Study of the ηc(1 1S0) state of charmonium formed in p̄p annihilations and a search for the ηc′(2 1S0)

T. A. Armstrong; D. Bettoni; V. Bharadwaj; C. Biino; G. Blanford; G. Borreani; D. Broemmelsiek; A. Buzzo; R. Calabrese; A. Ceccucci; R. Cester; M. Church; P. Dalpiaz; P. F. Dalpiaz; D. Dimitroyannis; M. Fabbri; J. Fast; A. Gianoli; C. M. Ginsburg; K. Gollwitzer; G. Govi; A. Hahn; M. Hasan; S. Hsueh; R. Lewis; E. Luppi; M. MacRí; A. M. Majewska; M. Mandelkern; F. Marchetto; M. Marinelli; J. Marques; W. Marsh; M. Martini; M. Masuzawa; E. Menichetti; A. Migliori; R. Mussa; S. Palestini; M. Pallavicini; S. Passaggio; N. Pastrone; C. Patrignani; J. Peoples; F. Petrucci; M. G. Pia; S. Pordes; P. Rapidis; R. Ray; J. Reid; G. Rinaudo; B. Roccuzzo; J. Rosen; A. Santroni; M. Sarmiento; M. Savrré; J. Schultz; K. K. Seth; A. Smith; G. A. Smith; M. Sozzi; S. Trokenheim; M. F. Weber; S. Werkema; Y. Zhang; J. Zhao; G. Zioulas

doi:10.1103/PhysRevD.52.4839

Study of the ηc(1 1S0) state of charmonium formed in p̄p annihilations and a search for the ηc′(2 1S0)

T. A. Armstrong^*, D. Bettoni, V. Bharadwaj, C. Biino, G. Blanford, G. Borreani, D. Broemmelsiek, A. Buzzo, R. Calabrese, A. Ceccucci, R. Cester, M. Church, P. Dalpiaz, P. F. Dalpiaz, D. Dimitroyannis, M. Fabbri, J. Fast, A. Gianoli, C. M. Ginsburg, K. GollwitzerG. Govi, A. Hahn, M. Hasan, S. Hsueh, R. Lewis, E. Luppi, M. MacRí, A. M. Majewska, M. Mandelkern, F. Marchetto, M. Marinelli, J. Marques, W. Marsh, M. Martini, M. Masuzawa, E. Menichetti, A. Migliori, R. Mussa, S. Palestini, M. Pallavicini, S. Passaggio, N. Pastrone, C. Patrignani, J. Peoples, F. Petrucci, M. G. Pia, S. Pordes, P. Rapidis, R. Ray, J. Reid, G. Rinaudo, B. Roccuzzo, J. Rosen, A. Santroni, M. Sarmiento, M. Savrré, J. Schultz, K. K. Seth, A. Smith, G. A. Smith, M. Sozzi, S. Trokenheim, M. F. Weber, S. Werkema, Y. Zhang, J. Zhao, G. Zioulas

^*Corresponding author for this work

Physics and Astronomy

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

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Abstract

The E760 Collaboration performed an experiment in the Antiproton Accumulator at Fermilab to study the two photon decay of the ηc(1 1S0) charmonium state formed in p̄p annihilations. This resulted in a new measurement of the mass Mηc=2988.3-3.1+3.3 MeV/c2 and of the product B(ηc→p̄p)×Γ(ηc→γγ) =(8.1-2.0+2.9) eV. We performed a search for the process p̄p→ηc′(2 1S0)→γγ over a limited range of center-of-mass energies. Since no signal was observed, we derived upper limits on the product of branching ratios B(ηc′→p̄p)×B(ηc′→γγ) in the center-of-mass energy range 3584≤ s ≤3624 MeV. We observed no signal for the nonresonant process p̄+p→γ+γ and obtain upper limits.

