Article
Astronomy & Astrophysics
Goran Duplancic, Saad Nabeebaccus, Kornelija Passek-Kumericki, Bernard Pire, Lech Szymanowski, Samuel Wallon
Summary: We extend our studies of a new class of 2 -> 3 exclusive processes by considering the exclusive photoproduction of a gamma rho pair. Our analysis covers the whole kinematical range from medium energies in fixed-target experiments to very large energies of colliders. We find that the obtained cross sections are sufficiently large for a dedicated experimental analysis to be performed, especially at JLab.
Article
Astronomy & Astrophysics
Hua-Xing Chen, Wei Chen, Shi-Lin Zhu
Summary: Based on evidence of odderon exchange observed by the D0 and TOTEM Collaborations, a QCD sum rule investigation suggests the existence of six lowest-lying three-gluon odderons with specific quantum numbers. To verify their existence, it is proposed to search for spin-3 odderons directly at LHC in their VVV and VVP decay channels.
Article
Astronomy & Astrophysics
Yoshikazu Hagiwara, Cheng Zhang, Jian Zhou, Ya-jin Zhou
Summary: In ultraperipheral heavy-ion collisions, a sizable cos 4 phi azimuthal asymmetry in exclusive dipion production near the p degrees resonance peak has been reported by the STAR collaboration. This asymmetry may be generated by both elliptic gluon Wigner distribution and final-state soft photon radiation. The observed asymmetry, underestimated by QED effects alone, may suggest nontrivial correlation in the quantum phase distribution of gluons.
Article
Physics, Particles & Fields
M. A. Braun
Summary: This study calculates the C-odd amplitude for the elastic proton-proton and proton-antiproton scattering due to the exchange of the QCD odderon. The found amplitude is very small and has almost no impact on the differential cross-sections at different energies.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Izabela Babiarz, Victor P. Goncalves, Wolfgang Schaefer, Antoni Szczurek
Summary: In this letter, the exclusive ηc production by γ*γ interactions in eA collisions is studied, and it is demonstrated that future experimental analysis of this process can improve the description of the ηctransition form factor. The distributions of rapidity, transverse momentum, and photon virtuality are estimated, considering the expected energy and target configurations at the EIC, EicC, and LHeC, as well as different predictions for the light-front wave function of the ηc meson. The results suggest that electron-ion colliders can provide supplementary data to those obtained in e-e+ colliders.
Article
Physics, Particles & Fields
T. Csorgo, T. Novak, R. Pasechnik, A. Ster, I. Szanyi
Summary: This study investigates the scaling properties of the differential cross section of elastic proton-proton and proton-antiproton collisions at high energies, suggesting evidence for an Odderon exchange at TeV energies. Additionally, a model-dependent evaluation of the domain of validity of the scaling and its violations is provided.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
A. Donnachie, P. Landshoff
Summary: It is found that the phase of an elastic scattering amplitude is closely related to its energy variation. A previous fit to pp and p(p)bar elastic scattering data from 13 to 13000 GeV is repeated, with better consideration of the high accuracy 13 TeV data. The conclusion remains that there is no evidence for the existence of an odderon in the small-t data.
Article
Astronomy & Astrophysics
Yoshikazu Hagiwara, Cheng Zhang, Jian Zhou, Ya-jin Zhou
Summary: We investigate exclusive pi(+)pi(-) pair production near the rho(0) resonance peak in ultraperipheral heavy ion collisions. At very low pair transverse momentum, the Coulomb nuclear interference amplitude leads to significant azimuthal asymmetries in cos phi and cos 3 phi, which can be utilized to restrict the phase of the dipole-nucleus scattering amplitude.
Article
Psychology, Biological
P. A. Hancock
Summary: In this study, the experimental data and results of an evaluation of the Maximal Adaptability Model were analyzed. The findings support the predictions of the model regarding stress insensitivity but question the validity of the standard inverted-U description of the relationship between stress and performance. The study provides valuable data for future evaluations of the model.
PHYSIOLOGY & BEHAVIOR
(2022)
Article
Computer Science, Artificial Intelligence
Kaiqiang Yu, Cheng Long, P. Deepak, Tanmoy Chakraborty
Summary: In this paper, we address the problem of cohesive subgraph discovery in bipartite graph mining, focusing on the $k$-biplex structure. We propose an efficient tree-based algorithm with advanced strategies and pruning techniques to solve the large maximal $k$-biplex enumeration problem. Experimental results demonstrate the superiority of our algorithm over existing approaches in terms of scalability and performance on both real and synthetic datasets.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Astronomy & Astrophysics
Yu Jia, Zhewan Mo, Jichen Pan, Jia-Yue Zhang
Summary: In this study, the photoproduction of various C-even heavy quarkonia, such as eta(c(b)) and chi(c(b)J) with J = 0, 1, 2, is investigated via one-photon exchange channel in ep collision. The results show that the photoproduction rates of eta(c) through this mechanism are comparable to that through the Odderon-initiated mechanism, even in the Regge limit. Future measurements in EIC and EicC are crucial to determine the dominant mechanism.
Article
Astronomy & Astrophysics
Adrian Dumitru, Heikki Maentysaari, Risto Paatelainen
Summary: This paper investigates the issue of the imaginary part of the nonforward eikonal scattering matrix for dipole-proton scattering at high energy, which is caused by a C-odd three-gluon exchange. Numerical estimates are presented for the perturbative odderon amplitude, considering the dipole size, impact parameter, relative azimuthal angle, and light-cone momentum cutoff x. The proton is approximated as yrqqqjqqqi thorn yrqqqgjqqqgi, where yrqqq represents a nonperturbative three-quark model wave function, and gluon emission is computed using light-cone perturbation theory. It is found that the odderon amplitude increases as x decreases from 0.1 to 0.01, and a reversal of this energy dependence is expected at even lower x, indicating the onset of universal small-x renormalization evolution.
Article
Operations Research & Management Science
Christian Bingane
Summary: This paper investigates the maximal perimeter and maximal width problem of convex small polygons, and presents a family of convex small n-gons where the perimeters and widths cannot be improved for large n. The paper also formulates the maximal perimeter problem as a nonlinear optimization problem involving trigonometric functions, and provides global optimal solutions for specific cases of n = 2(s) with 3 <= s <= 7.
JOURNAL OF GLOBAL OPTIMIZATION
(2022)
Article
Mathematics, Applied
Elman J. Ibrahimov, Saadat Ar. Jafarova, Rovshan A. Bandaliyev
Summary: In this paper, necessary and sufficient conditions for the boundedness of the fractional integral on G-Morrey space generated by Gegenbauer differential operator are established. A similar problem is also studied for the fractional maximal operator.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Physics, Particles & Fields
T. Csorgo, I. Szanyi
Summary: The study applies the unitarily extended Bialas-Bzdak model to describe the differential cross-section of elastic proton-proton and proton-antiproton collisions, finding significant differences between the two at different energies. The results provide statistically significant evidence for a crossing-odd component of the elastic scattering amplitude at at least the 7.08 sigma level.
EUROPEAN PHYSICAL JOURNAL C
(2021)
