Article
Physics, Particles & Fields
P. Abolhadi, M. M. Yazdanpanah, H. Nematollahi
Summary: We investigate the unpolarized transverse momentum dependent (TMD) structure of light mesons at low Q^2 scales in the nonperturbative region of quantum chromodynamics (QCD). We calculate the unpolarized TMD valence quark distribution functions of pion and kaon using the covariant parton model, taking into account the flavor-dependent covariant momentum distribution of quarks. We apply a statistical model to this momentum distribution for the first time and consider the quarks to have mass. The results of the TMD valence distributions of light mesons exhibit convenient general properties. We also obtain the integrated valence quark distributions of pion and kaon and compare our results with those of other models.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
P. Kroll, K. Passek-Kumericki
Summary: We investigate the exclusive electroproduction of N-A++ using the handbag approach, where the helicity amplitudes factorize into generalized parton distributions (GPDs) and hard partonic subprocesses. We define the p - A transversity GPDs and obtain the helicity nonflip GPDs from the literature. By utilizing large-NC results, we relate some of the p - A GPDs to the proton-proton ones and neglect all other GPDs for numerical estimates. Quark transverse momenta and Sudakov suppressions are taken into account in the calculation of twist-2 and twist-3 subprocess amplitudes. The partial cross sections for y*p -> N-A++ are predicted in the large-NC limit.
Article
Physics, Particles & Fields
Zhi-Qing Zhang, Hsiang-nan Li
Summary: The paper extends the threshold resummation for large logarithms In x in exclusive B meson decays to NLL accuracy. It is shown that NLL resummation has a stronger suppression effect in the end-point region with x close to 0 compared to LL resummation, improving perturbative analyses. Revisiting B -> K pi decays under NLL resummation in perturbative QCD approach, it is found to induce up to 20% variation in direct CP asymmetries relative to LL results, with a maximum theoretical uncertainty of 10% due to avoiding Landau singularity in the inverse Mellin transformation.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
C. Lehr, F. Wamers, F. Aksouh, Yu Aksyutina, H. Alvarez-Pol, L. Atar, T. Aumann, S. Beceiro-Novo, C. A. Bertulani, K. Boretzky, M. J. G. Borge, C. Caesar, M. Chartier, A. Chatillon, L. Chulkov, D. Cortina-Gil, P. Diaz Fernandez, H. Emling, O. Ershova, L. M. Fraile, H. O. U. Fynbo, D. Galaviz, H. Geissel, M. Heil, M. Heine, D. H. H. Hoffmann, M. Holl, H. T. Johansson, B. Jonson, C. Karagiannis, O. A. Kiselev, J. Kratz, R. Kulessa, N. Kurz, C. Langer, M. Lantz, T. Le Bleis, R. Lemmon, Yu A. Litvinov, B. Loeher, K. Mahata, J. Marganiec-Galazka, C. Muentz, T. Nilsson, C. Nociforo, W. Ott, V Panin, S. Paschalis, A. Perea, R. Plag, R. Reifarth, A. Richter, K. Riisager, C. Rodriguez-Tajes, D. Rossi, D. Savran, H. Scheit, G. Schrieder, P. Schrock, H. Simon, J. Stroth, K. Suemmerer, O. Tengblad, H. Weick, C. Wimmer
Summary: The proton drip-line nucleus Ne-17 has been experimentally investigated to determine its two-proton halo character. The experimental results suggest that Ne-17 may only have a relatively modest halo character. The quantitative consistency between the theoretical calculations and experimental data, supported by the independence in distinguishing different knockout processes, provides valuable information on the contributions of valence-proton knockout and knockout from the O-15 core.
