Cross Section and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mn>20</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>in O° Deuteron Breakup at 2.1 GeV

Perdrisat, C. F.; Punjabi, V.; Lyndon, C.; Yonnet, Jean‐Paul; Beurtey, R.; Boivin, M.; Boudard, A.; Didélez, J. P.; Frascaria, R.; Reposeur, T.; Siebert, R.; Warde, E.; Plouin, F.; Gugelot, P. C.; Grossiord, J. Y.

doi:10.1103/physrevlett.59.2840

Cited by 56 publications

(41 citation statements)

References 17 publications

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“…In the proton spectra, measured at 9.1GeV/c [2,6], in the region of momenta detected 0.25-0.35 GeV/c (in the deuteron rest frame) one can observe a characteristic bump where the measured differential cross section for the tH(d, p)X reaction exceeds the results of calculations made within the framework of the relativistic impulse approximation by more than twice. A similar salient feature is also observed in the differential cross sections for the A(d, p)X reactions at 2.5 and 3.5GeV/c [4].…”

Section: Pacs: 2545-z;supporting

confidence: 63%

“…In particular, measurements have been made of the momentum spectra of protons emitted at an angle of 0 ~ in the 1H(d, p)X reaction at initial momenta of deuterons of 2.5 and 3.5 [4], 5.75 [5] and 9.1GeV/c [6]. In the proton spectra, measured at 9.1GeV/c [2,6], in the region of momenta detected 0.25-0.35 GeV/c (in the deuteron rest frame) one can observe a characteristic bump where the measured differential cross section for the tH(d, p)X reaction exceeds the results of calculations made within the framework of the relativistic impulse approximation by more than twice.…”

Section: Pacs: 2545-z;mentioning

confidence: 99%

“…In recent years, for obtaining information on the highmomentum component of the deuteron wave function, a number of experiments have been carried out to investigate the fragmentation of relativistic deuterons on nuclei [1][2][3][4]. In particular, measurements have been made of the momentum spectra of protons emitted at an angle of 0 ~ in the 1H(d, p)X reaction at initial momenta of deuterons of 2.5 and 3.5 [4], 5.75 [5] and 9.1GeV/c [6].…”

Section: Pacs: 2545-z;mentioning

confidence: 99%

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Possible interpretation of the ?anomalous? behaviour of the proton spectrum at 0� from the deuteron fragmentation at 9 GeV/c

Azhgirey

Ignatenko

Yudin³

1992

Z. Physik A - Hadrons and Nuclei

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The momentum spectra of protons, produced at 0 ~ as a result of fragmentation of relativistic deuterons on nuclei, are analyzed. Possible causes of the existing discrepancy of the data on the 0 ~ proton spectrum from the 1H(d,p)X reaction at 9.1 GeV/c with results of the impulse approximation calculations are considered. It is shown that taking into account the finite angular resolution of the experimental setup and the corresponding renormalization of the experimental data, on the one hand, and also the inclusion of the additional (to stripping) contribution of protons from the scattering of deuteron nucleons by target protons, on the other, make it possible to match these data with the results of calculations within the framework of the relativistic impulse approximation using the deuteron wave function for the Paris potential. In the literature various hypotheses have been put forward to explain the above-mentioned salient feature in the proton spectra at 0 ~ Among them are assumption about the presence of admixture of a six-quark component in the deuteron wave function [2,6], about the contribution of processes with the production of intermediate pions and with their subsequent absorption or rescattering by a spectator nucleon [7,8], about the different restrictions on the phase space near the kinematic boundary of the proton spectrum for the elastic and inelastic reaction channels E9], and about the contribution of processes of multiple nucleon scattering [10]. PACSAnother problem, associated with the data on the fragmentation of relativistic deuterons into protons at 0 ~ consists in that the invariant differential cross sections for the 1H(d,p(O~ reaction at 5.75 and 9.1GeV/c, plotted as function of the proton momentum in the deuteron rest frame, contrary to expectations, differ by the absolute value: for matching the spectra with each other the data at 5.75 GeV/c should be multiplied by a factor of 1.4 [6]. The fact that the data of [5] and 1-6] are inconsistent with each other was also pointed out in [10].In the present paper we consider two effects which could account for the anomalous behaviour of the momentum proton spectrum in the 1H(d, p)X reaction at 0 ~ at 9.1 GeV/c. The first effect is of methodical character and is associated with the finite angular resolution of the experimental setup, which should be taken into account when comparing the results of calculations with the experimental data. The second is due to the presence, apart from direct fragmentation, of the processes of scattering of deuteron nucleons by the target proton. .We shall consider the process of fragmentation of a deuteron on a nucleus in the impulse approximation. A deviation from the impulse approximation due to rescatterins or final state interaction in the kinematical condi-

