scholarly journals Probing charmonium-like XYZ states in hadron–hadron ultraperipheral collisions and electron–proton scattering

2021 ◽  
Vol 81 (8) ◽  
Author(s):  
Ya-Ping Xie ◽  
Xiao-Yun Wang ◽  
Xurong Chen
Keyword(s):  
Cross Sections ◽  
Lagrangian Method ◽  
Proton Scattering ◽  
Scattering Process ◽  
Total Cross Sections ◽  
Exclusive Production ◽  
Effective Lagrangian ◽  
The Future ◽  
Rapidity Distributions

AbstractExclusive production of charmonium-like XYZ states in hadron–hadron ultraperipheral collisions (UPCs) and electron–proton scattering are studied employing the effective Lagrangian method. Total cross sections and rapidity distributions of charmonium-like XYZ states are obtained in hadron–hadron UPCs and the electron–proton scattering process. These predictions can be applied to estimate the observed event number of exclusive charmonium-like XYZ states in hadron–hadron UPCs and electron–proton scattering. The results indicate that it is significant to search X(3872) and $$Z^+_c(3900)$$ Z c + ( 3900 ) in pA UPCs, and the Electron–Ion Collider in China will be an advantageous platform to observe XYZ states in the future.

scholarly journals On Laser-Modified Rutherford Scattering

Atoms ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 40
Author(s):  
Sergey A. Zaytsev ◽  
Alexander S. Zaytsev ◽  
Lorenzo U. Ancarani ◽  
Konstantin A. Kouzakov
Keyword(s):  
Charged Particle ◽  
Cross Section ◽  
Cross Sections ◽  
Laser Field ◽  
Polarization Vector ◽  
Proton Scattering ◽  
Particle Scattering ◽  
Scattering Process ◽  
Analytical Approximations ◽  
Rutherford Scattering

We present a theoretical analysis of a charged-particle scattering by a Coulomb potential in the presence of laser radiation. The effect of a laser field is studied using our recently developed nonperturbative parabolic quasi-Sturmian approach for solving the system of coupled Lippmann–Schwinger–Floquet equations in the Kramers–Henneberger frame. We calculate the ratio of multiphoton differential cross sections to the Rutherford cross section in the case of a laser-assisted electron-proton scattering process. Our results are compared with predictions of the Bunkin–Fedorov, Kroll–Watson, and Coulomb–Volkov analytical approximations: marked discrepancies are found for different net numbers of exchanged photons and different orientations of the laser-field polarization vector. Our findings clearly demonstrate deficiencies of those well-known approximations for describing laser-modified Rutherford scattering processes.

scholarly journals The role of N*(2120) nucleon resonance in KΛ(1520) photon and hadronic productions

2014 ◽  
Vol 29 ◽  
pp. 1460244
Author(s):  
Ju-Jun Xie ◽  
En Wang ◽  
Bo-Chao Liu ◽  
J. Nieves
Keyword(s):  
Experimental Data ◽  
Invariant Mass ◽  
Cross Sections ◽  
Dalitz Plot ◽  
Total Cross Sections ◽  
Effective Lagrangian ◽  
Hadronic Production ◽  
Current Experimental Data ◽  
Theoretical Results

The associate KΛ(1520) photon and hadronic production in the γp → K+Λ(1520), pp → pK+Λ(1520) and π-p → K0Λ(1520) reactions are investigated within the effective Lagrangian approach and the isobar model. We are interested in the contribution from the N*(2120) (previously called N*(2080)) resonance, which has a significant coupling to the KΛ(1520) channel. The theoretical results show that the current experimental data for the γp → K+Λ(1520) reaction favor the existence of the N*(2120) resonance, and that these measurements can be used to further constrain its properties. We present results, including the N*(2120) contribution, for total cross sections of the γp → K+Λ(1520), π-p → K0Λ(1520), and pp → pK+Λ(1520) reactions. For this latter one, we also calculate invariant mass and Dalitz plot distributions.

Proton-proton scattering at the C. E. R. N. Intersecting Storage Rings

1973 ◽  
Vol 335 (1603) ◽  
pp. 431-452 ◽  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
High Energy ◽  
Storage Rings ◽  
The Other ◽  
Proton Scattering ◽  
High Energy Proton ◽  
Proton Proton ◽  
Total Cross Sections ◽  
Energy Proton

The main features of the C. E. R. N. Intersecting Storage Rings (I. S. R.) are reviewed, together with results obtained in 1971 and 1972 on elastic scattering and total cross-sections. The main result is a 10% increase of the total proton-proton cross-section in the I. S. R. energy range. The simplest picture of high energy proton-proton scattering which emerges from this and the other data, is briefly discussed.

