Article
Astronomy & Astrophysics
Claude Bourrely, Wen-Chen Chang, Jen-Chieh Peng
Summary: This article presents a new analysis method using the statistical model to extract pion parton distribution functions (PDFs), and obtains a new set of pion PDFs through a combined fit to Drell-Yan data and J/Psi production data. This study is of great significance for better determining the gluon distribution inside the pion.
Article
Astronomy & Astrophysics
Dmitry S. Ageev
Summary: This paper combines quantum chaos and quark-gluon plasma in holographic correspondence. It establishes a relationship between the drag force experienced by a charge carrier moving through a thermal medium and the butterfly velocity. The study suggests that the butterfly velocity can be experimentally reconstructed from simple observables in systems like quark-gluon plasma.
Article
Physics, Multidisciplinary
Alexander Huss, Aleksi Kurkela, Aleksas Mazeliauskas, Risto Paatelainen, Wilke van der Schee, Urs Achim Wiedemann
Summary: In this study, oxygen-oxygen collisions at the LHC were used to investigate parton energy loss and it was found that measuring charged hadron spectra can distinguish the expected signal from the baseline.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Joao Barata, Andrey V. Sadofyev, Xin-Nian Wang
Summary: We study gradient corrections to the transport equation for energetic light partons in dense QCD environments. In the diffusion limit, the transport dynamics is solely controlled by small-angle elastic scatterings, leading to transverse momentum broadening with respect to the parton's initial direction. Such a parton propagation is usually considered in the limit of transversely homogeneous matter.
Article
Astronomy & Astrophysics
Tianyin Li, Xingyu Guo, Wai Kin Lai, Xiaohui Liu, Enke Wang, Hongxi Xing, Dan-Bo Zhang, Shi-Liang Zhu
Summary: We propose a systematic quantum algorithm for studying parton distribution functions and demonstrate its application in the 1-dimensional Nambu-JonaLasinio model. The proposed algorithm is validated by its consistency with traditional methods and qualitative agreement with QCD PDFs. This research suggests promising prospects for calculating QCD PDFs on current and near-term quantum devices.
Article
Multidisciplinary Sciences
B. Behzadmoghaddam, M. Radin, S. Bayegan
Summary: In this paper, the chiral effective field theory is used to study the spin singlet channel S-1(0) of proton-proton scattering, adopting a new suggested power counting. The pp zero scattering amplitude is reproduced by including one pion exchange at leading order (LO) and the Coulomb interaction between protons at next-to-leading order (NLO). This provides a systematic improvement up to NLO compared to the result obtained from the Nijm93 potential model.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Particles & Fields
Souvik Priyam Adhya, Carlos A. Salgado, Martin Spousta, Konrad Tywoniuk
Summary: Going beyond simplified gluonic cascades, this study introduces both gluon and quark degrees of freedom for partonic cascades within the medium. Numerical solutions are obtained for the coupled evolution equations, considering different types of media, to obtain medium-modified parton spectra for quark and gluon initiated jets. Using these results, inclusive jet R-AA is calculated and the rapidity and path-length dependence are examined. Sensitivity analysis is performed on observables including nuclear modification of parton distribution functions, plasma-like emissions, and the onset of quenching. All calculations are compared with recent measurements.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
A. Papadopoulou, A. Ashkenazi, S. Gardiner, M. Betancourt, S. Dytman, L. B. Weinstein, E. Piasetzky, F. Hauenstein, M. Khachatryan, S. Dolan, G. D. Megias, O. Hen
Summary: Testing neutrino event generators using high-precision inclusive electron-scattering data overcomes experimental difficulties and provides adequate description of data in the QE- and MEC-dominated lower energy transfer regime, especially when using the SuSAv2 models. However, higher energy transfer interactions, dominated by resonance production, are still not well modeled by e-GENIE.
Article
Physics, Multidisciplinary
Ajit C. Balram, Zhao Liu, Andrey Gromov, Zlatko Papic
Summary: This paper argues that some high-energy states in the fractional quantum Hall (FQH) spectra require a different description based on parton quasiparticles, through numerical simulations and effective field theory. The study shows that Jain states at certain filling factors support two kinds of collective modes, including a high-energy collective mode interpreted as the Girvin-MacDonald-Platzman (GMP) mode of partons. Observable signatures of the parton mode in dynamics following a geometric quench are elucidated. A microscopic wave function for the parton mode is constructed and its variational energy is shown to agree with exact diagonalization. The field theory of the Jain states is derived using the parton construction, and the previously proposed effective theories are shown to be consistent with their approach. These results suggest that partons are real quasiparticles, observable only at sufficiently high energies, in a manner reminiscent of quarks.
