Parity violation in proton-proton scattering at 45 MeV

Balzer, R.; Henneck, R.; Jacquemart, Ch.; Lang, J.; Nessi‐Tedaldi, F.; Roser, T.; Simonius, M.; Haeberli, W.; Jaccard, Samuel L.; Reichart, W.; Weddigen, Ch.

doi:10.1103/physrevc.30.1409

Cited by 46 publications

(46 citation statements)

References 23 publications

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“…In Ref. [9] we determined the relative phase between f ρ and h i ρ using the sign of the measured PV pp elastic asymmetry [36][37][38][39] and the VMD contribution to nucleon charge radii [40]. The resulting phase is h i ρ /f ρ > 0.…”

Section: Transition Anapolementioning

confidence: 99%

Electroweak corrections to parity-violating neutral current scattering

1990

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We analyze the degree to which parity-violating (PV) electroexcitation of the ∆(1232) resonance may be used to extract the weak neutral axial vector transition form factors. We find that the axial vector electroweak radiative corrections are large and theoretically uncertain, thereby modifying the nominal interpretation of the PV asymmetry in terms of the weak neutral form factors. We also show that, in contrast to the situation for elastic electron scattering, the axial N → ∆ PV asymmetry does not vanish at the photon point as a consequence of a new term entering the radiative corrections. We argue that an experimental determination of these radiative corrections would be of interest for hadron structure theory, possibly shedding light on the violation of Hara's theorem in weak, radiative hyperon decays.

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Section: Transition Anapolementioning

confidence: 99%

Electroweak corrections to parity-violating neutral current scattering

1990

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“…It has been over half a century since Lee and Yang first suggested the possibility of parity non-conservation in the weak interaction [45], which was confirmed expermentially shortly thereafter by Wu et al [46][47][48][49][50]. Modern day experimental [51][52][53][54][55][56][57][58][59][60] and theoretical [61][62][63][64][65] studies have given attention to parity violating two-nucleon processes, where the strong interactions are most precisely understood. These include proton-neutron fusion, p + n → d + γ, and elastic proton scattering,…”

mentioning

confidence: 99%

Relativistic, model-independent, multichannel 2→2 transition amplitudes in a finite volume

2016

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We derive formalism for determining 2 + J → 2 infinite-volume transition amplitudes from finitevolume matrix elements. Specifically, we present a relativistic, model-independent relation between finite-volume matrix elements of external currents and the physically observable infinite-volume matrix elements involving two-particle asymptotic states. The result presented holds for states composed of two scalar bosons. These can be identical or non-identical and, in the latter case, can be either degenerate or non-degenerate. We further accommodate any number of strongly-coupled two-scalar channels. This formalism will, for example, allow future lattice QCD calculations of the ρ-meson form factor, in which the unstable nature of the ρ is rigorously accommodated.

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“…Such experiments require measurements of asymmetries ∼ 10 −7 , which is the natural scale for the ratio of weak and strong amplitudes, 4πG F m 2 π /g 2 πN N . Only a single N N measurement, the longitudinal analyzing power A z for p + p, has been successful (40,41,42). (Experiments have been done at 13.6, 45, and 221 MeV.)…”

Section: The Hadronic Weak Interactionmentioning

confidence: 99%

Atomic Parity Nonconservation and Nuclear Anapole Moments

Haxton¹,

Wieman²

2008

Collected Papers of Carl Wieman

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Anapole moments are parity-odd, time-reversal-even moments of the E1 projection of the electromagnetic current. Although it was recognized, soon after the discovery of parity violation in the weak interaction, that elementary particles and composite systems like nuclei must have anapole moments, it proved difficult to isolate this weak radiative correction. The first successful measurement, an extraction of the nuclear anapole moment of 133 Cs from the hyperfine dependence of the atomic parity violation, was obtained only recently. An important anapole moment bound in Tl also exists. We discuss these measurements and their significance as tests of the hadronic weak interaction, focusing on the mechanisms that operate within the nucleus to generate the anapole moment. The atomic results place new constraints on weak meson-nucleon couplings, ones we compare to existing bounds from a variety of p − p and nuclear tests of parity nonconservation.

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Parity violation in proton-proton scattering at 45 MeV

Cited by 46 publications

References 23 publications

Electroweak corrections to parity-violating neutral current scattering

Electroweak corrections to parity-violating neutral current scattering

Relativistic, model-independent, multichannel 2→2 transition amplitudes in a finite volume

Atomic Parity Nonconservation and Nuclear Anapole Moments

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