Original language	English (US)
Pages (from-to)	4839-4854
Number of pages	16
Journal	Physical Review D
Volume	52
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.52.4839
State	Published - 1995

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevD.52.4839

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Armstrong, T. A., Bettoni, D., Bharadwaj, V., Biino, C., Blanford, G., Borreani, G., Broemmelsiek, D., Buzzo, A., Calabrese, R., Ceccucci, A., Cester, R., Church, M., Dalpiaz, P., Dalpiaz, P. F., Dimitroyannis, D., Fabbri, M., Fast, J., Gianoli, A., Ginsburg, C. M., ... Zioulas, G. (1995). Study of the ηc(1 1S0) state of charmonium formed in p̄p annihilations and a search for the ηc′(2 1S0). Physical Review D, 52(9), 4839-4854. https://doi.org/10.1103/PhysRevD.52.4839

@article{93f75ae04ae04d7fbb02881a4e3ee939,

title = "Study of the ηc(1 1S0) state of charmonium formed in {\=p}p annihilations and a search for the ηc′(2 1S0)",

abstract = "The E760 Collaboration performed an experiment in the Antiproton Accumulator at Fermilab to study the two photon decay of the ηc(1 1S0) charmonium state formed in {\=p}p annihilations. This resulted in a new measurement of the mass Mηc=2988.3-3.1+3.3 MeV/c2 and of the product B(ηc→{\=p}p)×Γ(ηc→γγ) =(8.1-2.0+2.9) eV. We performed a search for the process {\=p}p→ηc′(2 1S0)→γγ over a limited range of center-of-mass energies. Since no signal was observed, we derived upper limits on the product of branching ratios B(ηc′→{\=p}p)×B(ηc′→γγ) in the center-of-mass energy range 3584≤ s ≤3624 MeV. We observed no signal for the nonresonant process {\=p}+p→γ+γ and obtain upper limits.",

author = "Armstrong, {T. A.} and D. Bettoni and V. Bharadwaj and C. Biino and G. Blanford and G. Borreani and D. Broemmelsiek and A. Buzzo and R. Calabrese and A. Ceccucci and R. Cester and M. Church and P. Dalpiaz and Dalpiaz, {P. F.} and D. Dimitroyannis and M. Fabbri and J. Fast and A. Gianoli and Ginsburg, {C. M.} and K. Gollwitzer and G. Govi and A. Hahn and M. Hasan and S. Hsueh and R. Lewis and E. Luppi and M. MacR{\'i} and Majewska, {A. M.} and M. Mandelkern and F. Marchetto and M. Marinelli and J. Marques and W. Marsh and M. Martini and M. Masuzawa and E. Menichetti and A. Migliori and R. Mussa and S. Palestini and M. Pallavicini and S. Passaggio and N. Pastrone and C. Patrignani and J. Peoples and F. Petrucci and Pia, {M. G.} and S. Pordes and P. Rapidis and R. Ray and J. Reid and G. Rinaudo and B. Roccuzzo and J. Rosen and A. Santroni and M. Sarmiento and M. Savrr{\'e} and J. Schultz and Seth, {K. K.} and A. Smith and Smith, {G. A.} and M. Sozzi and S. Trokenheim and Weber, {M. F.} and S. Werkema and Y. Zhang and J. Zhao and G. Zioulas",

year = "1995",

doi = "10.1103/PhysRevD.52.4839",

language = "English (US)",

volume = "52",

pages = "4839--4854",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics",

number = "9",

}

Armstrong, TA, Bettoni, D, Bharadwaj, V, Biino, C, Blanford, G, Borreani, G, Broemmelsiek, D, Buzzo, A, Calabrese, R, Ceccucci, A, Cester, R, Church, M, Dalpiaz, P, Dalpiaz, PF, Dimitroyannis, D, Fabbri, M, Fast, J, Gianoli, A, Ginsburg, CM, Gollwitzer, K, Govi, G, Hahn, A, Hasan, M, Hsueh, S, Lewis, R, Luppi, E, MacRí, M, Majewska, AM, Mandelkern, M, Marchetto, F, Marinelli, M, Marques, J, Marsh, W, Martini, M, Masuzawa, M, Menichetti, E, Migliori, A, Mussa, R, Palestini, S, Pallavicini, M, Passaggio, S, Pastrone, N, Patrignani, C, Peoples, J, Petrucci, F, Pia, MG, Pordes, S, Rapidis, P, Ray, R, Reid, J, Rinaudo, G, Roccuzzo, B, Rosen, J, Santroni, A, Sarmiento, M, Savrré, M, Schultz, J, Seth, KK, Smith, A, Smith, GA, Sozzi, M, Trokenheim, S, Weber, MF, Werkema, S, Zhang, Y, Zhao, J & Zioulas, G 1995, 'Study of the ηc(1 1S0) state of charmonium formed in p̄p annihilations and a search for the ηc′(2 1S0)', Physical Review D, vol. 52, no. 9, pp. 4839-4854. https://doi.org/10.1103/PhysRevD.52.4839

TY - JOUR

T1 - Study of the ηc(1 1S0) state of charmonium formed in p̄p annihilations and a search for the ηc′(2 1S0)

AU - Armstrong, T. A.

