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Tensor analyzing power T(20) for cumulative pion production from deuterons in a GeV energy region.

Afanasev, S. ; Anisimov, Yu. ; Fujieda, M. ; et al.

Nucl.Phys.A 625 (1997) 817-831, 1997.

Inspire Record 454165 DOI 10.17182/hepdata.36286

The tensor analyzing power T 20 for the reaction d ↑ + 12 C → π ± (0°) + X has been measured with a polarized deuteron beam from 6.2 to 9.0 GeV/ c at a pion momentum3.0 GeV/ c . This experiment is focused on “cumulatively produced pions”, which are produced beyond the kinematically allowed limit for free nucleon-nucleon collisions. The measured values of T 20 turn out to be close to zero. They are in disagreement with the results of our impulse approximation calculation which is based on a single NN → πNN interaction and takes into account the internal motion of nucleons in the deuteron. Possible explanations of the result are discussed.

3 data tables

Table 1

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Table 3

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THE MULTIPLICITY OF THE SECONDARY CHARGED PARTICLES IN INELASTIC INTERACTIONS OF DEUTERIUM AND NEUTRONS WITH TANTALUM AND CARBON NUCLEI AT 1-GeV/c PER NUCLEON

Bekmirzaev, R.N. ; Grishin, V.G. ; Muminov, M.M. ; et al.

JINR-P1-83-481, 1983.

Inspire Record 194488 DOI 10.17182/hepdata.39087

None

4 data tables

Table 1

No description provided.

Table 2

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Table 3

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Measurement of the tensor analyzing power T(20) in inclusive deuteron breakup at 9-GeV/c on hydrogen and carbon

Azhgirey, L.S. ; Afanasyev, S.V. ; Chernykh, E.V. ; et al.

Phys.Lett.B 387 (1996) 37-42, 1996.

Inspire Record 328522 DOI 10.17182/hepdata.28341

The tensor analyzing power T 20 in inclusive deuteron breakup at 9 GeV/c and 0° on hydrogen and carbon targets up to internal momenta k of the proton in the deuteron of ∼ 1 GeV/c has been measured. The analyzing power remains negative up to the highest measured values of k , and is in definite disagreement with predictions from several theoretical models. A systematic difference between T 20 for deuteron breakup on hydrogen and carbon is observed.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Measurement of the tensor analyzing power T(20) for d (polarized) + C-12 ---> p (0-degrees) + X in the region of internal momenta in the deuteron up to 1-GeV/c

Aono, T. ; Chernykh, E.V. ; Dzikowski, T. ; et al.

Phys.Rev.Lett. 74 (1995) 4997-5000, 1995.

Inspire Record 379428 DOI 10.17182/hepdata.19648

The tensor analyzing power T20 for the reaction d↑+12C→p(0°)+X has been measured in the region of proton internal momenta k in light-cone dynamics up to 1 GeV/ c. Measurements have been carried out at Dubna Synchrophasotron with polarized deuteron beam at deuteron momenta up to 9 GeV/ c. When k increases the experimental values of T20 have a tendency to approach the value ( −0.3) obtained by the calculation based on the reduced nuclear amplitude method in which the quark degrees of freedom are taken into account.

1 data table

Table 1

The momentum K, called momentum in light-cone dynamics, is expressed by thefollowing formula k**2=mt**2/(4*alpha*(1-alpha))-m**2,with mt**2=kt**2+m**2 wh ere kt is the proton transverse momentum.The light-cone variable alpha is the p art of the deuteron momentum carried by the proton in the infinite momentum frameand is expressed by the formula alpha=(Ep+Pp)/(Ed+Pd).

Rapidity distributions of protons in (p, d, alpha, C) C interactions at 4.2-GeV/c per nucleon

Bekmirzaev, R.N. ; Kladnitskaya, E.N. ; Muminov, M.M. ; et al.

Phys.Atom.Nucl. 58 (1995) 1548-1554, 1995.

Inspire Record 382325 DOI 10.17182/hepdata.38665

None

7 data tables

Table 1

ASYM is defined as follows: ASYM = (SIG(YRAP(P=3,RF=LAB)<1.1) - (SIG(YRAP(P=3,RF=LAB)>1.1)) / (SIG(YRAP(P=3,RF=LAB)<1.1)+ SIG(YRAP(P=3,RF=LAB)>1.1)).

Table 2

ASYM is defined as follows: ASYM = (SIG(YRAP(P=3,RF=LAB)<1.1) - (SIG(YRAP( P=3,RF=LAB)>1.1)) / (SIG(YRAP(P=3,RF=LAB)<1.1)+SIG(YRAP(P=3,RF=LAB)>1.1)).

Table 3

ASYM is defined as follows: ASYM = (SIG(YRAP(P=3,RF=LAB)<1.1) - (SIG(YRAP( P=3,RF=LAB)>1.1)) / (SIG(YRAP(P=3,RF=LAB)<1.1)+SIG(YRAP(P=3,RF=LAB)>1.1)).

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Tensor analyzing power T(20) for cumulative pion production from deuterons in a GeV energy region.

THE MULTIPLICITY OF THE SECONDARY CHARGED PARTICLES IN INELASTIC INTERACTIONS OF DEUTERIUM AND NEUTRONS WITH TANTALUM AND CARBON NUCLEI AT 1-GeV/c PER NUCLEON

Measurement of the tensor analyzing power T(20) in inclusive deuteron breakup at 9-GeV/c on hydrogen and carbon

Measurement of the tensor analyzing power T(20) for d (polarized) + C-12 ---> p (0-degrees) + X in the region of internal momenta in the deuteron up to 1-GeV/c

Rapidity distributions of protons in (p, d, alpha, C) C interactions at 4.2-GeV/c per nucleon

Dependence of spectra and cross-sections yield of proton at the energy more than 0.4-GeV at fixed angles on atomic weights of colliding nuclei in nucleus-nucleus interactions

Analyzing power of the reactions d(pol.) + C --> p + X and d(pol.) + C --> p + p (d) + X at energies of 0.6-GeV/nucleon to 2.1-GeV/nucleon.

MEASUREMENT OF INELASTIC AND TOPOLOGICAL CROSS-SECTIONS OF INTERACTION OF DEUTERONS WITH CARBON NUCLEI AT ENERGY 1-GeV PER NUCLEON

INCLUSIVE AND MULTIPLE CHARACTERISTICS OF CUMULATIVE PROTONS IN NUCLEUS-NUCLEUS INTERACTIONS AT 4.2-GeV/c PER NUCLEON

INVESTIGATION OF MOMENTUM AND ANGULAR CHARACTERISTICS OF PROTONS PRODUCED IN n C AND n Ta INTERACTIONS AT 4.2-GeV/c MOMENTUM