Radiative and chiral corrections to elastic lepton-proton scattering in chiral perturbation theory

Talukdar, Pulak; Shastry, Vanamali; Raha, Udit; Myhrer, F.

doi:10.1103/physrevd.104.053001

Cited by 10 publications

(5 citation statements)

References 80 publications

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“…The correction δ 2γ for µp scattering has been computed in several theoretical approaches, such as dispersion theory [11,14] and chiral effective field theory [15][16][17]. In this work we use the results of Ref.…”

Section: A Lepton-proton Elastic Scatteringmentioning

confidence: 99%

Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory

et al. 2019

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We extract the proton charge radius from the elastic form factor (FF) data using a novel theoretical framework combining chiral effective field theory and dispersion analysis. Complex analyticity in the momentum transfer correlates the behavior of the spacelike FF at finite Q 2 with the derivative at Q 2 = 0. The FF calculated in the predictive theory contains the radius as a free parameter. We determine its value by comparing the predictions with a descriptive global fit of the spacelike FF data, taking into account the theoretical and experimental uncertainties. Our method allows us to use the finite-Q 2 FF data for constraining the radius (up to Q 2 ∼ 0.5 GeV 2 and larger) and avoids the difficulties arising in methods relying on the Q 2 → 0 extrapolation. We obtain a radius of 0.844(7) fm, consistent with the high-precision muonic hydrogen results.

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Section: A Lepton-proton Elastic Scatteringmentioning

confidence: 99%

Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory

et al. 2019

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“…We note that the electron behaves relativistically whereas the muon mass is not ultra-relativistic at these low MUSE energies, see Ref. [74] for complete discussions.…”

Section: Radiative Corrections For Musementioning

confidence: 86%

“…We will concentrate on the emitted very soft bremsstrahlung photons in order to evaluate the complete radiative corrections to the elastic lepton-proton scattering δ 2γ . This radiative correction has been evaluated in a model independent way using Heavy Baryon Chiral Perturbation Theory (χPT) to next-to-leading order (NLO) [74]. We find the observed differential cross-section to be dσ…”

Section: Radiative Corrections For Musementioning

confidence: 99%

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CFNS Ad-Hoc meeting on Radiative Corrections Whitepaper

Afanasev¹,

Jaseer²,

Akushevich³

et al. 2020

Preprint

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“…Particularly, a MUSE experiment is cur-rently taking data at PSI [15], and PRAD-II is in a planning stage at JLab [16]. In theory, an unified treatment of both chiral and radiative corrections to the low-energy elastic lepton-proton scattering processes has been performed in Heavy Baryon Chiral Perturbations Theory [17].…”

Section: Introductionmentioning

confidence: 99%

Charge-asymmetric correlations in elastic lepton- and antilepton-proton scattering from real photon emission

Afanasev¹,

Ilyichev²

2022

Preprint

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Observation of charge asymmetry by comparing electron and positron, or muon and anti-muon, scattering on a hadronic target presently serves as an experimental tool to study two-photon exchange effects. In addition to two-photon exchange, real photon emission also contributes to the charge asymmetry. We present a theoretical formalism, explicit expressions, and a numerical analysis of hard photon emission for the charge asymmetry in lepton-and antilepton-proton scattering. Different kinematic conditions are considered, namely, either fixed transferred momentum squared or a fixed electron scattering angle. The infrared divergence from real photon emission is treated by the Bardin-Shumeiko technique and canceled with the soft part of the two-photon exchange contribution extracted and calculated using Tsai approach. All final expressions are obtained beyond the ultrarelativistic approximation with respect to the lepton mass that allows to evaluate numerically of the considered effects not only for ultrarelativistic leptons (JLab) and but for moderately relativistic (MUSE) kinematics, too.

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Radiative and chiral corrections to elastic lepton-proton scattering in chiral perturbation theory

Cited by 10 publications

References 80 publications

Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory

Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory

CFNS Ad-Hoc meeting on Radiative Corrections Whitepaper

Charge-asymmetric correlations in elastic lepton- and antilepton-proton scattering from real photon emission

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