Pion absorption by He3 at the Δ resonance energy

S. Mukhopadhyay; S. Levenson; R. E. Segel; G. Garino; D. Geesaman; J. P. Schiffer; G. Stephans; B. Zeidman; E. Ungricht; H. Jackson; R. Kowalczyk; D. Ashery; E. Piasetsky; M. Moinester; I. Navon; L. C. Smith; R. C. Minehart; G. S. Das; R. R. Whitney; R. McKeown; B. Anderson; R. Madey; J. Watson

doi:10.1103/PhysRevC.43.957

Pion absorption by He3 at the Δ resonance energy

S. Mukhopadhyay^*, S. Levenson, R. E. Segel, G. Garino, D. Geesaman, J. P. Schiffer, G. Stephans, B. Zeidman, E. Ungricht, H. Jackson, R. Kowalczyk, D. Ashery, E. Piasetsky, M. Moinester, I. Navon, L. C. Smith, R. C. Minehart, G. S. Das, R. R. Whitney, R. McKeownB. Anderson, R. Madey, J. Watson

^*Corresponding author for this work

School of Physics and Astronomy

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Abstract

Pion absorption by He3 was studied at T=165 MeV in a kinematically complete experiment. The cross section for absorption on a (pn) pair of nucleons, pn(+), was found to be 17.0±2.6 mb; that for absorption on a (pp) pair, pp(-), 0.91±0.20 mb. The angular distribution in the NN center-of-mass system for pn(+) resembles that for the ++dp+p reaction while the angular distribution for pp(-) is strongly backward peaked. Evidence that a significant fraction of the absorptions involves all three target nucleons is seen in the angular correlation between the two detected nucleons as well as in the momentum distribution of the unobserved nucleon. For + and - absorption, the three-body cross sections were found to be 9.6±2.1 and 4.2±01.2 mb, respectively. Neither initial- nor final-state interactions appear to be major contributors to the observed three-body absorption, though initial-state interactions may be contributing to the enhancement of the three-body + absorption at the resonance.

Original language	English
Pages (from-to)	957-972
Number of pages	16
Journal	Physical Review C - Nuclear Physics
Volume	43
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.43.957
State	Published - 1991

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Mukhopadhyay, S., Levenson, S., Segel, R. E., Garino, G., Geesaman, D., Schiffer, J. P., Stephans, G., Zeidman, B., Ungricht, E., Jackson, H., Kowalczyk, R., Ashery, D., Piasetsky, E., Moinester, M., Navon, I., Smith, L. C., Minehart, R. C., Das, G. S., Whitney, R. R., ... Watson, J. (1991). Pion absorption by He3 at the Δ resonance energy. Physical Review C - Nuclear Physics, 43(3), 957-972. https://doi.org/10.1103/PhysRevC.43.957

@article{7efcbe08281e4a1e9e2586fdcddfb3a0,

title = "Pion absorption by He3 at the Δ resonance energy",

abstract = "Pion absorption by He3 was studied at T=165 MeV in a kinematically complete experiment. The cross section for absorption on a (pn) pair of nucleons, pn(+), was found to be 17.0±2.6 mb; that for absorption on a (pp) pair, pp(-), 0.91±0.20 mb. The angular distribution in the NN center-of-mass system for pn(+) resembles that for the ++dp+p reaction while the angular distribution for pp(-) is strongly backward peaked. Evidence that a significant fraction of the absorptions involves all three target nucleons is seen in the angular correlation between the two detected nucleons as well as in the momentum distribution of the unobserved nucleon. For + and - absorption, the three-body cross sections were found to be 9.6±2.1 and 4.2±01.2 mb, respectively. Neither initial- nor final-state interactions appear to be major contributors to the observed three-body absorption, though initial-state interactions may be contributing to the enhancement of the three-body + absorption at the resonance.",