The total cross sections for pion-proton scattering between 70 MeV and 290 MeV

1971 ◽  
Vol 26 (3) ◽  
pp. 445-460 ◽  
Author(s):  
A.A. Carter ◽  
J.R. Williams ◽  
D.V. Bugg ◽  
P.J. Bussey ◽  
D.R. Dance
Keyword(s):  
Cross Sections ◽  
Proton Scattering ◽  
Total Cross Sections

Total cross sections for virtual photon-proton scattering

1986 ◽  
Vol 182 (1) ◽  
pp. 108-110 ◽  
Author(s):  
A. Levy ◽  
U. Maor
Keyword(s):  
Cross Sections ◽  
Virtual Photon ◽  
Proton Scattering ◽  
Total Cross Sections

scholarly journals Single-top and top-antitop cross sections

2018 ◽  
Vol 192 ◽  
pp. 00004
Author(s):  
Nikolaos Kidonakis
Keyword(s):  
Cross Sections ◽  
Top Quark ◽  
Production Cross ◽  
Anomalous Couplings ◽  
Total Cross Sections ◽  
Associated Production ◽  
Single Top ◽  
The Standard Model ◽  
Rapidity Distributions ◽  
Quark Transverse Momentum

I present high-order calculations, including soft-gluon corrections, for single-top and top-antitop production cross sections and differential distributions. For single-top production, results are presented for the three different channels in the Standard Model, for associated production with a charged Higgs, and for processes involving anomalous couplings. For top-antitop pair production, total cross sections and top-quark transverse-momentum and rapidity distributions are presented for various LHC energies.

scholarly journals Probing the anomalous tqγ couplings through single top production at the future lepton–hadron colliders

2019 ◽  
Vol 34 (36) ◽  
pp. 1950298 ◽  
Author(s):  
E. Alici ◽  
M. Köksal
Keyword(s):  
Cross Sections ◽  
Top Quark ◽  
Neutral Current ◽  
New Physics ◽  
Main Reaction ◽  
Flavor Changing ◽  
Effective Lagrangian ◽  
Quark Flavor ◽  
The Future ◽  
Flavor Changing Neutral Current

The measurements of the top quark flavor changing neutral current interactions are one of the most important goals of the top quark physics program in the present and the future collider experiments. These measurements provide direct information on nonstandard interactions of the top quark. Within the framework of new physics beyond the Standard Model, these interactions can be defined by an effective Lagrangian. In this study, we have investigated the potential of the future [Formula: see text] colliders on the top quark flavor changing neutral current interactions through the subprocesses [Formula: see text], where [Formula: see text]. These subprocesses have been produced through the main reaction [Formula: see text] at the LHC-[Formula: see text], the FCC-[Formula: see text] and the SPPC-[Formula: see text]. For the main reaction, the total cross-sections have been calculated as a function of the anomalous [Formula: see text] couplings. In addition, sensitivities on [Formula: see text] at 95% Confidence Level have been calculated. We obtain that the best constraints on [Formula: see text] are at the order of [Formula: see text] which is four orders of magnitude better than the LHC’s experimental results.

scholarly journals Effect of Rapidly Rising Proton?Proton Total Cross Sections on Idealized Extensive Air Showers

1972 ◽  
Vol 25 (6) ◽  
pp. 679
Author(s):  
JA Campbell
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Strong Interaction ◽  
Extensive Air Showers ◽  
Proton Scattering ◽  
Air Showers ◽  
Proton Proton ◽  
Total Cross Sections ◽  
First Time

A simulation of extensive air showers above 1013 eV in which proton?proton scattering takes place partly through a medium-strong interaction is reported. In previous papers the simulation has been shown to be in fair agreement with observational data. The present version includes for the first time the assumption that the total cross section for proton-proton scattering increases with energy, as concluded in a recent paper by Yodh, Pal, and Trefil. The effect of the assumption is to make a noticeably better agreement between the simulation and the data.

scholarly journals The $\gamma p \to na^{+}_{2}(1320) \to n \rho^0 \pi^+$ reactions within an effective Lagrangian approach

2014 ◽  
Vol 23 (06) ◽  
pp. 1460002 ◽  
Author(s):  
Yin Huang ◽  
Ju-Jun Xie ◽  
Xu-Rong Chen ◽  
Jun He ◽  
Hong-Fei Zhang
Keyword(s):  
Photon Energy ◽  
Cross Sections ◽  
Good Description ◽  
Invariant Mass Distribution ◽  
Lagrangian Approach ◽  
Total Cross Sections ◽  
Effective Lagrangian ◽  
Current Experimental Data ◽  
Theoretical Results

We investigate the tensor meson a2(1320) photon-production off proton in the [Formula: see text] and γp → nρ0π+ reactions within the effective Lagrangian approach and isobar model. For [Formula: see text] reaction, by considering the contributions from only the t-channel π+ exchange, we get a fairly good description of the current experimental data for the total cross-section. Based on the theoretical results of the [Formula: see text] reaction, we studied the role of a2(1320) meson in the γp → nρ0π+ reaction, which mainly contributes to the γp → nπ+π+π- reaction. The latter reaction has been measured by the CLAS Collaboration at the photon energy Eγ around 5.1 GeV. For the γp → nρ0π+ reaction, we pay attention to the low photon energy region where the contribution from a2(1320) meson is dominant, while the contribution from the π2(1670) meson could be very small and hence can be neglected. The total cross-sections, invariant mass distribution and the Dalitz plot of γp → nρ0π+ reaction are shown, which can be tested by future experiments.

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