First results for the two-spin parameter ALL in π0 production by 200 GeV polarized protons and antiprotons

Adams, T.; Akchurin, N.; Belikov, N.I.; Bystrický, J.; Chaumette, P.; Corcoran, M.; Cossairt, J.D.; Cranshaw, J.; Deregel, J.; Derevshchikov, A.A.; Durand, G.; En’yo, H.; Fabre, J.; Fukuda, Kuniya; Funahashi, H.; Goto, Y.; Grachov, O.; Grosnick, D.; Hill, D.; Imai, K.; Itow, Y.; Iwatani, Kazuo; Kasprzyk, T.; Krger, K W.; Kuroda, K.; Laghai, M.; Lehar, F.; Lesquen, A. de; Lopiano, D.; Luehring, F.; Mäki, T.; Makino, S.; Masaike, A.; Yu, A. Matulenko; Meshchanin, A.P.; Michalowicz, A.; Miller, Donald H.; Miyake, Kazumasa; Nagamine, T.; Nessi‐Tedaldi, F.; Nessi, M.; Nguyen, C.; Nurushev, S. B.; Ōhashi, Y.; Onel, Y.; Patalakha, D. I.; Pauletta, G.; Penzo, A.; Read, A. L.; Roberts, J.; Rossum, L. van; Rykov, V. L.; Saito, N.; Salvato, G.; Schiavon, P.; Shepard, J.R.; Skeens, J.; Solov'yanov, V.L.; Spinka, H. M.; Takashima, R.; Takéutchi, F.; Tamura, N.; Tanaka, N.; Underwood, D. G.; Vasil'ev, A.N.; Villari, A.; White, J. L.; Yamashita, Shinji; Yokosawa, A.; Yoshida, Takashi; Zanetti, A.

doi:10.1016/0370-2693(91)91350-5

Cited by 38 publications

(12 citation statements)

References 6 publications

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“…Again the scales have been chosen to be µ = p T . We also show the data by the Fermilab E704 experiment [8]. As expected from Fig.…”

Section: Phenomenological Resultssupporting

confidence: 66%

“…We will focus here on pp → π 0 X in fixed-target scattering at √ S = 19.4 GeV and at √ S = 62.4 GeV at the RHIC collider. In both these cases, experimental data exist [8,17].…”

Section: Phenomenological Resultsmentioning

confidence: 99%

“…range) , (4.24) Figure 3: Results for the double-spin asymmetry A π LL at NLO and for the NLL resummed case for various sets of polarized parton distributions, at √ S = 19.4 GeV. We also show the experimental data of [8].…”

Section: Phenomenological Resultsmentioning

confidence: 99%

“…The Fermilab E704 fixed-target experiment presented measurements of A π LL for 200 GeV protons impeding on a proton target [8], resulting in √ S = 19.4 GeV center-of-mass (c.m.) energy.…”

Section: Introductionmentioning

confidence: 99%

“…An interesting question is whether this information already puts a constraint on ∆g at the x values relevant here, 0.1 x 0.4. In [8] the experimental data were also compared to theoretical leading-order (LO) calculations using various different ∆g distributions. It was found that indeed there was some sensitivity of the data to ∆g, with extremely large ∆g (of size similar to the unpolarized gluon distribution in the accessed x region) seemingly ruled out.…”

Section: Introductionmentioning

confidence: 99%

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Single-inclusive hadron production in polarizedppscattering at next-to-leading logarithmic accuracy

Vogelsang

Wagner

2007

Phys. Rev. D

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We study the resummation of large logarithmic perturbative corrections to the partonic cross sections relevant for the process pp → hX at high transverse momentum of the hadron h, when the initial protons are longitudinally polarized. We perform the resummation to next-to-leading logarithmic accuracy. We present numerical results for center-of-mass energies √ S = 19.4 GeV, relevant for comparisons to data from the Fermilab E704 experiment, and √ S = 62.4 GeV, where preliminary data from RHIC have recently become available. We find significant enhancements of the spindependent cross sections, but a decrease of the double-spin asymmetry for the process. This effect is less pronounced at the higher energy.

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“…Again the scales have been chosen to be µ = p T . We also show the data by the Fermilab E704 experiment [8]. As expected from Fig.…”

Section: Phenomenological Resultssupporting

confidence: 66%

“…We will focus here on pp → π 0 X in fixed-target scattering at √ S = 19.4 GeV and at √ S = 62.4 GeV at the RHIC collider. In both these cases, experimental data exist [8,17].…”

Section: Phenomenological Resultsmentioning

confidence: 99%

Section: Phenomenological Resultsmentioning

confidence: 99%

“…The Fermilab E704 fixed-target experiment presented measurements of A π LL for 200 GeV protons impeding on a proton target [8], resulting in √ S = 19.4 GeV center-of-mass (c.m.) energy.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Single-inclusive hadron production in polarizedppscattering at next-to-leading logarithmic accuracy

Vogelsang

Wagner

2007

Phys. Rev. D

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Inclusive Hadron Production

Nurushev

Runtso

Strikhanov

2013

Introduction to Polarization Physics

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The shape of polarized gluon distributions

Morii

Tanaka

Yamanishi

1995

Z. Phys. C - Particles and Fields

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The recent high precision SMC data on polarized µp scatterings have again confirmed that very little of the proton spin is carried by quarks. To unravel the mystery of the proton spin structure, it is quite important to know the behavior of the polarized gluon distribution.By using the positivity condition of distribution functions together with the unpolarized and polarized experimental data, we restrict the x dependence of the polarized gluon distribution. †

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First results for the two-spin parameter ALL in π0 production by 200 GeV polarized protons and antiprotons

Cited by 38 publications

References 6 publications

Single-inclusive hadron production in polarizedppscattering at next-to-leading logarithmic accuracy

Single-inclusive hadron production in polarizedppscattering at next-to-leading logarithmic accuracy

Inclusive Hadron Production

The shape of polarized gluon distributions

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