Pion production at high transverse momentum in 24-GeV proton-proton collisions

Beier, E. W.; Patton, R.; Raychaudhuri, K.; Takeda, Hiroshi; Thern, R.; VanBerg, R.; Weisberg, H.; Good, Myron L.; Grannis, P. D.; Johnson, K. J.; Kirz, Janos

doi:10.1103/physrevd.18.2235

Cited by 17 publications

(21 citation statements)

References 16 publications

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“…Eqs. (23) and (24) show only characteristic parts of these dependencies. The realistic choice of the corresponding parameterizations of the structure and fragmentation functions as well as choice of the x-dependence of constituent quark polarization would allow to get description of the x-dependence of asymmetries.…”

Section: Summary and Discussionmentioning

confidence: 99%

“…at different energies [24]. Due to this we consider asymmetries A N in the processes with polarized initial proton:…”

Section: Numerical Analysismentioning

confidence: 99%

“…2, therefore we take L {qq} = 1/3. The explicit form for dσ/dξ and values of the parameters therein we borrowed from [24]. It has typical two-component behavior:…”

Section: Numerical Analysismentioning

confidence: 99%

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Spin content of constituent quarks and one-spin asymmetries in inclusive processes

Troshin

Tyurin

1995

Phys. Rev. D

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We consider mechanism for one-spin asymmetries observed in inclusive hadron production. The main role belongs to the orbital angular momentum of the quark-antiquark cloud in the internal structure of constituent quarks. We argue that the origin of the asymmetries in pion production is a result of retaining of this internal angular orbital momentum by the perturbative phase of QCD under transition from the non-perturbative phase. The non-perturbative hadron structure is based on the results of chiral quark models.

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Section: Summary and Discussionmentioning

confidence: 99%

“…at different energies [24]. Due to this we consider asymmetries A N in the processes with polarized initial proton:…”

Section: Numerical Analysismentioning

confidence: 99%

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Spin content of constituent quarks and one-spin asymmetries in inclusive processes

Troshin

Tyurin

1995

Phys. Rev. D

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“…• in the center-of-mass, with a fit given by Beier et al [7] Where the data overlap the naive relation…”

Section: Leading Twist Processes and Soft Processesmentioning

confidence: 99%

Interplay of Hard and Soft Processes at Jlab Energies

Afanasev

Carlson

2003

GDH 2002

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Even at moderate energy machines, there is a regime where hard pion electroproduction proceeds by a perturbatively calculable process. The process, we claim, is not the leading twist fragmentation one but rather a higher twist process that produces kinematically isolated pions. Semiexclusive data may teach us more about parton distribution functions of the target and the pion distribution amplitude. In addition, there is a connection to generalized parton distribution calculations of exclusive processes in that the perturbative kernel is the same.

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“…above p t = 2 GeV/c) changes drastically with energy since the kinematic limit becomes important here (see e.g. [14]). Therefore, any parametrization introduces a large systematic error.…”

Section: Baseline Measurements In P+p and P+amentioning

confidence: 99%

High pT Measurements at the CERN SPS

Blume

2007

Nuclear Physics A

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The current experimental situation concerning high p t observables at the CERN SPS is reviewed. Recent data from the NA45, NA49 and NA57 collaborations are discussed and compared to earlier measurements by WA98 and NA45 at the same center-of-mass energies, as well as to measurements at the higher energies by the RHIC experiments. The observables include new p+p, A+A spectra, nuclear modification factors (R AA , R CP ), two particle azimuthal correlations, and baryon to meson ratios at moderately high p t . Generally, the interpretation of the SPS data suffers from the lack of reliable baseline measurements (p+p and p+A). However, the overall picture that is emerging suggests that already at SPS energies medium effects similar to those observed at RHIC are present.

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Pion production at high transverse momentum in 24-GeV proton-proton collisions

Cited by 17 publications

References 16 publications

Spin content of constituent quarks and one-spin asymmetries in inclusive processes

Spin content of constituent quarks and one-spin asymmetries in inclusive processes

Interplay of Hard and Soft Processes at Jlab Energies

High pT Measurements at the CERN SPS

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