Article
Physics, Nuclear
Y. Tian, R. W. Gothe, V. Mokeev, G. Hollis, M. J. Amaryan, W. R. Armstrong, H. Atac, H. Avakian, L. Barion, M. Battaglieri, I Bedlinskiy, B. Benkel, F. Benmokhtar, A. Bianconi, L. Biondo, A. Biselli, F. Bossu, S. Boiarinov, M. Bondi, K. T. Brinkmann, W. J. Briscoe, S. Bueltmann, D. Bulumulla, V. D. Burkert, R. Capobianco, D. S. Carman, J. C. Carvajal, A. Celentano, V Chesnokov, T. Chetry, G. Ciullo, G. Clash, P. L. Cole, M. Contalbrigo, G. Costantini, A. D'Angelo, N. Dashyan, R. De Vita, M. Defurne, A. Deur, S. Diehl, C. Djalali, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, L. Elouadrhiri, P. Eugenio, S. Fegan, A. Filippi, G. Gavalian, G. P. Gilfoyle, F. X. Girod, A. A. Golubenko, G. Gosta, K. Griffioen, M. Guidal, H. Hakobyan, M. Hattawy, T. B. Hayward, A. Hobart, M. Holtrop, Y. Ilieva, D. G. Ireland, E. L. Isupov, D. Jenkins, H. S. Jo, K. Joo, S. Joosten, D. Keller, A. Khanal, M. Khandaker, A. Kim, W. Kim, F. J. Klein, A. Kripko, V Kubarovsky, V Lagerquist, L. Lanza, M. Leali, P. Lenisa, K. Livingston, I. J. D. MacGregor, D. Marchand, L. Marsicano, V Mascagna, B. McKinnon, S. Migliorati, T. Mineeva, M. Mirazita, C. Munoz Camacho, P. Nadel-Turonski, P. Naidoo, K. Neupane, J. Newton, S. Niccolai, M. Nicol, G. Niculescu, M. Osipenko, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan, K. Park, E. Pasyuk, S. J. Paul, W. Phelps, N. Pilleux, D. Pocanic, O. Pogorelko, J. Poudel, J. W. Price, Y. Prok, T. Reed, M. Ripani, J. Ritman, A. Rizzo, G. Rosner, F. Sabatie, C. Salgado, S. Schadmand, A. Schmidt, R. A. Schumacher, E. Shirokov, U. Shrestha, P. Simmerling, D. Sokhan, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, R. Tyson, M. Ungaro, L. Venturelli, H. Voskanyan, E. Voutier, D. P. Watts, K. Wei, X. Wei, M. H. Wood, B. Yale, N. Zachariou, J. Zhang
Summary: New results for exclusive and quasifree cross sections off bound neutrons in deuterium have been obtained. The analysis of experimental data provides valuable input for the extraction of Q(2) evolution of previously unavailable n -> N* electroexcitation amplitudes and improvement of neutrino scattering models.
Article
Physics, Multidisciplinary
Lei Wang, Qinglin Niu, Jinjuan Zhang, Jian Liu, Zhongzhou Ren
Summary: In this study, the scaling analyses were applied to study the inclusive electron scattering and a modified scaling function was proposed to investigate the high-momentum part of the momentum distributions. The effects of nucleon-nucleon short-range correlation on the cross sections were systematically explored using the proposed scaling function and the strength of the correlation was extracted from experimental data. This research offers a new method to investigate nucleon momentum distributions and nucleon-nucleon short-range correlation effects in nuclei.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Physics, Nuclear
S. V. Goloskokov, Ya-Ping Xie, Xurong Chen
Summary: This study employs the handbag approach based on Generalized Parton Distribution (GPDs) factorization to analyze exclusive pi(0) electroproduction. It considers the leading-twist contribution and transversity effects, finding that the transversity GPDs H-T and E(T) are crucial in describing the pi(0) cross section. Predictions are provided for the energy range of the future Electron-Ion Collider of China (EicC), showing that the observed transversity dominance at low energies remains valid up to the EicC energy range.
Article
Astronomy & Astrophysics
Miguel G. Echevarria, Patricia A. Gutierrez Garcia, Ignazio Scimemi
Summary: Using the Soft Collinear Effective Theory, we derive the factorization of the differential cross section for the exclusive double Drell-Yan process for small transverse momenta. The factorization allows for a rigorous definition of the generalized transverse momentum dependent distributions (GTMDs), and involves a perturbatively calculable hard factor, GTMDs, and light-cone wave functions (LCWFs). We find that the hard factor can be obtained from single inclusive Drell-Yan production, enabling the resummation of logarithms at high orders in QCD. We also discuss the evolution of the GTMDs and LCWFs.
Article
Astronomy & Astrophysics
A. Luchinsky
Summary: Theoretical analysis of three exclusive decays, Bc -> psi(('')) + R, has been conducted using the factorization method and resonance approximation. Analytical expressions for the required amplitudes and distributions over interesting mass combinations have been obtained. The presented results are valuable for comparison with experimental data and improving the understanding of heavy quarkonia nature.
Article
Astronomy & Astrophysics
Heikki Mantysaari, Jani Penttala
Summary: In this study, exclusive production of light vector mesons in deep inelastic scattering is calculated using the dipole picture at high photon virtuality. The expression obtained is divergence-free and suitable for numerical evaluations. Higher-order corrections are numerically significant, but can be mostly accounted for by nonperturbative fit parameters.
