The total neutral energy spectra in the central region of α-α, d-d and p-p interactions at sNN = 31 GeV per nucleon pair at the CERN ISR

A. L.S. Angelis; G. Basini; H. J. Besch; R. E. Breedon; L. Camilleri; T. J. Chapin; C. Chasman; R. L. Cool; P. T. Cox; Ch Von Gagern; C. Grosso-Pilcher; D. S. Hanna; P. E. Haustein; B. M. Humphries; J. T. Linnemann; C. B. Newman-Holmes; R. B. Nickerson; J. W. Olness; N. Phinney; B. G. Pope; S. H. Pordes; K. J. Powell; R. W. Rusack; C. W. Salgado; A. M. Segar; S. R. Stampke; M. Tanaka; M. J. Tannenbaum; P. Thieberger; J. M. Yelton

doi:10.1016/0370-2693(84)90577-X

The total neutral energy spectra in the central region of α-α, d-d and p-p interactions at s_NN = 31 GeV per nucleon pair at the CERN ISR

A. L.S. Angelis, G. Basini, H. J. Besch, R. E. Breedon, L. Camilleri, T. J. Chapin, C. Chasman, R. L. Cool, P. T. Cox, Ch Von Gagern, C. Grosso-Pilcher, D. S. Hanna, P. E. Haustein, B. M. Humphries, J. T. Linnemann, C. B. Newman-Holmes, R. B. Nickerson, J. W. Olness, N. Phinney, B. G. PopeS. H. Pordes, K. J. Powell, R. W. Rusack, C. W. Salgado, A. M. Segar, S. R. Stampke, M. Tanaka, M. J. Tannenbaum, P. Thieberger, J. M. Yelton

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The spectra in total neutral energy, E^TOT0, have been measured in pp, dd and αα collisions at centre-of-mass energy per nucleon pair, s_NN, of 31 GeV. The range in E_TOT⁰ covered was 1 to 19 GeV in pp, 18 to 24 GeV in dd and 1 to 34 GeV in αα interactions. The ratio of the αα to the pp spectra rises monotonically from 7 at E_TOT⁰ = 1.5 GeV to 10⁵ at E_TOT⁰ = 19 GeV. Since E_TOT⁰ is the sum over many particles in the detector, it is directly sensitive to multiple nucleon-nucleon collisions in the interacting α particles. The αα spectrum in the range 8 < E_TOT⁰ < 17 GeV is consistent with being described by a simple model of 4 simultaneous nucleon-nucleon collisions with a cross section about equal to 10% of the observed αα interaction cross section. The spectrum of E_TOT⁰ above 17 GeV is even flatter than this extreme case where four nucleon pairs are interacting.

Original language	English (US)
Pages (from-to)	140-144
Number of pages	5
Journal	Physics Letters B
Volume	141
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(84)90577-X
State	Published - Jun 21 1984

Bibliographical note

Funding Information:
We wish to thank the ISR division for the superb performance of the ISR, Robert Gros for his excellent technical help and Marie-Ann Huber for her painstaking secretarial and data reduction duties. The assistance of Keith Potter and Alasdair M. Smith of the ES group is gratefully acknowledged. Ernst Appel and Bernard Pirollet were invaluable at keeping the cryogenics of the solenoid operative. This research has been supported in part by the U.S. Department of Energy under Contract DE-AC02-76CH00016.

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Angelis, A. L. S., Basini, G., Besch, H. J., Breedon, R. E., Camilleri, L., Chapin, T. J., Chasman, C., Cool, R. L., Cox, P. T., Von Gagern, C., Grosso-Pilcher, C., Hanna, D. S., Haustein, P. E., Humphries, B. M., Linnemann, J. T., Newman-Holmes, C. B., Nickerson, R. B., Olness, J. W., Phinney, N., ... Yelton, J. M. (1984). The total neutral energy spectra in the central region of α-α, d-d and p-p interactions at s_NN = 31 GeV per nucleon pair at the CERN ISR. Physics Letters B, 141(1-2), 140-144. https://doi.org/10.1016/0370-2693(84)90577-X

Angelis, ALS, Basini, G, Besch, HJ, Breedon, RE, Camilleri, L, Chapin, TJ, Chasman, C, Cool, RL, Cox, PT, Von Gagern, C, Grosso-Pilcher, C, Hanna, DS, Haustein, PE, Humphries, BM, Linnemann, JT, Newman-Holmes, CB, Nickerson, RB, Olness, JW, Phinney, N, Pope, BG, Pordes, SH, Powell, KJ, Rusack, RW, Salgado, CW, Segar, AM, Stampke, SR, Tanaka, M, Tannenbaum, MJ, Thieberger, P & Yelton, JM 1984, 'The total neutral energy spectra in the central region of α-α, d-d and p-p interactions at s_NN = 31 GeV per nucleon pair at the CERN ISR', Physics Letters B, vol. 141, no. 1-2, pp. 140-144. https://doi.org/10.1016/0370-2693(84)90577-X

