Parton content of the nucleon from distribution amplitudes and transition distribution amplitudes

Pasquini, B.; Pincetti, M.; Boffi, S.

doi:10.1103/physrevd.80.014017

Cited by 27 publications

(36 citation statements)

References 110 publications

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“…For the momentum-dependent part of the LCWF we adopt the phenomenological description with parameters fitted to hadronic structure constants from [76] which gave satisfactory results in previous works [56][57][58][59].…”

Section: T-odd Tmds In the Lccqmmentioning

confidence: 97%

“…On the basis of the one-gluon-exchange approximation formulated in the light-cone quantization formalism [54] the Sivers and Boer-Mulders were modeled in [53] using light-cone wave-functions which were previously applied with success to calculations of transversity, electroweak properties of the nucleon, generalized parton distributions, distribution amplitudes [55][56][57], and T-even leading-twist TMDs [58]. The results illustrate the relevance of different orbital angular momentum components of the nucleon light-cone wave function.…”

Section: Introductionmentioning

confidence: 99%

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Naive time-reversal odd phenomena in semi-inclusive deep-inelastic scattering from light-cone constituent quark models

Pasquini

Schweitzer

2011

Phys. Rev. D

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We present results for leading-twist azimuthal asymmetries in semi-inclusive lepton-nucleon deepinelastic scattering due to naively time-reversal odd transverse-momentum dependent parton distribution functions from the light-cone constituent quark model. We carefully discuss the range of applicability of the model, especially with regard to positivity constraints and evolution effects. We find good agreement with available experimental data from COMPASS and HERMES, and present predictions to be tested in forthcoming experiments at Jefferson Lab.

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Section: T-odd Tmds In the Lccqmmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Naive time-reversal odd phenomena in semi-inclusive deep-inelastic scattering from light-cone constituent quark models

Pasquini

Schweitzer

2011

Phys. Rev. D

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“…We will refer to this approach as the light-front constituent model (LFCM). The LFCM was successfully applied to describe many nucleon properties [51][52][53][54][55][56][57][58][59][60] including TMDs [61][62][63][64]. For the pion, the specific model we will adopt for the minimal Fock-space components of the LFWF has been originally proposed in Refs.…”

Section: Introductionmentioning

confidence: 99%

Pion transverse momentum dependent parton distributions in a light-front constituent approach, and the Boer-Mulders effect in the pion-induced Drell-Yan process

Pasquini

Schweitzer

2014

Phys. Rev. D

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At leading twist the transverse-momentum dependent parton distributions of the pion consist of two functions, the unpolarized f1,π(x, k 2 ⊥ ) and the Boer-Mulders function h ⊥ 1,π (x, k 2 ⊥ ). We study both functions within a light-front constituent model of the pion, comparing the results with different pion models and the corresponding nucleon distributions from a light-front constituent model. After evolution from the model scale to the relevant experimental scales, the results for the collinear pion valence parton distribution function f1,π(x) are in very good agreement with available parameterizations. Using the light-front constituent model results for the Boer-Mulders functions of the pion and nucleon, we calculate the coefficient ν in the angular distribution of Drell-Yan dileptons produced in pion-nucleus scattering, which is responsible for the violation of the Lam-Tung relation. We find a good agreement with data, and carefully discuss the range of applicability of our approach.

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“…Future detailed feasibility studies will require the use of a more sophisticated phenomenological model proposed for πN TDAs in [5] based on the spectral representation for baryon-to-meson TDAs in terms of quadruple distributions [48]. Another possibility is given by the calculations of πN TDAs within the light-cone quark model approach [49].…”

Section: Discussionmentioning

confidence: 99%

Experimental access to Transition Distribution Amplitudes with the P̄ANDA experiment at FAIR

et al. 2015

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Abstract. Baryon-to-meson Transition Distribution Amplitudes (TDAs) encoding valuable new information on hadron structure appear as building blocks in the collinear factorized description for several types of hard exclusive reactions. In this paper, we address the possibility of accessing nucleon-to-pion (πN ) TDAs frompp → e + e − π 0 reaction with the futurePANDA detector at the FAIR facility. At high centerof-mass energy and high invariant mass squared of the lepton pair q 2 , the amplitude of the signal channel pp → e + e − π 0 admits a QCD factorized description in terms of πN TDAs and nucleon Distribution Amplitudes (DAs) in the forward and backward kinematic regimes. Assuming the validity of this factorized description, we perform feasibility studies for measuringpp → e + e − π 0 with thePANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e.pp → π + π − π 0 were performed for the center-of-mass energy squared s = 5 GeV 2 and s = 10 GeV 2 , in the kinematic regions 3.0 < q 2 < 4.3 GeV 2 and 5 < q 2 < 9 GeV 2 , respectively, with a neutral pion scattered in the forward or backward cone | cos θ π 0 | > 0.5 in the proton-antiproton center-of-mass frame. Results of the simulation show that the particle identification capabilities of thePANDA detector will allow to achieve a background rejection factor of 5 · 10 7 (1 · 10 7 ) at low (high) q 2 for s = 5 GeV 2 , and of 1 · 10 8 (6 · 10 6 ) at low (high) q 2 for s = 10 GeV 2 , while keeping the signal reconstruction efficiency at around 40%. At both energies, a clean lepton signal can be reconstructed with the expected statistics corresponding to 2 fb −1 of integrated luminosity. The cross sections obtained from the simulations are used to show that a test of QCD collinear factorization can be done at the lowest order by measuring scaling laws and angular distributions. The future measurement of the signal channel cross section withPANDA will provide a new test of the perturbative QCD description of a novel class of hard exclusive reactions and will open the possibility of experimentally accessing πN TDAs.

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Parton content of the nucleon from distribution amplitudes and transition distribution amplitudes

Cited by 27 publications

References 110 publications

Naive time-reversal odd phenomena in semi-inclusive deep-inelastic scattering from light-cone constituent quark models

Naive time-reversal odd phenomena in semi-inclusive deep-inelastic scattering from light-cone constituent quark models

Pion transverse momentum dependent parton distributions in a light-front constituent approach, and the Boer-Mulders effect in the pion-induced Drell-Yan process

Experimental access to Transition Distribution Amplitudes with the P̄ANDA experiment at FAIR

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