Article
Physics, Nuclear
H. Kamada, M. Kohno, K. Miyagawa
Summary: Faddeev calculations with the incorporation of a 2 pi-exchange Lambda NN three-baryon force are performed to determine the separation energy of hypertriton, H-3(A). Repulsive contributions of the three-baryon force, on the order of 20 keV, are found depending on the NN interactions used. This effect is significant compared to the small separation energy of H-3(A).
Article
Physics, Multidisciplinary
X. Li, M. W. Ahmed, A. Banu, C. Bartram, B. Crowe, E. J. Downie, M. Emamian, G. Feldman, H. Gao, D. Godagama, H. W. Griesshammer, C. R. Howell, H. J. Karwowski, D. P. Kendellen, M. A. Kovash, K. K. H. Leung, D. M. Markoff, J. A. McGovern, S. Mikhailov, R. E. Pywell, M. H. Sikora, J. A. Silano, R. S. Sosa, M. C. Spraker, G. Swift, P. Wallace, H. R. Weller, C. S. Whisnant, Y. K. Wu, Z. W. Zhao
Summary: Differential cross sections for Compton scattering from the proton were measured using quasimonoenergetic and polarized photon beams. The results were used to extract the electromagnetic dipole polarizabilities of the proton within the chiral effective field theory framework.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Particles & Fields
Rabah Abdul Khalek, Rhorry Gauld, Tommaso Giani, Emanuele R. Nocera, Tanjona R. Rabemananjara, Juan Rojo
Summary: This paper presents an updated determination of nuclear parton distributions (nPDFs) through a global NLO QCD analysis of hard processes. It takes into account data from fixed-target lepton-nucleus and proton-nucleus experiments as well as collider proton-nucleus experiments. The constraints from various measurements are considered for the first time in a global nPDF analysis and applied to both the nuclear PDFs and the free-proton PDF baseline. The results show evidence of nuclear-induced modifications to the partonic structure of heavy nuclei and have important implications for ongoing and future experimental programs.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Nuclear
Sigtryggur Hauksson, Sangyong Jeon, Charles Gale
Summary: This paper analyzes the anisotropy of the quark-gluon plasma produced in heavy-ion collisions and its impact on the jet-medium interaction, focusing on the transverse momentum broadening of a jet parton interacting with soft gluons in an anisotropic plasma. The findings show that due to enhanced medium screening, there is a significant reduction in transverse broadening at low and intermediate momenta.
Article
Astronomy & Astrophysics
Ahmad Jafar Arifi, Daiki Suenaga, Atsushi Hosaka
Summary: This study investigates relativistic corrections of an order 1/m(2) in heavy baryon decays, finding that these corrections significantly improve decay properties by increasing decay widths and explaining a phenomenological suppression of the quark axial-vector coupling constant g(A)(q) in Σ(c)(2455) and Σ(c)(2520) decays.
