Nucleon and dinucleon decays to leptonic final states in a left-right symmetric model with large extra dimensions

Girmohanta, Sudhakantha

doi:10.1140/epjc/s10052-021-08936-w

Cited by 6 publications

(6 citation statements)

References 76 publications

(121 reference statements)

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“…In literature, refs. [12,17] also provide a bunch of dim-12 operators contributing to dinucleon to dilepton transitions in the SMEFT. We find the operators given in [12] are neither complete nor independent as a basis.…”

Section: Jhep06(2021)047mentioning

confidence: 99%

“…[9,11], the authors considered a class of such models which involve new scalar-fermion and scalar-quartic interactions, meanwhile, the left-right symmetric models with extra-dimensions considered in refs. [12,17] can also do the job. On the other hand, from the above limit of NP scale we have set, one may expect JHEP06(2021)047 .…”

Section: Jhep06(2021)047mentioning

confidence: 99%

“…For the ∆L = ±2 case, the interesting processes are the dinucleon to dilepton decays in nuclei, including pp → + + , pn → +ν and nn →νν with ( ) = e, µ, τ andν(ν ) =ν e ,ν µ ,ν τ , respectively. 3 Such processes get less attention than the above mentioned ∆B = 1 and n−n oscillation processes [9,12,16,17], but they may open new avenues for the baryon number violation signals due to their distinct theoretical origin and clear experimental signatures. 4 The most stringent lower limits on the partial lifetime of those dinucleon to dilepton decays in oxygen 16 O and carbon 12 C nuclei are reported by the earlier Frejus and KamLAND experiments [19,20] and the recent Super-K results [21,22], and are collected in table 1 for our latter use.…”

Section: Introductionmentioning

confidence: 99%

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An EFT toolbox for baryon and lepton number violating dinucleon to dilepton decays

2021

J. High Energ. Phys.

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In this paper we systematically consider the baryon (B) and lepton (L) number violating dinucleon to dilepton decays (pp → ℓ+ℓ′+, pn → $$ {\mathrm{\ell}}^{+}\overline{\nu}^{\prime } $$ ℓ + ν ¯ ′ , nn → $$ \overline{\nu}\overline{\nu}^{\prime } $$ ν ¯ ν ¯ ′ ) with ∆B = ∆L = −2 in the framework of effective field theory. We start by constructing a basis of dimension-12 (dim-12) operators mediating such processes in the low energy effective field theory (LEFT) below the electroweak scale. Then we consider their standard model effective field theory (SMEFT) completions upwards and their chiral realizations in baryon chiral perturbation theory (BχPT) downwards. We work to the first nontrivial orders in each effective field theory, collect along the way the matching conditions, and express the decay rates in terms of the Wilson coefficients associated with the dim-12 operators in the SMEFT and the low energy constants pertinent to BχPT. We find the current experimental limits push the associated new physics scale larger than 1 − 3 TeV, which is still accessible to the future collider searches. Through weak isospin symmetry, we find the current experimental limits on the partial lifetime of transitions pp → ℓ+ℓ′+, pn → $$ {\mathrm{\ell}}^{+}\overline{\nu}^{\prime } $$ ℓ + ν ¯ ′ imply stronger limits on nn → $$ \overline{\nu}\overline{\nu}^{\prime } $$ ν ¯ ν ¯ ′ than their existing lower bounds, which are improved by 2−3 orders of magnitude. Furthermore, assuming charged mode transitions are also dominantly generated by the similar dim-12 SMEFT interactions, the experimental limits on pp → e+e+, e+μ+, μ+μ+ lead to stronger limits on pn → $$ {\mathrm{\ell}}_{\alpha}^{+}{\overline{\nu}}_{\beta } $$ ℓ α + ν ¯ β with α, β = e, μ than their existing bounds. Conversely, the same assumptions help us to set a lower bound on the lifetime of the experimentally unsearched mode pp → e+τ+ from that of pn → $$ {e}^{+}{\overline{\nu}}_{\tau } $$ e + ν ¯ τ , i.e., $$ {\Gamma}_{pp\to {e}^{+}{\tau}^{+}}^{-1}\gtrsim 2\times {10}^{34} $$ Γ pp → e + τ + − 1 ≳ 2 × 10 34 yr.

