Parity violation in electron scattering

Souder, P. A.; Paschke, K.

doi:10.1007/s11467-015-0482-0

Cited by 14 publications

(8 citation statements)

References 117 publications

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“…Consequently, the mass mixing coupling provides an excellent prototype for the phenomenology of enhanced longitudinal emission. This coupling has also been the subject of several phenomenological studies (see e.g., [19][20][21][23][24][25][26][27][28][29][30][31][32]), including motivations for new parity-violation experiments [21,33,34]. Previous studies of X-Z mixing have generally assumed that it leads to 1/m X -enhanced amplitudes for h → ZX at tree level [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Light vectors coupled to bosonic currents

2019

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New spin-1 particles with masses below the weak scale are present in many theories of beyond Standard Model (SM) physics. In this work, we extend previous analyses by systematically considering the couplings of such a vector to the bosonic sector of the SM, focusing on models that lead to mass-mixing with the Z boson. These couplings generically lead to enhanced emission of the vector's longitudinal mode, both in Higgs decays and in flavor changing meson decays. We present bounds in the SM+X effective theory and investigate their model-dependence. For the case of Higgs decays, we point out that tree-level vector emission is, depending on the model, not always enhanced, affecting the constraints. For meson decays, which are the dominant constraints at small vector masses, we find that while B decay constraints can be weakened by fine-tuning UV parameters, it is generically difficult to suppress the stringent constraints from kaon decays.

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Section: Introductionmentioning

confidence: 99%

Light vectors coupled to bosonic currents

2019

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“…In fact, similar approaches have been adopted in the asymmetrical electroproduction of the baryon ∆(1236) by polarized ep scattering [11,71], in parametrizing the parity violation in electron-nucleon scattering (see, e.g., Ref. [72]), and recently in evaluating the cross section of inverse beta decay [73,74].…”

Section: Initial-and Final-state Hadronic Effectsmentioning

confidence: 99%

Prospects for discovering new physics in charm sector through low-energy scattering processes $e^-p\to e^- (μ^-)Λ_c$

Lai,

Li,

Yan

et al. 2021

Preprint

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We investigate the potential for discovering new physics through the low-energy scattering processes e − p → e − (µ − )Λc, which could be accessible in the forthcoming ep scattering experiments once adapted to our proposed setups. In the framework of low-energy effective Lagrangian, we demonstrate that, compared with the conventional flavor-changing-neutral-current weak decays of charmed hadrons and the dilepton productions at high-energy colliders, the low-energy scattering processes can provide more competitive potentials for hunting the underlying new physics. In some specific leptoquark models, we also show that promising event rates can be expected for both the scattering processes, and point out a possible way to distinguish the experimental signals due to the scalar leptoquarks from those of the vector ones.

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“…[3] for a review. The asymmetry A PV has been (will be) measured with high precision in low-energy polarized electron scattering processes [4], such as Møller scattering e − e − → e − e − [5,6] ( [7]), as well as electron-proton [8][9][10][11][12] ( [13]), electron-deuteron [14][15][16][17][18][19], electron-4 He [20], electron-9 Be [21], electron-12 C [22] ( [13]) and electron-208 Pb [23] scatterings. In addition, there are precise measurements of atomic parity violation (APV) using 133 Cs [24][25][26][27], 205 Tl [28,29],…”

Section: Introductionmentioning

confidence: 99%

Searching for $Z'$ bosons at the P2 experiment

Dev,

Rodejohann,

et al. 2021

Preprint

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The P2 experiment aims at high-precision measurements of the parityviolating asymmetry in elastic electron-proton and electron-12 C scatterings with longitudinally polarized electrons. We discuss here the sensitivity of P2 to new physics mediated by an additional neutral gauge boson Z of a new U (1) gauge symmetry. If the charge assignment of the U (1) is chiral, i.e., left-and right-handed fermions have different charges under U (1) , additional parity-violation is induced directly. On the other hand, if the U (1) has a non-chiral charge assignment, additional parity-violation can be induced via mass or kinetic Z-Z mixing. We show that in both cases P2 can obtain limits that are comparable to or stronger than the existing constraints over a wide range of Z mass. In particular, for chiral models, the P2 experiment can probe gauge couplings at the order of 10 −5 when the Z boson is light, and heavy Z bosons up to 79 (90) TeV in the proton ( 12 C) mode. For non-chiral models with mass mixing, the P2 experiment is sensitive to mass mixing angles smaller than roughly 10 −4 , depending on model details and gauge coupling magnitude.

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Parity violation in electron scattering

Cited by 14 publications

References 117 publications

Light vectors coupled to bosonic currents

Light vectors coupled to bosonic currents

Prospects for discovering new physics in charm sector through low-energy scattering processes $e^-p\to e^- (μ^-)Λ_c$

Searching for $Z'$ bosons at the P2 experiment

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