Parity violation in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>γ</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mi>p</mml:mi></mml:math>Compton scattering

Chen, Jiunn-Wei; Cohen, Thomas D.; Kao, Cheng−Yan

doi:10.1103/physrevc.64.055206

Cited by 39 publications

(83 citation statements)

References 27 publications

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“…In this table we also present the values of the branching ratio obtained in HQET [19]. Comparing the results of both approaches, we see that our predictions on the branching ratios for the Ã b !…”

Section: Numerical Analysismentioning

confidence: 59%

“…This transition has been investigated in [15,16] also in the context of the HQET but in the same framework using the distribution amplitudes of the Ã and Ã b , respectively. Moreover, form factors, branching ratio, and dilepton forward-backward asymmetries are studied in [17][18][19] also within the context of the HQET. In [20][21][22], AE b;c and Ã b;c to nucleon transitions are also evaluated using the nucleon wave functions in the light cone QCD sum rules approach.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of theΛb→Λl+l−decay in QCD

2010

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Taking into account the Ã baryon distribution amplitudes and the most general form of the interpolating current of the Ã b , the semileptonicÀ transition is investigated in the framework of the light cone QCD sum rules. Sum rules for all 12 form factors responsible for the Ã b ! Ã' þ ' À decay are constructed. The obtained results for the form factors are used to compute the branching fraction. A comparison of the obtained results with the existing predictions of the heavy quark effective theory is presented. The results of the branching ratio shows the detectability of this channel at the Large Hadron Collider beauty in the near future is quite high.

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Section: Numerical Analysismentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Analysis of theΛb→Λl+l−decay in QCD

2010

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“…The contribution of the former originates mainly from the P -odd combination of Compton helicity amplitudes |T 1, | 2 which is non-zero in the presence of both P -and T -violation. The parity-violating asymmetry was first considered in [9] and it is expected to be of order 10 −8 at forward angles. If CP -violation is due to a non-zero QCD θ-term that is very tightly constrained by the experimental limit on EDM, the expected value of the single spin asymmetry in Eq.…”

Section: Experimental Access To the T -Odd Polarizabilitiesmentioning

confidence: 99%

“…Although this effect is tiny as compared to the parity-violating contribution, by going to very backward angles this latter is highly suppressed due to the cos 4 θ 2 factor in front. It furthermore has a cubic dependence on the photon energy [9]. Another important background is represented by the analyzing power of Compton scattering.…”

Section: Experimental Access To the T -Odd Polarizabilitiesmentioning

confidence: 99%

CP violation in Compton scattering

Gorchtein

2008

Phys. Rev. C

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I consider Compton scattering off the nucleon in the presence of T violation. I construct the Compton tensor which possesses these features and consider low energy expansion (LEX) of the corresponding amplitudes. It allows to separate out the Born contribution which only depends on the static properties of the nucleon, such as the electric charge, the mass, the magnetic moment, and the electric dipole moment (EDM). I introduce new structure constants, the T -odd nucleon polarizabilities which parametrize the unknown non-Born part. These constants describe the response of the T -violating content of the nucleon to the external quasistatic electromagnetic field. As an estimate, I provide a HBChPT calculation for these new polarizabilities and discuss the implications for the experiment.

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“…No measurement of a PV observable in the single-nucleon sector exists; however, PV asymmetries in Compton scattering [30,31] and pion production [32,33], as well as the nucleon anapole moment [34,35,36] have been considered theoretically. The Lagrangian of Eq.…”

Section: Pos(cd15)043mentioning

confidence: 99%

Hadronic parity violation in effective field theory

Schindler¹

2016

Proceedings of the 8th International Workshop on Chiral Dynamics — PoS(CD15)

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Parity-violating interactions between nucleons are the manifestation of an interplay of strong and weak interactions between quarks in the nucleons. Because of the short range of the weak interactions, these parity-violating forces provide a unique probe of low-energy strong interactions. An ongoing experimental program is mapping out this weak component of the nuclear force in few-nucleon systems. Recent theoretical progress in analyzing and interpreting hadronic parity violation in such systems based on effective field theory methods is described. In particular, important information on parity-violating nucleon-nucleon interactions can be gained from an asymmetry in deuteron photodisintegration, which might be measurable at a future high-intensity photon source such as the proposed upgraded HIGS facility.

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Parity violation inγ→pCompton scattering

Cited by 39 publications

References 27 publications

Analysis of theΛb→Λl+l−decay in QCD

Analysis of theΛb→Λl+l−decay in QCD

CP violation in Compton scattering

Hadronic parity violation in effective field theory

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