Article
Multidisciplinary Sciences
Xiaohui Liu, Hongxi Xing
Summary: We re-evaluate the jet probes of nucleon spin and flavor structures and find that the conventionally assumed vanishing time-reversal odd (T-odd) component of a jet can actually survive due to non-perturbative effects. This discovery reveals novel jet phenomena that can unlock access to previously inaccessible spin structures of the nucleon. Examples include the coupling of the T-odd constituent to proton transversity at the Electron Ion Collider (EIC) and the generation of anisotropy in jet production in ������+������- annihilations. We anticipate broad applications of the T-odd contribution of jets in high energy nuclear physics.
FUNDAMENTAL RESEARCH
(2023)
Article
Nuclear Science & Technology
Long Zhou, Si-Min Wang, De-Qing Fang, Yu-Gang Ma
Summary: Rare isotope beam facilities have provided unique data for studying nuclides far from the beta-stability line. Two-proton (2p) radioactivity, a rare decay mode in highly proton-rich isotopes, has attracted significant research attention. This review presents recent experimental and theoretical progress on 2p decay, including innovations in measuring nucleon-nucleon correlations and developments in connecting structural aspects with decay properties.
NUCLEAR SCIENCE AND TECHNIQUES
(2022)
Article
Physics, Nuclear
S. K. Saha, D. R. Entem, R. Machleidt, Y. Nosyk
Summary: We present local, position-space chiral NN potentials through four orders of chiral effective field theory. Our potentials accurately reproduce the NN data below 190 MeV and show substantial agreement with the phenomenological AV18 potential in the intermediate range. These potentials provide a solid basis for systematic ab initio calculations of nuclear structure and reactions, and may help solve outstanding problems in microscopic nuclear structure.
Article
Physics, Nuclear
B. N. Joshi, Arun K. Jain
Summary: In this study, the effective t-matrix for the free nucleon-nucleon interaction was evaluated using a realistic nucleon-nucleon interaction. The resulting t-matrix not only depends on the separation, spin, and isospin of the interacting nucleons, but also on the multipole moment. These findings are expected to have a significant impact on the finite range predictions of reactions like (p,2p), (p,pn), and (n,2n).
Article
Astronomy & Astrophysics
Lopamudra Nayak, P. C. Dash, Susmita Kar, N. Barik
Summary: We study the decays of Bc mesons and predict the branching fractions for a set of exclusive nonleptonic Bc decays. Our predictions are in reasonable agreement with other model predictions and can be measured at LHCb in the near future. The results provide important insights into the properties of Bc mesons and have significant implications for experiments.
Article
Astronomy & Astrophysics
Sam Stevens, Jan Ryckebusch, Wim Cosyn, Andreas Waets
Article
Multidisciplinary Sciences
Kevin Hoefman, Aaron Bramson, Koen Schoors, Jan Ryckebusch
Article
Astronomy & Astrophysics
Jan Ryckebusch, Wim Cosyn, Sam Stevens, Corneel Casert, Jannes Nys
Article
Physics, Particles & Fields
Wim Cosyn, Sabrina Cotogno, Adam Freese, Cedric Lorce
EUROPEAN PHYSICAL JOURNAL C
(2019)
Review
Physics, Nuclear
I Cloet, R. Dupre, S. Riordan, W. Armstrong, J. Arrington, W. Cosyn, N. Fomin, A. Freese, S. Fucini, D. Gaskell, C. E. Keppel, G. A. Miller, E. Pace, S. Platchkov, P. E. Reimer, S. Scopetta, A. W. Thomas, P. Zurita
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2019)
Article
Astronomy & Astrophysics
W. Cosyn, C. Weiss
Article
Multidisciplinary Sciences
Andres M. Belaza, Jan Ryckebusch, Koen Schoors, Luis E. C. Rocha, Benjamin Vandermarliere
Article
Astronomy & Astrophysics
W. Cosyn, B. Pire, L. Szymanowski
Article
Physics, Nuclear
Jan Ryckebusch, Wim Cosyn, Tom Vieijra, Corneel Casert
Article
Astronomy & Astrophysics
Adam J. Freese, Wim Cosyn, Misak M. Sargsian
Article
Astronomy & Astrophysics
W. Cosyn, A. Freese, B. Pire
Article
Astronomy & Astrophysics
W. Cosyn, B. Pire