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Section: Pacs: 2545-z;supporting

confidence: 63%

Section: Pacs: 2545-z;mentioning

confidence: 99%

Section: Pacs: 2545-z;mentioning

confidence: 99%

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Possible interpretation of the ?anomalous? behaviour of the proton spectrum at 0� from the deuteron fragmentation at 9 GeV/c

Azhgirey

Ignatenko

Yudin³

1992

Z. Physik A - Hadrons and Nuclei

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“…During last 15 years detailed data on A(d, p) differential cross section (DCS) [1]- [2], tensor analizing power, T 20 [3]- [9], and coefficient of polarization transfer, κ 0 [7], [10]- [12], have been obtained. These data together with data obtained from electromagnetic probe, give important information about the deuteron structure in a wide region, including that of a smooth transition from nucleon-meson to quark-gluon picture.…”

mentioning

confidence: 99%

Polarization observables in A(d,p) breakup and quark degrees of freedom in the deuteron

Kobushkin

1998

Physics Letters B

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The differential cross section, the tensor analyzing power, T 20 , and the polarization transfer, κ 0 , in 12 C(d, p) breakup at relativistic energy are calculated within a model which incorporates multiple scattering and Pauli principle at quark level. It is shown that the rescattering and quark exchange affect drastically the polarization observables for kinematical region corresponding to high internal momentum in the deuteron.

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“…Measurements of differential cross sections of deuteron inclusive breakup on nuclei at a zero proton emission angle [1,2,3,4] have shown that these data can be explained within the framework of the relativistic impulse approximation (RIA) using standard deuteron wave functions except for the vicinity of the internal nucleon momentum k ∼ 0.35 GeV/c in the deuteron deˇned in the light-front dynamics [5]. The observed broad shoulder at these k was explained by the manifestation of the quark degrees of freedom [6] as well as by taking into account the mechanisms additional to RIA [7].…”

mentioning

confidence: 99%

Proposal of the experiment on the investigation of the (d, p) reaction at the extracted deuteron beam of the U-70 accelerator

Azhgirey

Ladygin

Zhmyrov

et al. 2007

Phys. Part. Nuclei Lett.

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Azhgirey L. S., Ladygin V. P., Zhmyrov V. N., Zolin L. S. E1-2006-156 Proposal of the Experiment on Investigation of the (d, p) Reaction at the Extracted Deuteron Beam of the U-70 AcceleratorAn experiment on the investigation of the A(d, p)X reaction at the extracted deuteron beam created at the Serpukhov U-70 accelerator is proposed. Precise measurements of the momentum spectra of protons emitted in the (d, p) reaction at initial deuteron momenta of 20Ä40 GeV/c can give unique information on the deuteron short-range structure. A manifestation of contribution of non-nucleonic degrees of freedom in the deuteron is entirely possible over this energy range.The investigation has been performed at the Veksler and Baldin Laboratory of High Energies, JINR.

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Cross Section andT20in O° Deuteron Breakup at 2.1 GeV

Cited by 56 publications

References 17 publications

Possible interpretation of the ?anomalous? behaviour of the proton spectrum at 0� from the deuteron fragmentation at 9 GeV/c

Possible interpretation of the ?anomalous? behaviour of the proton spectrum at 0� from the deuteron fragmentation at 9 GeV/c

Polarization observables in A(d,p) breakup and quark degrees of freedom in the deuteron

Proposal of the experiment on the investigation of the (d, p) reaction at the extracted deuteron beam of the U-70 accelerator

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