Model-independent determination of the axial mass parameter in quasielastic antineutrino-nucleon scattering

Bhattacharya, Bhubanjyoti; Paz, Gil; Tropiano, A. J.

doi:10.1103/physrevd.92.113011

Cited by 27 publications

(29 citation statements)

References 37 publications

(111 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, from a theoretical point of view, it has been indicated that this ansatz is not a good choice, e.g. see [81,82]. For example, a recent analysis of G A [83], using conformal mapping or z-expansion, shows that the dipole ansatz systematically underestimates the uncertainty of AFF.…”

Section: Experimental Datamentioning

confidence: 99%

Nucleon axial form factor from generalized parton distributions

2019

View full text Add to dashboard Cite

It is well established that the nucleon form factors can be related to Generalized Parton Distributions (GPDs) through sum-rules. On the other hand, GPDs can be expressed in terms of Parton Distribution Functions (PDFs) according to Diehl's model. In this work, we use this model to calculate polarized GPDs for quarks ( Hq) using the available polarized PDFs obtained from the experimental data, and then study the axial form factor of nucleon. We determine parameters of the model using standard χ 2 analysis of experimental data. It is shown that some parameters should be readjusted, as compared to some previously reported values, to obtain better consistency between the theoretical predictions and experimental data. Moreover, we study in details the uncertainty of nucleon axial form factor due to various sources.

show abstract

Section: Experimental Datamentioning

confidence: 99%

Nucleon axial form factor from generalized parton distributions

2019

View full text Add to dashboard Cite

show abstract

“…Furthermore, modifications in the nuclear medium are also studied in Refs. [92][93][94][95][96][97].…”

Section: Introductionmentioning

confidence: 99%

Axial form factors of the octet baryons in a covariant quark model

Ramalho

Tsushima

2016

Phys. Rev. D

View full text Add to dashboard Cite

We study the weak interaction axial form factors of the octet baryons, within the covariant spectator quark model, focusing on the dependence of four-momentum transfer squared, Q 2 . In our model the axial form factors GA(Q 2 ) (axial-vector form factor) and GP (Q 2 ) (induced pseudoscalar form factor), are calculated based on the constituent quark axial form factors and the octet baryon wave functions. The quark axial current is parametrized by the two constituent quark form factors, the axial-vector form factor g q A (Q 2 ), and the induced pseudoscalar form factor g q P (Q 2 ). The baryon wave functions are composed of a dominant S-state and a P -state mixture for the relative angular momentum of the quarks. First, we study in detail the nucleon case. We assume that the quark axial-vector form factor g q A (Q 2 ) has the same function form as that of the quark electromagnetic isovector form factor. The remaining parameters of the model, the P -state mixture and the Q 2 -dependence of g q P (Q 2 ), are determined by a fit to the nucleon axial form factor data obtained by lattice QCD simulations with large pion masses. In this lattice QCD regime the meson cloud effects are small, and the physics associated with the valence quarks can be better calibrated. Once the valence quark model is calibrated, we extend the model to the physical regime, and use the low Q 2 experimental data to estimate the meson cloud contributions for GA(Q 2 ) and GP (Q 2 ). Using the calibrated quark axial form factors, and the generalization of the nucleon wave function for the other octet baryon members, we make predictions for all the possible weak interaction axial form factors GA(Q 2 ) and GP (Q 2 ) of the octet baryons. The results are compared with the corresponding experimental data for GA(0), and with the estimates of baryon-meson models based on SU (6) symmetry.

show abstract

“…[16,17], and several applications are found in Refs. [15,[18][19][20]. Related formalism and applications may be found in [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Form Factor Nonlinearitiesmentioning

confidence: 99%

“…19 At the nucleon-level, the basic signal process for neutrino detection is charged-current quasielastic scattering, ν � n → � − p. Figure 14 illustrates that with proper treatment of form factor shape, the nucleonlevel uncertainty on the cross section is an order of magnitude larger than previously thought. 20 This complicates the program of constraining nuclear effects from measurement: for example, in Fig.14, 19 Another recent application is to the study of photon initiated processes at the LHC [93]. 20 Reference [95] 2 .…”

Section: Nucleon Form Factors For Neutrinos and Other Processesmentioning

confidence: 99%

“…20 This complicates the program of constraining nuclear effects from measurement: for example, in Fig.14, 19 Another recent application is to the study of photon initiated processes at the LHC [93]. 20 Reference [95] 2 . This small uncertainty arises from a dipole shape assumption that was applied to neutrino scattering and pion electroproduction data [96].…”

Section: Nucleon Form Factors For Neutrinos and Other Processesmentioning

confidence: 99%

See 1 more Smart Citation

Review of experimental and theoretical status of the proton radius puzzle

Hill

2017

EPJ Web Conf.

View full text Add to dashboard Cite

Abstract. The discrepancy between the measured Lamb shift in muonic hydrogen and expectations from electron-proton scattering and regular hydrogen spectroscopy has become known as the proton radius puzzle, whose most "mundane" resolution requires a > 5σ shift in the value of the fundamental Rydberg constant. I briefly review the status of spectroscopic and scattering measurements, recent theoretical developments, and implications for fundamental physics.

show abstract

Model-independent determination of the axial mass parameter in quasielastic antineutrino-nucleon scattering

Cited by 27 publications

References 37 publications

Nucleon axial form factor from generalized parton distributions

Nucleon axial form factor from generalized parton distributions

Axial form factors of the octet baryons in a covariant quark model

Review of experimental and theoretical status of the proton radius puzzle

Contact Info

Product

Resources

About