Article
Physics, Particles & Fields
B. G. Zakharov
Summary: The study finds that the radiative contribution to p⊥ broadening of fast partons in an expanding quark-gluon plasma may be negative and comparable in absolute value with the non-radiative contribution in AA collisions at RHIC and LHC. Additionally, it is discovered that the expansion of the QGP enhances the radiative suppression of p⊥ broadening compared to a static medium.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Review
Physics, Nuclear
Emilien Chapon, David D'Enterria, Bertrand Ducloue, Miguel G. Echevarria, Pol-Bernard Gossiaux, Vato Kartvelishvili, Tomas Kasemets, Jean-Philippe Lansberg, Ronan McNulty, Darren D. Price, Hua-Sheng Shao, Charlotte Van Hulse, Michael Winn, Jaroslav Adam, Liupan An, Denys Yen Arrebato Villar, Shohini Bhattacharya, Francesco G. Celiberto, Cvetan Cheshkov, Umberto D'Alesio, Cesar da Silva, Elena G. Ferreiro, Chris A. Flett, Carlo Flore, Maria Vittoria Garzelli, Jonathan Gaunt, Jibo He, Yiannis Makris, Cyrille Marquet, Laure Massacrier, Thomas Mehen, Cedric Mezrag, Luca Micheletti, Riccardo Nagar, Maxim A. Nefedov, Melih A. Ozcelik, Biswarup Paul, Cristian Pisano, Jian-Wei Qiu, Sangem Rajesh, Matteo Rinaldi, Florent Scarpa, Maddie Smith, Pieter Taels, Amy Tee, Oleg Teryaev, Ivan Vitev, Kazuhiro Watanabe, Nodoka Yamanaka, Xiaojun Yao, Yanxi Zhang
Summary: The prospects for quarkonium-production studies in the upcoming high luminosity phases of the CERN Large Hadron Collider operation after 2021 are reviewed, with a focus on current issues, potential future studies, and the utilization of huge data samples. The investigations include various aspects such as quarkonia constraints on PDFs and parton dynamics, gluon Sivers effect, properties of quark-gluon plasma, and double and triple parton scatterings.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2022)
Article
Physics, Nuclear
Z. -F. Cui, M. Ding, J. M. Morgado, K. Raya, D. Binosi, L. Chang, J. Papavassiliou, C. D. Roberts, J. Rodriguez-Quintero, S. M. Schmidt
Summary: The analysis of the pion valence-quark distribution function predicts that its behavior at x approximately equal to 1 follows the model of (1 - x)(β(σ)), taking into account the pion wave function prescribed by QCD. However, the empirical status of this behavior remains uncertain due to disagreements in fitting existing data. Further experimental data is needed to reach a final conclusion.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Astronomy & Astrophysics
Zhao-Qian Yao, Daniele Binosi, Zhu-Fang Cui, Craig D. Roberts
Summary: Continuum Schwinger function methods are used to predict transition form factors and branching fractions in the strong-interaction bound-state problem. The results agree with available data and provide benchmarks for unmeasured form factors. The study also predicts values for V-cs vertical bar and branching fraction ratios, which can be used to test lepton flavour universality. Quantitative comparisons are made with recent experimental measurements, emphasizing the importance of further refinements.
Article
Physics, Multidisciplinary
Zhu-Fang Cui, Fei Gao, Daniele Binosi, Lei Chang, Craig D. Roberts, Sebastian M. Schmidt
Summary: This study investigates the ratio of structure functions between proton and neutron using precise data and a robust method, leading to a model-independent result. The consistency challenge raised by this result sheds light on the description of proton structure.
CHINESE PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Daniele Binosi
Summary: Emergent Hadron Mass (EHM) is a mechanism that explains the masses of hadrons and is intimately connected to their origin or confinement. EHM has become a key research focus for understanding strong interactions, utilizing Dyson-Schwinger equations for investigation.
Article
Physics, Multidisciplinary
Jose Manuel Morgado Chavez, Valerio Bertone, Feliciano De Soto Borrero, Maxime Defurne, Cedric Mezrag, Herve Moutarde, Jose Rodriguez-Quintero, Jorge Segovia
Summary: This study presents the first systematic feasibility analysis of accessing the generalized parton distributions (GPDs) of the pion at an electron-ion collider using deeply virtual Compton scattering. The interference between quarks and gluons is found to be destructive, leading to modulation of the expected event rate. The event rate is maximized when the parton content is generated through radiation from valence dressed quarks. Furthermore, gluons are observed to induce a sign inversion for the beam-spin asymmetry, providing a clear signal for identifying the regime of gluon dominance.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Nuclear
Zhu-Fang Cui, Daniele Binosi, Craig D. Roberts, Sebastian M. Schmidt
Summary: Radii are simple Poincare-invariant properties associated with hadrons and light nuclei. Recent measurements and analyses have shown uncertainties and imprecisions in the radii of the proton, pion, kaon, and deuteron. The statistical Schlessinger point method (SPM), independent of practitioner-induced bias, provides an objective expression of the information contained in any data and is applicable to diverse systems and observables.
Article
Astronomy & Astrophysics
Ya Lu, Lei Chang, Khepani Raya, Craig D. Roberts, Jose Rodriguez-Quintero
Summary: This study uses consistent determination of valence distribution functions (DFs) for proton and pion at the same hadron scale, and presents a unified prediction for all DFs including valence, glue, and four-flavour-separated sea. The results show that while identifiable parton classes carry the same hadron light-front momentum fractions for both proton and pion at any scale, the behavior of DFs is strongly dependent on the hadron.
