New scalar resonances from sneutrino-Higgs-boson mixing in supersymmetry with small lepton number (<i>R</i>-parity) violation

Bar‐Shalom, Shaouly; Eilam, G.; Mele, B.

doi:10.1103/physrevd.64.095008

Cited by 8 publications

(5 citation statements)

References 30 publications

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“…• We will be interested in the properties (i.e., production and decay modes) of h RP V , which is the lightest CP-even Higgs state in the BRPV framework. This state has a Sneutrino component due to the Higgs-sneutrino mixing terms (i.e., ∝ δ B ) in the CP-even Higgs mass matrix [67,68]. The element Z h3 is the one which corresponds to the Sneutrino component in h RP V and is, therefore, responsible for theν τ − h mixing phenomena.…”

Section: A)mentioning

confidence: 99%

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R -parity violating supersymmetry and the 125 GeV Higgs boson signals

Cohen¹,

Bar‐Shalom²,

Eilam³

et al. 2019

Phys. Rev. D

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We study the impact of R-parity violating Supersymmetry (RPV SUSY) on the 125 GeV Higgs production and decay modes at the LHC. We assume a heavy SUSY spectrum with multi-TeV squarks and SU(2) scalar singlets as well as the decoupling limit in the SUSY Higgs sector. In this case the lightest CP-even Higgs is SM-like when R-parity is conserved. In contrast, we show that when R-parity violating interactions are added to the SUSY framework, significant deviations may occur in some production and decay channels of the 125 GeV Higgs-like state. Indeed, we assume a single-flavor (mostly third generation) Bilinear RPV (BRPV) interactions, which generate Higgs-sneutrino mixing, lepton-chargino mixing and neutrino-neutralino mixing, and find that notable deviations of O(20−30%) may be expected in the Higgs signal strength observables in some channels, e.g., in pp → h → µ + µ − , τ + τ − . Moreover, we find that new and detectable signals associated with BRPV Higgs decays to gauginos, h → ν τχ 0 2 and h → τ ± χ ∓ 2 , may also arise in this scenario. These decays yield a typical signature of h → τ ± ∓ + E T ( = e, µ, τ ) that can be much larger than in the SM, and may also be accompanied by an O(20 − 30%) enhancement in the di-photon signal pp → h → γγ. We also examine potential interesting signals of Trilinear R-parity violation (TRPV) interactions in the production and decays of the Higgs-sneutrino BRPV mixed state (assuming it is the 125 GeV scalar) and show that, in this case also, large deviations up to O(100%) are expected in e.g., pp → h → µ + µ − , τ + τ − , which are sensitive to the BRPV×TRPV coupling product.1 The CP-odd scalar mass matrix, m 2 O , has a massless state which corresponds to the Goldstone boson. 2 We note that too large values of δB may drive (depending on the other free-parameters in the Higgs sector) the lightest mass-squared eigenstates of both the CP-even and CP-odd mass matrices to non-physical negative values. We will thus demand non-negative mass-squared physical eigenvalues for the CP-even and CP-odd physical states by bounding δB accordingly.

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Section: A)mentioning

confidence: 99%

“…In this paper, we propose to interpret the observed 125 GeV Higgs-like state as a Higgs-sneutrino mixed state of the RPV SUSY framework [67,68] (throughout the paper we will loosely refer to the Higgs-sneutrino mixed state as the "Higgs"). We thus study the implications and effects of RPV SUSY on the 125 GeV Higgs signals.…”

Section: Introductionmentioning

confidence: 99%

R -parity violating supersymmetry and the 125 GeV Higgs boson signals

Cohen¹,

Bar‐Shalom²,

Eilam³

et al. 2019

Phys. Rev. D

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“…An important phenomenological consequence of R-parity violation is that the lightest SUSY particle (LSP) is not stable anymore. It has been shown [15,16,17,18,19,20,21,22,23,24,25] that R-parity violation through lepton number can also give rise to neutrino masses in more than one ways, both by tree-level (seesaw type) effects and radiative ones.…”

Section: Introductionmentioning

confidence: 99%

Bilarge neutrino mixing inR-parity violating supersymmetry: The role of right-chiral neutrino superfields

Mukhopadhyaya¹,

Srikanth²

2006

Phys. Rev. D

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We consider the possibility of neutrino mass generation in a supersymmetric model where lepton number can be violated by odd units. The different patterns of mixing in the quark and lepton sectors are attributed to the persence of right-chiral neutrino superfields which (a) enter into Yukawa couplings via non-renormalizable interaction with hidden sector fields, and (b) can violate lepton number by odd units. Both of these features are shown to be the result of some global quantum number which is violated when SUSY is broken in the hidden sector. It is shown how such a scenario, together with all known R-parity violating effects, can lead to neutrino masses and bilarge mixing via seesaw as well as radiative mechanisms. Some sample values of the various parameters involved, consistent with electroweak symmetry breaking constraints, are presented as illustrations.

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“…A sneutrino NLSP with a gravitino LSP would not change our phenomenological results 4. Gauge boson and top quark pair production through a sneutrino resonance in trilinear RpV was studied in[30] while the full set of heavy SM modes have been mentioned in BRpV models in[31] 5 This simplification does not affect our main conclusions.…”

mentioning

confidence: 98%

“…The R-parity breaking parameters have been fixed by adjusting neutrino observables to their best fit point values [44,45,46] and 3 = µ × 10 −9 . We have checked that the values are insensitive to changes in tan β in the range [2,30]. Off-shell calculations of the Higgs and top states have been neglected since the different lepton flavor final states dominant over the full sneutrino mass range.…”

Section: Lsp Sneutrino Phenomenologymentioning

confidence: 99%

LSP sneutrino novel decays

Sierra

Restrepo

Spinner

2013

J. High Energ. Phys.

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In bilinear R-parity violation (BRpV), in which the superpotential includes a bilinear term between the lepton doublet and the up-type Higgs superfields, a sneutrino LSP can decay into pairs of heavy standard model states (W s, Zs, tops or Higgs bosons), neutrinos or different-flavor charged lepton modes (l i l j ). These finals states can dominate over the traditionally considered bottom pair final state and would lead to unique and novel supersymmetric signals: multileptons events or pairs of heavy standard model fields. We investigate this possibility and find that the branching ratio into these states dominates when the bilinear term is much smaller than the sneutrino vacuum expectation value for a given sneutrino flavor. When BRpV is the only source of neutrino masses these decays can only dominate for one of the sneutrino generations. Relaxing this constraint opens these channels for all three generations.

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New scalar resonances from sneutrino-Higgs-boson mixing in supersymmetry with small lepton number (R-parity) violation

Cited by 8 publications

References 30 publications

R -parity violating supersymmetry and the 125 GeV Higgs boson signals

R -parity violating supersymmetry and the 125 GeV Higgs boson signals

Bilarge neutrino mixing inR-parity violating supersymmetry: The role of right-chiral neutrino superfields

LSP sneutrino novel decays

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