scholarly journals Physics Opportunities at a Photon–Photon Collider

2003 ◽  
Vol 18 (16) ◽  
pp. 2871-2892 ◽  
Author(s):  
Stanley J. Brodsky
Keyword(s):  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering ◽  
High Energy ◽  
Quadrupole Moments ◽  
Spin Asymmetries ◽  
Polarized Beams ◽  
Single Spin ◽  
Single Spin Asymmetries ◽  
Photon Collider ◽  
Electron Photon

The advent of back-scattered laser beams for e±e-colliders will allow detailed studies of a large array of high energy γγ and γe collision processes with polarized beams. These include tests of electroweak theory in photon-photon annihilation such as γγ → W+W-, γγ → Higgs bosons, and higher-order loop processes, such as γγ → γγ, Zγ, H0Z0and ZZ. Methods for measuring the anomalous magnetic and quadrupole moments of the W and Z gauge bosons to high precision in polarized electron-photon and photon-photon collisions are discussed. Since each photon can be resolved into a W+W-pair, high energy photon-photon collisions can also provide a remarkably background-free laboratory for studying WW collisions and annihilation. I also review high energy γγ and eγ tests of quantum chromodynamics, including the production of two gluon jets in photon-photon collisions, deeply virtual Compton scattering on a photon target, and leading-twist single-spin asymmetries for a photon polarized normal to a production plane. Exclusive hadron production processes in photon-photon collisions provide important tests of QCD at the amplitude level, particularly as measures of hadron distribution amplitudes which are also important for the analysis of exclusive semi-leptonic and two-body hadronic B-decays.

scholarly journals Single-spin asymmetries for small-angle pion production in high-energy hadron collisions

1999 ◽  
Vol 11 (4) ◽  
pp. 703-708 ◽  
Author(s):  
A. Ahmedov ◽  
I.V. Akushevich ◽  
E.A. Kuraev ◽  
P.G. Ratcliffe
Keyword(s):  
Small Angle ◽  
Pion Production ◽  
High Energy ◽  
Spin Asymmetries ◽  
Single Spin ◽  
Single Spin Asymmetries ◽  
Energy Hadron

scholarly journals Single-spin asymmetries for small-angle pion production in high-energy hadron collisions

1999 ◽  
Vol 11 (4) ◽  
pp. 703 ◽  
Author(s):  
A. Ahmedov ◽  
I.V. Akushevich ◽  
E.A. Kuraev ◽  
P.G. Ratcliffe
Keyword(s):  
Small Angle ◽  
Pion Production ◽  
High Energy ◽  
Spin Asymmetries ◽  
Single Spin ◽  
Single Spin Asymmetries ◽  
Energy Hadron

scholarly journals SINGLE SPIN ASYMMETRIES IN INCLUSIVE HIGH ENERGY HADRON–HADRON COLLISION PROCESSES

2000 ◽  
Vol 15 (07) ◽  
pp. 927-982 ◽  
Author(s):  
ZUO-TANG LIANG ◽  
C. BOROS
Keyword(s):  
Parton Model ◽  
High Energy ◽  
Special Role ◽  
Hadron Collision ◽  
Spin Asymmetries ◽  
Single Spin ◽  
Theoretical Approaches ◽  
Single Spin Asymmetries ◽  
Long Time ◽  
Energy Hadron

It has been realized for quite a long time that single-spin experiments, in which one of the colliding objects is transversely polarized, can be helpful in studying the properties of strong interaction in general and in testing quantum chromodynamics (QCD) in particular. Striking effects have been observed in the past few years which deviate drastically from the expectation of the perturbative QCD parton model. These effects have received much attention. New experiments of the similar type are underway and/or planned. Different theoretical attempts have been made to understand these effects. In this review, the special role played by singly polarized high-energy hadron–hadron collisions in high energy spin physics is emphasized. Characteristics of the available data for inclusive hadron productions are briefly summarized. Different theoretical approaches for such processes are reviewed with special attention to a nonperturbative model which explicitly takes the orbital motion of the valence quarks and hadronic surface effects into account. The connection between such asymmetries and hyperon polarization in unpolarized reactions is discussed. An example of the possible application of such experimental results in other processes is given.

scholarly journals Gluon Sivers function and transverse single spin asymmetries in e+p↑→γ+X

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Siddhesh Padval ◽  
Rohini M. Godbole ◽  
Abhiram Kaushik ◽  
Anuradha Misra ◽  
Vaibhav S. Rawoot
Keyword(s):  
Spin Asymmetries ◽  
Single Spin ◽  
Single Spin Asymmetries ◽  
Sivers Function

scholarly journals Study of single-spin asymmetries with polarized target at the SPASCHARM experiment at U70 accelerator

2017 ◽  
Vol 798 ◽  
pp. 012096
Author(s):  
V V Abramov ◽  
N A Bazhanov ◽  
N I Belikov ◽  
A A Borisov ◽  
N S Borisov ◽  
...  
Keyword(s):  
Spin Asymmetries ◽  
Single Spin ◽  
Polarized Target ◽  
Single Spin Asymmetries

scholarly journals CRITICAL PHENOMENA IN DEEP INELASTIC SCATTERING

2010 ◽  
Vol 25 (31) ◽  
pp. 5667-5682 ◽  
Author(s):  
L. L. JENKOVSZKY ◽  
ANDREA NAGY ◽  
S. M. TROSHIN ◽  
JOLÁN TURÓCI ◽  
N. E. TYURIN
Keyword(s):  
Phase Transition ◽  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Deeply Virtual Compton Scattering ◽  
Virtual Compton Scattering ◽  
Heavy Ion ◽  
High Energy ◽  
Ion Collisions ◽  
Bjorken X ◽  
Insight Into

Saturation in deep inelastic scattering and deeply virtual Compton scattering is associated with a phase transition between the partonic gas, typical of moderate x and Q2, and partonic fluid appearing at increasing Q2 and decreasing Bjorken x. In this paper we do not intend to propose another parametrization of the structure function; instead we suggest a new insight into the internal structure of the nucleon, as seen in deep inelastic scattering, and its connection with that revealed in high-energy nucleons and heavy-ion collisions.

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