High Energy Physics - Phenomenology · arXiv:0712.2954 v1 · submitted 18 Dec 2007
Study of the exclusive b → uℓ−ν̄ℓ decays in the MSSM with and without R-parity violation
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“We find that the charged Higgs effects and the R-parity violating effects could be large and measurable in some cases.”
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Abstract
We study the exclusive b → uℓ−ν̄ℓ(ℓ = τ,μ,e) decays in the MSSM with and without R-parity violation. From the experimental measurements of branching ratios ℬ(B−u → τ−ν̄τ), ℬ(B−u → M′0ℓ′−ν̄ℓ′) and ℬ(B̄0d → M′+ℓ′−ν̄ℓ′) (ℓ′ = μ,e,M′ = π,ρ), we derive new upper bounds on the relevant new physics parameters within the decays. Using the constrained new physics parameter spaces, we predict the charged Higgs effects and the R-parity violating effects on the branching ratios, the normalized forward-backward asymmetries of charged leptons, and the ratios of longitudinal to transverse polarization of the vector mesons, which have not been measured or have not been well measured yet. We find that the charged Higgs effects and the R-parity violating effects could be large and measurable in some cases. Our results could be used to probe new physics effects in the leptonic decays as well as the semileptonic decays, and will correlate with searches for direct supersymmetric signals in future experiments.
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: hedged possibility 0.93
What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.30 · human participants 0.01 · controlled comparison 0.20 · randomized assignment 0.01 · states quantitative result 0.17 · compares with prior results 0.19 · mentions code or data availability 0.02
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This table labels the abstract only (arXiv listing abstract v1). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| We study the exclusive $b \to u \ell^- \bar{\nu}_{\ell} (\ell=\tau,\mu,e)$ decays in the MSSM with and without R-parity violation. | contribution 1.00 | 0.92 | 0.03 | asserted 0.82 |
| From the experimental measurements of branching ratios $\mathcal{B}(B^-_u \to \tau^- \bar{\nu}_{\tau})$, $\mathcal{B}(B^-_u \to M'^0 \ell'^- \bar{\nu}_{\ell'})$ and $\mathcal{B}(\bar{B}^0_d \to M'^+ \ell'^- \bar{\nu}_{\ell'})$ $(\ell'=\mu,e, M'=\pi,\rho)$, we derive new upper bounds on the relevant new physics parameters within the decays. | method 0.48 | 0.91 | 0.06 | asserted 1.00 |
| Using the constrained new physics parameter spaces, we predict the charged Higgs effects and the R-parity violating effects on the branching ratios, the normalized forward-backward asymmetries of charged leptons, and the ratios of longitudinal to transverse polarization of the vector mesons, which have not been measured or have not been well measured yet. | contribution 0.71 | 0.88 | 0.09 | asserted 0.92 |
| We find that the charged Higgs effects and the R-parity violating effects could be large and measurable in some cases. | result 0.98 | 0.95 | 0.76 | hedged possibility 0.93 |
| Our results could be used to probe new physics effects in the leptonic decays as well as the semileptonic decays, and will correlate with searches for direct supersymmetric signals in future experiments. | interpretation 0.85 | 0.54 | 0.18 | hedged possibility 1.00 |
What kind of paper the classifier reports this is: theoretical result 0.91 · evidence from analysis of existing data 0.73
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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,708 input tokens, $0.0002 reported.
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Cited by 2 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
How the literature uses it
8 arXiv papers cite this in 13 sentences
Papers citing it · 11 sentences without a confident label
Cites it as background 2 papers
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Earlier, in the literature this mode is considered for NP searches [ref] , while $B→πℓν_ℓ$, with $ℓ= μ$ or $e$, is used for the extraction of CKM element $V_ub$ [ref] .
Correlating new physics signals in $B \to D^{(*)} \tau \nu_{\tau}$ with $B \to \tau \nu_{\tau}$ · $ℛ(π)$ and $ℛ^π_τ$ · 0.94
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The supersymmetric SM without $R$ parity is also studied in $b→u$ (semi)leptonic processes [ref] .
New physics contributions in $B\to\pi\tau\bar\nu$ and $B\to\tau\bar\nu$ · Introduction · 0.96
What it cites · 32 sentences without a confident label
Uses data or values from 1 paper
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In Ref. [ref] , from the experimental upper limit of $ℬ(B^+_u→τ^+ν_τ)<4.1×10^-4$, the authors got $tanβ/m_H=0.34(0.36,0.32) GeV^-1$ for $f__B_u=0.2(0.17,0.23) GeV$ with $ϵ_0=0$.
The effect of H^\pm on B^\pm -> \tau^\pm \nu and B^\pm -> \mu^\pm \nu · Numerical results in the MSSM with RPC · 0.81
Compares with 3 papers
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Compared with the existing bounds [ref] , which are estimated from the products of the smallest values of two single couplings, we get quite strong quadric bounds on $|λ^*_i22λ'_i13|$ and $|λ^*_i11λ'_i13|$, due to the slepton exchange couplings.
Phenomenological constraints on broken R parity symmetry in supersymmetry models · The exclusive $b→u ℓ' ν_ℓ' (ℓ'=μ e)$ decays · 0.99
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Compared with the existing bounds [ref] , which are estimated from the products of the smallest values of two single couplings, we get quite strong quadric bounds on $|λ^*_i22λ'_i13|$ and $|λ^*_i11λ'_i13|$, due to the slepton exchange couplings.
R-parity violating supersymmetry · The exclusive $b→u ℓ' ν_ℓ' (ℓ'=μ e)$ decays · 0.99
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Compared with the existing bounds [ref] , which are estimated from the products of the smallest values of two single couplings, we get quite strong quadric bounds on $|λ^*_i22λ'_i13|$ and $|λ^*_i11λ'_i13|$, due to the slepton exchange couplings.
Bounds on R-parity Violating Couplings at the Weak Scale and at the GUT Scale · The exclusive $b→u ℓ' ν_ℓ' (ℓ'=μ e)$ decays · 0.99
Cites as background 1 paper
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Note that the charged Higgs effects on the exclusive $b̅→u̅ τ^+ ν_τ$ decays have been discussed in Ref. [ref] , which fixed $tanβ=50$ and let physical quantity as a function of $m_H$.
Charged Higgs on $B^{-} \to \tau \bar\nu_{\tau}$ and $\bar B\to P(V) \ell \bar\nu_{\ell}$ · Numerical results in the MSSM with RPC · 0.85
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