New-Physics Effects on Triple-Product Correlations in Lambda_b Decays

Abstract

We adopt an effective-lagrangian approach to compute the new-physics contributions to T-violating triple-product correlations in charmless Lambda_b decays. We use factorization and work to leading order in the heavy-quark expansion. We find that the standard-model (SM) predictions for such correlations can be significantly modified. For example, triple products which are expected to vanish in the SM can be enormous (~50%) in the presence of new physics. By measuring triple products in a variety of Lambda_b decays, one can diagnose which new-physics operators are or are not present. Our general results can be applied to any specific model of new physics by simply calculating which operators appear in that model.

20 pages, LaTeX, no figures. Added a paragraph (+ references) discussing nonfactorizable effects. Conclusions unchanged

References in corpus (5)

• Probing for New Physics in Polarized ${\Lambda }_b$ decays at the Z
• Flavour-Changing Neutral Currents and Leptophobic Z' Gauge Bosons
• T-Violating Triple-Product Correlations in Charmless Lambda_b Decays
• Constraining R-parity violating couplings from B --> PP decays using QCD improved factorization method
• Improved measurement of the CP-violating asymmetry amplitude sin2beta

Cited by in corpus (39)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Triple-Product Correlations in B -> V1 V2$ Decays and New Physics
• Measurement of matter-antimatter differences in beauty baryon decays
• The Full $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution and CP violating Triple Products
• ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay in the Standard Model and with New Physics
• Study of the $D^{0}p$ amplitude in ${\Lambda }_b^0\to D^{0}p{\pi }^{-}$ decays
• The Azimuthal $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution with Tensor Operators
• Measuring New-Physics Parameters in B Penguin Decays
• Methods for Measuring New-Physics Parameters in B Decays
• Search for CP violation using $T$-odd correlations in $D^0\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ decays
• Search for T Violation in Charm Meson Decays
• Search for CP violation using triple product asymmetries in ${\Lambda }_b^0\to p{K}^{-}{\pi }^{+}{\pi }^{-}$, ${\Lambda }_b^0\to p{K}^{-}{K}^{+}{K}^{-}$ and ${\Xi }_b^0\to p{K}^{-}{K}^{-}{\pi }^{+}$ decays
• Study of CP violation in ${\Lambda }_c^{+}$ decay
• Four-body baryonic decays of $B\to p\bar{p}{\pi }^{+}{\pi }^{-}({\pi }^{+}{K}^{-})$ and $\Lambda \bar{p}{\pi }^{+}{\pi }^{-}(K^{+}{K}^{-})$
• Search for CP violation using $T$-odd correlations in $D^{+}\to K^{+}{K}_S^0{\pi }^{+}{\pi }^{-}$ and $D_s^{+}\to K^{+}{K}_S^0{\pi }^{+}{\pi }^{-}$ decays
• Time-reversal asymmetries and angular distributions in ${\Lambda }_b\to \Lambda V$
• "Could Charm (\& $\tau$) Transitions be the `Poor Princesses' of Deeper Understanding of Fundamental Dynamics?" -- or -- "Finding Novel Forces?"
• Estimates of exchange topological contributions and $CP$-violating observables in ${\Lambda }_b\to \Lambda \varphi$ decay
• Nonleptonic ${\Lambda }_b$ decays to $D_s(2317)$, $D_s(2460)$ and other final states in Factorization
• CP violation in multibody decays of beauty baryons
• T-violating triple product asymmetries in Lambda_b --> Lambda pi pi decay
• Analysis of angular distribution asymmetries and the associated $CP$ asymmetries in three-body decays of bottom baryons
• First measurement of $\mathbf{T}$-odd moments in ${\mathbf{D}}^0\to {\mathbf{K}}_{\mathbf{S}}^0{\mathbf{\pi }}^{+}{\mathbf{\pi }}^{-}{\mathbf{\pi }}^0$ decays
• CPT violation and triple-product correlations in B decays
• Sizable Time-reversal violating effects in bottom baryon decays
• Searching for $CP$ violation through two-dimensional angular distributions in four-body decays of bottom and charmed baryons
• Model Independent Tests for Time Reversal and CP Violations and for CPT Theorem in Λ_b and \barΛ_b Two Body Decays
• Final-state rescattering mechanism in bottom-baryon decays
• Experimental prospects for C, P, T, CP, and CPT tests
• Searching for New Physics by means of Relative Phases and Moduli of Decay Amplitudes
• CP Violation In Baryon Decays At LHCb
• Searching for New Physics in Semi-Leptonic Baryon Decays
• Baryon Polarization, Phases of Amplitudes and Time Reversal Odd Observables
• Exploring the simplest purely baryonic decay processes
• Search for $CP$ violation in $D_{(s)}^{+}\to K^{+}{K}_S^0{h}^{+}{h}^{-}$ $(h=K,\pi )$ decays and observation of the Cabibbo-suppressed decay $D_s^{+}\to K^{+}{K}^{-}{K}_S^0{\pi }^{+}$
• Interference Effects, Time Reversal Violation and Search for New Physics in Hadronic Weak Decays
• T-odd Observables in Elastic Scattering, in Deep Inelastic Processes and in Weak Decays