scholarly journals A Critical Study of Quantum Chromodynamics and the Regular Charge-Monopole Theory

2020 ◽  
pp. 18-27
Author(s):  
E. Comay
Keyword(s):  
Quantum Chromodynamics ◽  
High Energy ◽  
Striking Difference ◽  
Critical Study ◽  
Interaction Theory ◽  
Hard Photon ◽  
Proton Proton ◽  
Specific Effects ◽  
Peripheral Location ◽  
Polarized Proton

The compatibility of the strong interaction theory called Quantum Chromodynamics (QCD) with relevant experimental data is critically examined. The clear advantage of the Regular ChargeMonopole Theory over QCD is explained. An analysis of new data provides further support for this claim. The paper points out several specific effects that illustrate this conclusion: the hard photon-nucleon interaction, the striking difference between the high energy electron-proton and proton-proton cross section, the peripheral location of the proton’s antiquark, the strong CP problem, the quite large amount of the ss ¯ pair in the proton, the excess of the proton’s d¯antiquarks over its u¯ antiquarks, and the spin-dependence of high energy polarized proton-proton scattering. These problematic issues are in accordance with M. Gell-Mann’s recently published qualms about the QCD merits.

scholarly journals Status and Prospects of Di-jet Production in High-energy Polarized Proton-Proton Collisions at RHIC at s = 200 GeV

2009 ◽  
Author(s):  
Bernd Surrow ◽  
Donald G. Crabb ◽  
Yelena Prok ◽  
Matt Poelker ◽  
Simonetta Liuti ◽  
...  
Keyword(s):  
High Energy ◽  
Proton Proton ◽  
Proton Collisions ◽  
Jet Production ◽  
Polarized Proton ◽  
200 Gev ◽  
Proton Proton Collisions

scholarly journals ANALYZING POWERS IN INCLUSIVE PION PRODUCTION AT HIGH ENERGY AND THE NUCLEON SPIN STRUCTURE

1999 ◽  
Vol 14 (21) ◽  
pp. 1403-1412 ◽  
Author(s):  
K. SUZUKI ◽  
N. NAKAJIMA ◽  
H. TOKI ◽  
K.-I. KUBO
Keyword(s):  
Pion Production ◽  
Spin Asymmetry ◽  
High Energy ◽  
Distribution Functions ◽  
Proton Proton ◽  
Model Calculations ◽  
Proton Collisions ◽  
Analyzing Powers ◽  
Polarized Proton ◽  
Proton Proton Collisions

Analyzing powers in inclusive pion production in high energy transversely polarized proton–proton collisions are studied theoretically in the framework of the quark recombination model. Calculations by assuming the SU(6) spin-flavor symmetry for the nucleon structure disagree with the experiments. We solve this difficulty by taking into account the realistic spin distribution functions of the nucleon, which differs from the SU(6) expectation at large x, with a perturbative QCD constraint on the ratio of the unpolarized valence distributions, u/d→5 as x→ 1. We also discuss the kaon spin asymmetry and find AN(K+)=-AN(K0) in the polarized proton–proton collisions at large x F .

scholarly journals SINGLE SPIN ASYMMETRY IN HIGH ENERGY QCD

2012 ◽  
Vol 20 ◽  
pp. 177-186
Author(s):  
YURI V. KOVCHEGOV ◽  
MATTHEW D. SIEVERT
Keyword(s):  
Wave Function ◽  
Light Cone ◽  
Spin Asymmetry ◽  
Production Cross ◽  
High Energy ◽  
Transverse Spin ◽  
Proton Proton ◽  
Spin Asymmetries ◽  
Single Spin ◽  
Polarized Proton

We present the first steps in an effort to incorporate the physics of transverse spin asymmetries into the saturation formalism of high energy QCD. We consider a simple model in which a transversely polarized quark scatters on a proton or nuclear target. Using the light-cone perturbation theory the hadron production cross section can be written as a convolution of the light-cone wave function squared and the interaction with the target. To generate the single transverse spin asymmetry (STSA) either the wave function squared or the interaction with the target has to be T-odd. In this work we use the lowest-order q → q G wave function squared, which is T-even, generating the STSA from the T-odd interaction with the target mediated by an odderon exchange. We study the properties of the obtained STSA, some of which are in qualitative agreement with experiment: STSA increases with increasing projectile xF and is a non-monotonic function of the transverse momentum kT. Our mechanism predicts that the quark STSA in polarized proton–nucleus collisions should be much smaller than in polarized proton–proton collisions. We also observe that the STSA for prompt photons due to our mechanism is zero within the accuracy of the approximation.

The Quest for Spinning Glue in High-Energy Polarized Proton-Proton Collisions at RHIC

2007 ◽  
Author(s):  
Bernd Surrow ◽  
Ricardo Alarcon ◽  
Philip L. Cole ◽  
Chaden Djalali ◽  
Fernando Umeres
Keyword(s):  
High Energy ◽  
Proton Proton ◽  
Proton Collisions ◽  
Polarized Proton ◽  
Proton Proton Collisions
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