gluza, J.; Zrałek, M.

doi:10.1016/s0550-3213(99)00717-8

Cited by 36 publications

(48 citation statements)

References 49 publications

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“…However, it does not mean that it is easier to confirm or falsify it, in fact, despite of many interesting studies and constraints, the model has not been ruled out so far (though many interesting questions and problems calling for consistency of the model have been arose [1][2][3]. PDG [21] gives M W 2 > 1 TeV for standard couplings decaying to eν, recently the CMS collaboration established the generic bound [22] [25] based on the integrated luminosity of 2.1 f b −1 pushed it even further, for some neutrino mass ranges it reaches already 2.3 TeV.…”

Section: Jhep07(2012)038mentioning

confidence: 99%

“…Apart from [1][2][3]18] in which one of the authors of this paper has been involved (MLRSM model), there are other papers: [35] (limits on W 2 mass coming from the K L −K S process (finite box diagrams, renormalization not required), [36,37] (LEP physics), [38][39][40][41][42] (process b → sγ). Some interesting results are included also in papers [43,44] where the problem of decoupling of heavy scalar particles in low energy processes has been discussed.…”

Section: Jhep07(2012)038mentioning

confidence: 99%

“…see figure 5 in [2]. Mass of the lightest neutral Higgs scalar is assumed to be M H 0 0 = 120 GeV (∆r is not sensitive to this mass, see figure 6 in [2]).…”

Section: Jhep07(2012)038mentioning

confidence: 99%

“…It is not a common strategy, especially as Grand Unified Theories (GUT) are concerned. Here we calculate 1-loop radiative corrections at low energies consistently in the framework of the non-standard model (not only in its SM subset, this issue of consistency has been explored intensively in [1][2][3], see also [4][5][6]). In the next step we are looking into some specific non-standard process at LHC, taking into account obtained earlier precise low energy predictions for parameters of the model.…”

Section: Introductionmentioning

confidence: 99%

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Left-right symmetry at LHC and precise 1-loop low energy data

Chakrabortty

Gluza

Sevillano

et al. 2012

J. High Energ. Phys.

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Despite many tests, even the Minimal Manifest Left-Right Symmetric Model (MLRSM) has never been ultimately confirmed or falsified. LHC gives a new possibility to test directly the most conservative version of left-right symmetric models at so far not reachable energy scales. If we take into account precise limits on the model which come from low energy processes, like the muon decay, possible LHC signals are strongly limited through the correlations of parameters among heavy neutrinos, heavy gauge bosons and heavy Higgs particles. To illustrate the situation in the context of LHC, we consider the "golden" process pp → e + N . For instance, in a case of degenerate heavy neutrinos and heavy Higgs masses at 15 TeV (in agreement with FCNC bounds) we get σ(pp → e + N ) > 10 fb at √ s = 14 TeV which is consistent with muon decay data for a very limited W 2 masses in the range (3008 GeV, 3040 GeV). Without restrictions coming from the muon data, W 2 masses would be in the range (1.0 TeV, 3.5 TeV). Influence of heavy Higgs particles themselves on the considered LHC process is negligible (the same is true for the light, SM neutral Higgs scalar analog). In the paper decay modes of the right-handed heavy gauge bosons and heavy neutrinos are also discussed. Both scenarios with typical see-saw lightheavy neutrino mixings and the mixings which are independent of heavy neutrino masses are considered. In the second case heavy neutrino decays to the heavy charged gauge bosons not necessarily dominate over decay modes which include only light, SM-like particles.

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Section: Jhep07(2012)038mentioning

confidence: 99%

Section: Jhep07(2012)038mentioning

confidence: 99%

“…see figure 5 in [2]. Mass of the lightest neutral Higgs scalar is assumed to be M H 0 0 = 120 GeV (∆r is not sensitive to this mass, see figure 6 in [2]).…”

Section: Jhep07(2012)038mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Left-right symmetry at LHC and precise 1-loop low energy data

Chakrabortty

Gluza

Sevillano

et al. 2012

J. High Energ. Phys.

Self Cite

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“…There are many theoretical and experimental papers devoted to the V + A weak interaction effects, lepton flavor, and CPV in the various leptonic and semileptonic processes, e.g. [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Right-handed chirality of muon neutrinos in polarized muon decay at rest

Sobków

2014

Eur. Phys. J. C

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In this paper, we analyze the polarized muon decay at rest admitting the non-standard V + A interaction in addition to the standard V − A interaction. We show that the angle-energy distribution of Dirac muon neutrinos (ν μ ') is sensitive to the interference terms between the standard V − A coupling of left-chirality ν μ and exotic V + A coupling of right-chirality one, which are proportional to the transverse components of ν μ spin polarization. The interferences do not vanish in the limit of massless ν μ and include the relative phases to test the CP violation. It allows one to calculate a neutrino flux for an assumed configuration of detector in the case of standard model prediction, and the upper limits on the neutrino flux for the left-right ν μ mixture. It is also demonstrated that the effects of neutrino mass and mixing are tiny corrections and can be omitted. The most important conclusion is that even in the massless ν μ limit, there are physical effects connected with the mixture of left-and righthanded helicity components in a spin 1/2 quantum state, when the exotic interaction V + A is admitted, contrary to the electron observables, where all the possible interferences vanish.

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Left-right symmetry and the charged Higgs bosons at the LHC

Bambhaniya

Chakrabortty

Gluza

et al. 2014

J. High Energ. Phys.

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The charged Higgs boson sector of the Minimal Manifest Left-Right Symmetric model (MLRSM) is investigated in the context of LHC discovery search for new physics beyond Standard Model. We discuss and summarise the main processes within MLRSM where heavy charged Higgs bosons can be produced at the LHC. We explore the scenarios where the amplified signals due to relatively light charged scalars dominate against heavy neutral Z 2 and charged gauge W 2 as well as heavy neutral Higgs bosons signals which are dumped due to large vacuum expectation value v R of the right-handed scalar triplet. Consistency with FCNC effects implies masses of two neutral Higgs bosons A 0 1 , H 0 1 to be at least of 10 TeV order, which in turn implies that in MLRSM only three of four charged Higgs bosons, namely H ±± 1,2 and H ± 1 , can be simultaneously light. In particular, production processes with one and two doubly charged Higgs bosons are considered. We further incorporate the decays of those scalars leading to multi lepton signals at the LHC. Branching ratios for heavy neutrino N R , W 2 and Z 2 decay into charged Higgs bosons are calculated. These effects are substantial enough and cannot be neglected. The tri-and four-lepton final states for different benchmark points are analysed. Kinematic cuts are chosen in order to strength the leptonic signals and decrease the Standard Model (SM) background. The results are presented using di-lepton invariant mass and lepton-lepton separation distributions for the same sign (SSDL) and opposite sign (OSDL) di-leptons as well as the charge asymmetry are also discussed. We have found that for considered MLRSM processes tri-lepton and four-lepton signals are most important for their detection when compared to the SM background. Both of the signals can be detected at 14 TeV collisions at the LHC with integrated luminosity at the level of 300 fb −1 with doubly charged Higgs bosons up to approximately 600 GeV. Finally, possible extra contribution of the charged MLRSM scalar particles to the measured Higgs to di-photon (H 0 0 → γγ) decay is computed and pointed out.

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Left–right symmetry and heavy particle quantum effects

Cited by 36 publications

References 49 publications

Left-right symmetry at LHC and precise 1-loop low energy data

Left-right symmetry at LHC and precise 1-loop low energy data

Right-handed chirality of muon neutrinos in polarized muon decay at rest

Left-right symmetry and the charged Higgs bosons at the LHC

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