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Section: Jhep06(2021)047mentioning

confidence: 99%

Section: Jhep06(2021)047mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An EFT toolbox for baryon and lepton number violating dinucleon to dilepton decays

2021

J. High Energ. Phys.

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“…The neutron invisible decay has two modes: n → inv and nn → inv. Invisible modes are dominant in some new physics models [17][18][19][20]. The SNO+ experiment sets the current best limit for single neutron disappearance at τ /B(n → inv) > 9.0 × 10 29 years (90% C.L.…”

Section: Introductionmentioning

confidence: 99%

JUNO sensitivity to low energy atmospheric neutrino spectra

Abusleme¹,

Adam²,

Ahmad³

et al. 2021

Eur. Phys. J. C

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Atmospheric neutrinos are one of the most relevant natural neutrino sources that can be exploited to infer properties about cosmic rays and neutrino oscillations. The Jiangmen Underground Neutrino Observatory (JUNO) experiment, a 20 kton liquid scintillator detector with excellent energy resolution is currently under construction in China. JUNO will be able to detect several atmospheric neutrinos per day given the large volume. A study on the JUNO detection and reconstruction capabilities of atmospheric $$\nu _e$$ ν e and $$\nu _\mu $$ ν μ fluxes is presented in this paper. In this study, a sample of atmospheric neutrino Monte Carlo events has been generated, starting from theoretical models, and then processed by the detector simulation. The excellent timing resolution of the 3” PMT light detection system of JUNO detector and the much higher light yield for scintillation over Cherenkov allow to measure the time structure of the scintillation light with very high precision. Since $$\nu _e$$ ν e and $$\nu _\mu $$ ν μ interactions produce a slightly different light pattern, the different time evolution of light allows to discriminate the flavor of primary neutrinos. A probabilistic unfolding method has been used, in order to infer the primary neutrino energy spectrum from the detector experimental observables. The simulated spectrum has been reconstructed between 100 MeV and 10 GeV, showing a great potential of the detector in the atmospheric low energy region.

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“…A series of recent workshops and associated reports have served as both a nursery and a stage for much of this collective progress, and have inspired this work; for those interested, consider [7,[17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Progress and simulations for intranuclear neutron-antineutron transformations in Ar1840

et al. 2020

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With the imminent construction of the Deep Underground Neutrino Experiment (DUNE) and Hyper-Kamiokande, nucleon decay searches as a means to constrain beyond Standard Model (BSM) extensions are once again at the forefront of fundamental physics. Abundant neutrons within these large experimental volumes, along with future high-intensity neutron beams such as the European Spallation Source, offer a powerful, high-precision portal onto this physics through searches for B and B − L violating processes such as neutron-antineutron transformations (n →n), a key prediction of compelling theories of baryogenesis. With this in mind, this paper discusses a novel and self-consistent intranuclear simulation of this process within 40 18 Ar, which plays the role of both detector and target within DUNE's gigantic liquid argon time projection chambers. An accurate and independent simulation of the resulting intranuclear annihilation respecting important physical correlations and cascade dynamics for this large nucleus is necessary to understand the viability of such rare searches when contrasted against background sources such as atmospheric neutrinos. Recent theoretical improvements to our model, including the first calculation of 40 18 Ar'sn-intranuclear suppression factor, and Monte Carlo simulation comparisons to another publicly available n →n generator within GENIE, are also discussed.

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Nucleon and dinucleon decays to leptonic final states in a left-right symmetric model with large extra dimensions

Cited by 6 publications

References 76 publications

An EFT toolbox for baryon and lepton number violating dinucleon to dilepton decays

An EFT toolbox for baryon and lepton number violating dinucleon to dilepton decays

JUNO sensitivity to low energy atmospheric neutrino spectra

Progress and simulations for intranuclear neutron-antineutron transformations in Ar1840

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