author = "S. Mukhopadhyay and S. Levenson and Segel, {R. E.} and G. Garino and D. Geesaman and Schiffer, {J. P.} and G. Stephans and B. Zeidman and E. Ungricht and H. Jackson and R. Kowalczyk and D. Ashery and E. Piasetsky and M. Moinester and I. Navon and Smith, {L. C.} and Minehart, {R. C.} and Das, {G. S.} and Whitney, {R. R.} and R. McKeown and B. Anderson and R. Madey and J. Watson",

year = "1991",

doi = "10.1103/PhysRevC.43.957",

language = "אנגלית",

volume = "43",

pages = "957--972",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

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Mukhopadhyay, S, Levenson, S, Segel, RE, Garino, G, Geesaman, D, Schiffer, JP, Stephans, G, Zeidman, B, Ungricht, E, Jackson, H, Kowalczyk, R, Ashery, D, Piasetsky, E, Moinester, M, Navon, I, Smith, LC, Minehart, RC, Das, GS, Whitney, RR, McKeown, R, Anderson, B, Madey, R & Watson, J 1991, 'Pion absorption by He3 at the Δ resonance energy', Physical Review C - Nuclear Physics, vol. 43, no. 3, pp. 957-972. https://doi.org/10.1103/PhysRevC.43.957

TY - JOUR

T1 - Pion absorption by He3 at the Δ resonance energy

AU - Mukhopadhyay, S.

AU - Levenson, S.

AU - Segel, R. E.

AU - Garino, G.

AU - Geesaman, D.

AU - Schiffer, J. P.

AU - Stephans, G.

AU - Zeidman, B.

AU - Ungricht, E.

AU - Jackson, H.

AU - Kowalczyk, R.

AU - Ashery, D.

AU - Piasetsky, E.

AU - Moinester, M.

AU - Navon, I.

AU - Smith, L. C.

AU - Minehart, R. C.

AU - Das, G. S.

AU - Whitney, R. R.

AU - McKeown, R.

AU - Anderson, B.

AU - Madey, R.

AU - Watson, J.

PY - 1991

Y1 - 1991

N2 - Pion absorption by He3 was studied at T=165 MeV in a kinematically complete experiment. The cross section for absorption on a (pn) pair of nucleons, pn(+), was found to be 17.0±2.6 mb; that for absorption on a (pp) pair, pp(-), 0.91±0.20 mb. The angular distribution in the NN center-of-mass system for pn(+) resembles that for the ++dp+p reaction while the angular distribution for pp(-) is strongly backward peaked. Evidence that a significant fraction of the absorptions involves all three target nucleons is seen in the angular correlation between the two detected nucleons as well as in the momentum distribution of the unobserved nucleon. For + and - absorption, the three-body cross sections were found to be 9.6±2.1 and 4.2±01.2 mb, respectively. Neither initial- nor final-state interactions appear to be major contributors to the observed three-body absorption, though initial-state interactions may be contributing to the enhancement of the three-body + absorption at the resonance.

AB - Pion absorption by He3 was studied at T=165 MeV in a kinematically complete experiment. The cross section for absorption on a (pn) pair of nucleons, pn(+), was found to be 17.0±2.6 mb; that for absorption on a (pp) pair, pp(-), 0.91±0.20 mb. The angular distribution in the NN center-of-mass system for pn(+) resembles that for the ++dp+p reaction while the angular distribution for pp(-) is strongly backward peaked. Evidence that a significant fraction of the absorptions involves all three target nucleons is seen in the angular correlation between the two detected nucleons as well as in the momentum distribution of the unobserved nucleon. For + and - absorption, the three-body cross sections were found to be 9.6±2.1 and 4.2±01.2 mb, respectively. Neither initial- nor final-state interactions appear to be major contributors to the observed three-body absorption, though initial-state interactions may be contributing to the enhancement of the three-body + absorption at the resonance.

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U2 - 10.1103/PhysRevC.43.957

DO - 10.1103/PhysRevC.43.957

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AN - SCOPUS:0000282080

SN - 0556-2813

VL - 43

SP - 957

EP - 972

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 3

ER -

Pion absorption by He3 at the Δ resonance energy

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