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title = "The total neutral energy spectra in the central region of α-α, d-d and p-p interactions at sNN = 31 GeV per nucleon pair at the CERN ISR",

abstract = "The spectra in total neutral energy, ETOT0, have been measured in pp, dd and αα collisions at centre-of-mass energy per nucleon pair, sNN, of 31 GeV. The range in ETOT0 covered was 1 to 19 GeV in pp, 18 to 24 GeV in dd and 1 to 34 GeV in αα interactions. The ratio of the αα to the pp spectra rises monotonically from 7 at ETOT0 = 1.5 GeV to 105 at ETOT 0 = 19 GeV. Since ETOT0 is the sum over many particles in the detector, it is directly sensitive to multiple nucleon-nucleon collisions in the interacting α particles. The αα spectrum in the range 8 < ETOT0 < 17 GeV is consistent with being described by a simple model of 4 simultaneous nucleon-nucleon collisions with a cross section about equal to 10% of the observed αα interaction cross section. The spectrum of ETOT0 above 17 GeV is even flatter than this extreme case where four nucleon pairs are interacting.",

author = "Angelis, {A. L.S.} and G. Basini and Besch, {H. J.} and Breedon, {R. E.} and L. Camilleri and Chapin, {T. J.} and C. Chasman and Cool, {R. L.} and Cox, {P. T.} and {Von Gagern}, Ch and C. Grosso-Pilcher and Hanna, {D. S.} and Haustein, {P. E.} and Humphries, {B. M.} and Linnemann, {J. T.} and Newman-Holmes, {C. B.} and Nickerson, {R. B.} and Olness, {J. W.} and N. Phinney and Pope, {B. G.} and Pordes, {S. H.} and Powell, {K. J.} and Rusack, {R. W.} and Salgado, {C. W.} and Segar, {A. M.} and Stampke, {S. R.} and M. Tanaka and Tannenbaum, {M. J.} and P. Thieberger and Yelton, {J. M.}",

note = "Funding Information: We wish to thank the ISR division for the superb performance of the ISR, Robert Gros for his excellent technical help and Marie-Ann Huber for her painstaking secretarial and data reduction duties. The assistance of Keith Potter and Alasdair M. Smith of the ES group is gratefully acknowledged. Ernst Appel and Bernard Pirollet were invaluable at keeping the cryogenics of the solenoid operative. This research has been supported in part by the U.S. Department of Energy under Contract DE-AC02-76CH00016.",

year = "1984",

month = jun,

day = "21",

doi = "10.1016/0370-2693(84)90577-X",

language = "English (US)",

volume = "141",

pages = "140--144",

journal = "Physics Letters B",

issn = "0370-2693",

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TY - JOUR

T1 - The total neutral energy spectra in the central region of α-α, d-d and p-p interactions at sNN = 31 GeV per nucleon pair at the CERN ISR

AU - Angelis, A. L.S.

AU - Basini, G.

AU - Besch, H. J.

AU - Breedon, R. E.

AU - Camilleri, L.

AU - Chapin, T. J.

AU - Chasman, C.

AU - Cool, R. L.

AU - Cox, P. T.

AU - Von Gagern, Ch

AU - Grosso-Pilcher, C.

AU - Hanna, D. S.

AU - Haustein, P. E.

AU - Humphries, B. M.

AU - Linnemann, J. T.

AU - Newman-Holmes, C. B.

AU - Nickerson, R. B.

AU - Olness, J. W.

AU - Phinney, N.

AU - Pope, B. G.

AU - Pordes, S. H.

AU - Powell, K. J.

AU - Rusack, R. W.

AU - Salgado, C. W.

AU - Segar, A. M.

AU - Stampke, S. R.

AU - Tanaka, M.

AU - Tannenbaum, M. J.

AU - Thieberger, P.

AU - Yelton, J. M.

N1 - Funding Information: We wish to thank the ISR division for the superb performance of the ISR, Robert Gros for his excellent technical help and Marie-Ann Huber for her painstaking secretarial and data reduction duties. The assistance of Keith Potter and Alasdair M. Smith of the ES group is gratefully acknowledged. Ernst Appel and Bernard Pirollet were invaluable at keeping the cryogenics of the solenoid operative. This research has been supported in part by the U.S. Department of Energy under Contract DE-AC02-76CH00016.

PY - 1984/6/21

Y1 - 1984/6/21

N2 - The spectra in total neutral energy, ETOT0, have been measured in pp, dd and αα collisions at centre-of-mass energy per nucleon pair, sNN, of 31 GeV. The range in ETOT0 covered was 1 to 19 GeV in pp, 18 to 24 GeV in dd and 1 to 34 GeV in αα interactions. The ratio of the αα to the pp spectra rises monotonically from 7 at ETOT0 = 1.5 GeV to 105 at ETOT 0 = 19 GeV. Since ETOT0 is the sum over many particles in the detector, it is directly sensitive to multiple nucleon-nucleon collisions in the interacting α particles. The αα spectrum in the range 8 < ETOT0 < 17 GeV is consistent with being described by a simple model of 4 simultaneous nucleon-nucleon collisions with a cross section about equal to 10% of the observed αα interaction cross section. The spectrum of ETOT0 above 17 GeV is even flatter than this extreme case where four nucleon pairs are interacting.

AB - The spectra in total neutral energy, ETOT0, have been measured in pp, dd and αα collisions at centre-of-mass energy per nucleon pair, sNN, of 31 GeV. The range in ETOT0 covered was 1 to 19 GeV in pp, 18 to 24 GeV in dd and 1 to 34 GeV in αα interactions. The ratio of the αα to the pp spectra rises monotonically from 7 at ETOT0 = 1.5 GeV to 105 at ETOT 0 = 19 GeV. Since ETOT0 is the sum over many particles in the detector, it is directly sensitive to multiple nucleon-nucleon collisions in the interacting α particles. The αα spectrum in the range 8 < ETOT0 < 17 GeV is consistent with being described by a simple model of 4 simultaneous nucleon-nucleon collisions with a cross section about equal to 10% of the observed αα interaction cross section. The spectrum of ETOT0 above 17 GeV is even flatter than this extreme case where four nucleon pairs are interacting.

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