First Precision Measurement of the Parity Violating Asymmetry in Cold Neutron Capture on 
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Baeßler, S.; Barrón‐Palos, L.; Birge, N.; Bowman, J. D.; Calarco, J. R.; Cianciolo, V.; Coppola, C. E.; Crawford, Christopher; Fomin, N.; Garishvili, I.; Greene, Geoffrey L.; Hale, G. M.; Hamblen, J.; Hayes, C.; Iverson, Erik B.; Kabir, M. L.; McCrea, Mark; Plemons, E.; Ramírez-Morales, A.; Mueller, P. E.; Novikov, Ivan; Penttilä, S. I.; Scott, E.; Watts, J. W.; Wickersham, C.

doi:10.1103/physrevlett.125.131803

Cited by 14 publications

(7 citation statements)

References 20 publications

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“…(8,9) of Ref. [6], to compare with the experimental result (1.55 ± 0.97(stat) ± 0.24(sys)) × 10 −8 [6]. Evidently the value of the asymmetry is sensitive to a partial cancellation of the various contributions [6].…”

Section: Comparisons With Experimentsmentioning

confidence: 84%

“…Comparing with the constraints on the parity-violating vector-meson-nucleon coupling constants that emerge from the combined analysis of the np → dγ [5] and n 3 He → tγ [6] experiments, within the theoretical framework of Ref. [35], we have h 1…”

Section: Comparisons With Experimentsmentioning

confidence: 99%

“…[6], to compare with the experimental result (1.55 ± 0.97(stat) ± 0.24(sys)) × 10 −8 [6]. Evidently the value of the asymmetry is sensitive to a partial cancellation of the various contributions [6]. The h 1 π determination from the np → dγ experiment, h 1 π = 2.6(1.2) stat (0.2) sys × 10 −7 [5] is in slight tension with the value determined by the non-observation of the photon circular polarization in 18 F radiative decay from the 1.081 MeV J P T = 0 − 0 state, reflecting an absence of mixing with the nearby 1.042 MeV 0 + 1 state, yielding the bound |h 1 π | < 1.3 × 10 −7 at 67% CL [37].…”

Section: Comparisons With Experimentsmentioning

confidence: 99%

“…The low-energy nature of these studies has meant that its theoretical description has focused on phenomenological realizations in hadronic degrees of freedom, with the long-held expectation that the charged pion exchange interaction should strongly dominate [1]. Despite the small mass of the pion relative to the 1 GeV scale, this has not proven to be the case; rather, isoscalar and isotensor interactions, also appear to play important phenomenological roles [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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QCD Analysis of $ΔS=0$ Hadronic Parity Violation

Gardner¹,

Muralidhara²

2022

Preprint

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We present a QCD analysis of the effective weak Hamiltonian at hadronic energy scales for strangeness-nonchanging (∆S = 0) hadronic processes. Performing a leading-order renormalization group analysis in QCD from the W to the O(2 GeV) energy scale, we derive the pertinent effective Hamiltonian for hadronic parity violation, including the effects of both neutral and charged weak currents. We compute the complete renormalization group evolution of all isosectors and the evolution through heavy-flavor thresholds for the first time. We show that the additional four-quark operators that enter below the W mass scale from QCD operator mixing effects form a closed set, and they result in a 12×12 anomalous dimension matrix. We use the resulting effective Hamiltonian to determine the parity-violating meson-nucleon coupling constants, h 1 π , h 0,1,2 ρ , h 0,1 ω , employing the factorization Ansatz and assessments of the pertinent quark charges of the nucleon in lattice QCD at the 2 GeV scale. Using these results we connect to earlier calculations of low-energy, hadronic parity-violating observables in few-nucleon systems to make theoretical predictions that we compare with experimental results, which affirm important roles for each of the isosectors.

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Section: Comparisons With Experimentsmentioning

confidence: 84%

Section: Comparisons With Experimentsmentioning

confidence: 99%

Section: Comparisons With Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

QCD Analysis of $ΔS=0$ Hadronic Parity Violation

Gardner¹,

Muralidhara²

2022

Preprint

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“…Relativistic beams of spin-polarized charged particles, such as leptons and ions, play a crucial role in exploring the fundamental structures [1][2][3] and interactions [4][5][6][7], with the advantage of an increased number of measurable observables and unprecedented test precision [8,9]. They can provide direct access to study new physics beyond the standard model [10], characterize the quantum numbers and chiral couplings of new particles [8,11], investigate spin-dependent nuclear interactions [12][13][14], and increase the cross-section and control the angular distribution of the reaction products in nuclear fusion reactions [15,16].…”

mentioning

confidence: 99%

All-optical ultrafast spin rotation for relativistic charged particle beams

Wei¹,

Wan²,

Salamin³

et al. 2022

Preprint

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An all-optical method of ultrafast spin rotation is put forward to precisely manipulate the polarization of relativistic charged particle beams of leptons or ions. In particular, laser-driven dense ultrashort beams are manipulated via single-shot interaction with a co-propagating moderate temporally asymmetric (frequency-chirped or subcycle THz) laser pulse. Using semi-classical numerical simulations, we find that in a temporally asymmetrical laser field, the spin rotation of a particle can be determined from the flexibly controllable phase retardation between its spin precession and momentum oscillation. An initial polarization of a proton beam can be rotated to any desired orientation (e.g., from the common transverse to the more useful longitudinal polarization) with extraordinary precision (better than 1%) in tens of femtoseconds using a feasible frequencychirped laser pulse. Moreover, the beam qualities, in terms of energy and angular divergence, can be significantly improved in the rotation process. This method has potential applications in various areas involving ultrafast spin manipulation, like laser-plasma, laser-nuclear and high-energy particle physics.

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