AU - Bettoni, D.

AU - Bharadwaj, V.

AU - Biino, C.

AU - Blanford, G.

AU - Borreani, G.

AU - Broemmelsiek, D.

AU - Buzzo, A.

AU - Calabrese, R.

AU - Ceccucci, A.

AU - Cester, R.

AU - Church, M.

AU - Dalpiaz, P.

AU - Dalpiaz, P. F.

AU - Dimitroyannis, D.

AU - Fabbri, M.

AU - Fast, J.

AU - Gianoli, A.

AU - Ginsburg, C. M.

AU - Gollwitzer, K.

AU - Govi, G.

AU - Hahn, A.

AU - Hasan, M.

AU - Hsueh, S.

AU - Lewis, R.

AU - Luppi, E.

AU - MacRí, M.

AU - Majewska, A. M.

AU - Mandelkern, M.

AU - Marchetto, F.

AU - Marinelli, M.

AU - Marques, J.

AU - Marsh, W.

AU - Martini, M.

AU - Masuzawa, M.

AU - Menichetti, E.

AU - Migliori, A.

AU - Mussa, R.

AU - Palestini, S.

AU - Pallavicini, M.

AU - Passaggio, S.

AU - Pastrone, N.

AU - Patrignani, C.

AU - Peoples, J.

AU - Petrucci, F.

AU - Pia, M. G.

AU - Pordes, S.

AU - Rapidis, P.

AU - Ray, R.

AU - Reid, J.

AU - Rinaudo, G.

AU - Roccuzzo, B.

AU - Rosen, J.

AU - Santroni, A.

AU - Sarmiento, M.

AU - Savrré, M.

AU - Schultz, J.

AU - Seth, K. K.

AU - Smith, A.

AU - Smith, G. A.

AU - Sozzi, M.

AU - Trokenheim, S.

AU - Weber, M. F.

AU - Werkema, S.

AU - Zhang, Y.

AU - Zhao, J.

AU - Zioulas, G.

PY - 1995

Y1 - 1995

N2 - The E760 Collaboration performed an experiment in the Antiproton Accumulator at Fermilab to study the two photon decay of the ηc(1 1S0) charmonium state formed in p̄p annihilations. This resulted in a new measurement of the mass Mηc=2988.3-3.1+3.3 MeV/c2 and of the product B(ηc→p̄p)×Γ(ηc→γγ) =(8.1-2.0+2.9) eV. We performed a search for the process p̄p→ηc′(2 1S0)→γγ over a limited range of center-of-mass energies. Since no signal was observed, we derived upper limits on the product of branching ratios B(ηc′→p̄p)×B(ηc′→γγ) in the center-of-mass energy range 3584≤ s ≤3624 MeV. We observed no signal for the nonresonant process p̄+p→γ+γ and obtain upper limits.

AB - The E760 Collaboration performed an experiment in the Antiproton Accumulator at Fermilab to study the two photon decay of the ηc(1 1S0) charmonium state formed in p̄p annihilations. This resulted in a new measurement of the mass Mηc=2988.3-3.1+3.3 MeV/c2 and of the product B(ηc→p̄p)×Γ(ηc→γγ) =(8.1-2.0+2.9) eV. We performed a search for the process p̄p→ηc′(2 1S0)→γγ over a limited range of center-of-mass energies. Since no signal was observed, we derived upper limits on the product of branching ratios B(ηc′→p̄p)×B(ηc′→γγ) in the center-of-mass energy range 3584≤ s ≤3624 MeV. We observed no signal for the nonresonant process p̄+p→γ+γ and obtain upper limits.

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UR - http://www.scopus.com/inward/citedby.url?scp=33751349428&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.52.4839

DO - 10.1103/PhysRevD.52.4839

M3 - Article

AN - SCOPUS:33751349428

SN - 0556-2821

VL - 52

SP - 4839

EP - 4854

JO - Physical Review D

JF - Physical Review D

IS - 9

ER -

Study of the ηc(1 1S0) state of charmonium formed in p̄p annihilations and a search for the ηc′(2 1S0)

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