Article
Astronomy & Astrophysics
F. Pinto-Gomez, F. De Soto, M. N. Ferreira, J. Papavassiliou, J. Rodriguez-Quintero
Summary: We present new results for the three-gluon vertex obtained from a large-scale lattice simulation in the Landau gauge. The simulation evaluates the transversely projected vertex using a special tensorial basis, with form factors parametrized in terms of Bose-symmetric variables. Interestingly, the form factors primarily depend on a single kinematic variable, the sum of the squares of the three incoming four-momenta. This property, known as planar degeneracy, allows for a simplified and compact description of the data, suitable for future numerical applications. Confirming this property through a detailed study of specific configurations, we find that a semi-perturbative analysis accurately reproduces the lattice findings when a gluon mass is included to eliminate spurious divergences. (c) 2023 Published by Elsevier B.V. This is an open access article under the CC BY license (http:// creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.
Article
Physics, Multidisciplinary
Y. -Z Xu, K. Raya, Z. -F Cui, C. D. Roberts, J. Rodriguez-Quintero
Summary: Ensembles of model-independent representations of the pion generalized parton distribution (GPD) are developed using existing pion+nucleus Drell-Yan and electron+pion scattering data. This leads to a data-driven prediction for the pion mass distribution form factor, ?2p.
CHINESE PHYSICS LETTERS
(2023)
Article
Astronomy & Astrophysics
Daniele Binosi, Alessandro Pilloni, Ralf-Arno Tripolt
Summary: In this study, a model-independent reconstruction method is applied to experimental data to identify complex poles of overlapping resonances. The algorithm utilizes the Schlessinger Point Method and interpolates data points using a continued-fraction expression. The statistical uncertainties of experimental data are propagated with resampling. The feasibility of the method is demonstrated by applying it to the S-wave J/ψ -> γg0g0 decay, where the f0(1500), f0(1710), and f0(2020) scalar states are identified from BESIII data. The results are in reasonable agreement with recent studies, indicating the potential of the proposed method as a model-independent alternative for determining resonance poles solely based on available experimental data.
Article
Astronomy & Astrophysics
A. C. Aguilar, F. De Soto, M. N. Ferreira, J. Papavassiliou, F. Pinto-Gomez, C. D. Roberts, J. Rodriguez-Quintero
Summary: Continuum and lattice analyses have discovered a mass-scale in the gluon two-point Schwinger function, indicating the presence of a Schwinger mechanism for gauge boson mass generation in quantum chromodynamics (QCD). By using numerical simulations of lattice-regularised QCD, the researchers established with high confidence the existence of a dynamically-generated, massless, colour-carrying, scalar gluon+gluon correlation, confirming the conjectured origin of the gluon mass scale.
Article
Astronomy & Astrophysics
Zhu-Fang Cui, Daniele Binosi, Craig D. Roberts, Sebastian M. Schmidt, D. N. Triantafyllopoulos
Summary: Theory suggests that the t-channel exchange of odderon may generate differences between pp and pp over bar cross-sections. Through robust comparisons using a mathematical approach, we find significant differences between pp and pp over bar elastic differential cross-sections. Combining these results with other experiment-theory comparisons, we obtain a significant signal for the existence of odderon at the (4.0 - 5.2)sigma level.
Article
Physics, Multidisciplinary
Pei-Lin Yin, Yin-Zhen Xu, Zhu-Fang Cui, Craig D. Roberts, Jose Rodriguez-Quintero
Summary: This article introduces an algebraic scheme that predicts all PDFs of a hadron at any higher scale, using a given hadron's valence parton PDFs. Furthermore, it presents a model-independent identity that relates the strength of the proton's gluon helicity PDF to other polarized quark PDFs and valence quark momentum fraction.
CHINESE PHYSICS LETTERS
(2023)
Article
Astronomy & Astrophysics
B. Almeida-Zamora, J. J. Cobos-Martinez, A. Bashir, K. Raya, J. Rodriguez-Quintero, J. Segovia
Summary: Inspired by a recent algebraic model, this study extends the model to the case of vector mesons, providing a description of their internal structure. By calculating the leading-twist light-front wave functions and their connection with parton distribution amplitudes, the wave functions of the mesons are obtained. Some interesting results include the algebraic derivation of transverse light-front wave functions but the need for an intermediate step for longitudinal wave functions, differences observed between light and heavy vector mesons, and the x and p(perpendicular to)^(2) dependence of the wave functions.
