Analyzing power measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>pp</mml:mi></mml:math>elastic scattering in the Coulomb-nuclear interference region with the 200-GeV/<i>c</i>polarized-proton beam at Fermilab

Akchurin, N.; Langland, J.; Onel, Y.; Bonner, B. E.; Corcoran, M.; Cranshaw, J.; Nessi‐Tedaldi, F.; Nessi, M.; Nguyen, C.; Roberts, J.; Skeens, J.; White, J. L.; Bravar, A.; Giacomich, R.; Penzo, A.; Schiavon, P.; Zanetti, A.; Bystrický, J.; Lehar, F.; Lesquen, A. de; Rossum, L. van; Cossairt, J.D.; Read, A. L.; Derevschikov, A. A.; Matulenko, Yu. A.; Meschanin, A.; Nurushev, S. B.; Patalakha, D. I.; Rykov, V. L.; Solov'yanov, V.L.; Vasiliev, A. N.; Grosnick, D.; Hill, D.; Laghai, M.; Lopiano, D.; Ōhashi, Y.; Shima, T.; Spinka, H.; Stanek, R. W.; Underwood, D. G.; Yokosawa, A.; Funahashi, H.; Goto, Y.; Imai, K.; Itow, Y.; Makino, S.; Masaike, A.; Miyake, Kazumasa; Nagamine, T.; Saito, N.; Yamashita, S.; Iwatani, Kazuo; Kuroda, K.; Michalowicz, A.; Luehring, F.; Miller, Donald H.; Mäki, T.; Pauletta, G.; Rappazzo, G. F.; Salvato, G.; Takashima, R.; Takéutchi, F.

doi:10.1103/physrevd.48.3026

Cited by 40 publications

(15 citation statements)

References 26 publications

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“…By measuring imaginary and real parts of a zero angle scattering amplitude in a wide energy range we get a possibility to check up unitarity and analicity principles. As the direct measurements of the real part of the forward scattering amplitude in ordinary scattering experiments are practically impossible, it is necessary to measure the differential cross section and other observables for smallangle range of the coulomb-nuclear interference with subsequent extrapolation of data to the zero angle (Akchurin et al 1993). There is, however, a possibility of the direct measurement of the real part of the forward scattering amplitude (Baryshevsky 1992(Baryshevsky , 1993.…”

Section: Introductionmentioning

confidence: 99%

The effect of spin oscillation of relativistic particles passing through substance and the possibility of constituent quark rescattering observation at -hyperon-proton collision

Baryshevsky¹,

Батраков²,

Cherkas

1998

J. Phys. G: Nucl. Part. Phys.

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Section: Introductionmentioning

confidence: 99%

The effect of spin oscillation of relativistic particles passing through substance and the possibility of constituent quark rescattering observation at -hyperon-proton collision

Baryshevsky¹,

Батраков²,

Cherkas

1998

J. Phys. G: Nucl. Part. Phys.

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“…In addition to the above transverse effects, contributions from a longitudinal total cross section difference measured at Fermilab [16] ∆σ L = 0.040 ± 0.048 ± 0.052 mb (200 GeV) (14) are negligible at 200 GeV/c but little is currently known about the corresponding real part or the values at higher energies. Further enhancement of the cross section can result from a consideration of vacuum polarization contributions to the photon propagator.…”

Section: Spin Dependent Effectsmentioning

confidence: 99%

“…Other measurements taken at Fermilab [14] and at Brookhaven National Laboratory [15] have indicated that the absolute value of the single helicity flip hadronic amplitude at a number of energies is limited by …”

Section: Spin Dependent Effectsmentioning

confidence: 99%

Forward collisions and spin effects in evaluating amplitudes

Buttimore¹

2011

AIP Conference Proceedings

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Abstract. Total cross sections and the phases of forward collision amplitudes form part of the early studies when a new energy window becomes available as is provided by the Large Hadron Collider. Enhancement of the forward elastic differential cross section above that expected from estimates of dispersion and optical theorem values may result from the presence of hadronic spin dependence in addition to effects induced by vacuum polarization contributions to the photon propagator. The elastic scattering of protons and ions at small angles is important in the evaluation of the luminosities of the corresponding incident beams and invites detailed examination. Polarization measurements taken at a number of high energies have yielded information on the extent of spin effects in hadronic scattering, particularly at the low momentum transfers related to diffraction.

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“…The presence of q$Fd(s,t) should introduce a deviation in magnitude from the first term and, consequently, there is no precise prediction Of A N . An initial measurement Of AN in the CNI region was performed by the E704 experiment at 200 GeV/c [3]. However, precision of data was insufficient for polarimetry.…”

mentioning

confidence: 99%

Absolute polarimetry at RHIC

Okada¹,

Alekseev²,

Bravar³

et al. 2008

AIP Conference Proceedings

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Abstract. Precise and absolute beam polarization measurements are critical for the RHIC spin physics program. Because all experimental spin-dependent results are normalized by beam polarization, the normalization uncertainty contributes directly to final physics uncertainties. We aimed to perform the beam polarization measurement to an accuracy Of A&am/Pbeam < 5%.The absolute polarimeter consists of Polarized Atomic Hydrogen Gas Jet Target and left-right pairs of silicon strip detectors and was installed in the RHIC-ring in 2004. This system features proton-proton elastic scattering in the Coulomb nuclear interference (CNI) region. Precise measurements of the analyzing power AN of this process has allowed us to achieve Mbeam/Pbeam = 4.2% in 2005 for the first long spin-physics run.In this report, we describe the entire set up and performance of the system. The procedure of beam polarization measurement and analysis results from 2004 -2005 are described. Physics topics of AN in the CNI region (four-momentum transfer squared 0.001 < -t < 0.032 (GeV/c)2) are also discussed. We point out the current issues and expected optimum accuracy in 2006 and the future.

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Analyzing power measurement ofppelastic scattering in the Coulomb-nuclear interference region with the 200-GeV/cpolarized-proton beam at Fermilab

Cited by 40 publications

References 26 publications

The effect of spin oscillation of relativistic particles passing through substance and the possibility of constituent quark rescattering observation at -hyperon-proton collision

The effect of spin oscillation of relativistic particles passing through substance and the possibility of constituent quark rescattering observation at -hyperon-proton collision

Forward collisions and spin effects in evaluating amplitudes

Absolute polarimetry at RHIC

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