Measurement of the resonance parameters of the X1 (13P1) and X2 (13P2) states of charmonium formed in antiproton-proton annihilations

M. Andreotti; S. Bagnasco; W. Baldini; D. Bettoni; G. Borreani; A. Buzzo; R. Calabrese; R. Cester; G. Cibinetto; P. Dalpiaz; G. Garzoglio; K. E. Gollwitzer; M. Graham; M. Hu; D. Joffe; J. Kasper; G. Lasio; M. Lo Vetere; E. Luppi; M. Macrì; Mark Mandelkern; F. Marchetto; M. Marinelli; E. Menichetti; Z. Metreveli; R. Mussa; M. Negrini; M. M. Obertino; M. Pallavicini; N. Pastrone; C. Patrignani; S. Pordes; E. Robutti; W. Roethel; J. Rosen; P. Rumerio; R. W. Rusack; A. Santroni; J. Schultz; S. H. Seo; K. K. Seth; G. Stancari; M. Stancari; A. Tomaradze; I. Uman; T. Vidnovic; S. Werkema; P. Zweber

doi:10.1016/j.nuclphysb.2005.03.042

Measurement of the resonance parameters of the _X1 (1³P₁) and _X2 (1³P₂) states of charmonium formed in antiproton-proton annihilations

M. Andreotti, S. Bagnasco, W. Baldini, D. Bettoni, G. Borreani, A. Buzzo, R. Calabrese, R. Cester, G. Cibinetto, P. Dalpiaz, G. Garzoglio, K. E. Gollwitzer, M. Graham, M. Hu, D. Joffe, J. Kasper, G. Lasio, M. Lo Vetere, E. Luppi, M. MacrìMark Mandelkern, F. Marchetto, M. Marinelli, E. Menichetti, Z. Metreveli, R. Mussa, M. Negrini, M. M. Obertino, M. Pallavicini, N. Pastrone, C. Patrignani, S. Pordes, E. Robutti, W. Roethel, J. Rosen, P. Rumerio, R. W. Rusack, A. Santroni, J. Schultz, S. H. Seo, K. K. Seth, G. Stancari, M. Stancari, A. Tomaradze, I. Uman, T. Vidnovic, S. Werkema, P. Zweber

Physics and Astronomy (Twin Cities)

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

19 Scopus citations

Abstract

We have studied the ³P_J (χ_c) states of charmonium in formation by antiproton-proton annihilations in experiment E835 at the Fermi lab Antiproton Source. We report new measurements of the mass, width, and B(_χcJ → p̄p) Γ (_χcJ → J/ψ + anything) for the _χc1 and _χc2 by means of the inclusive reaction p̄p → _χcJ → J/ψ + anything → (e⁺e^-) + anything. Using the subsample of events where _χcJ → γ + (e⁺e^-) is fully reconstructed, we derive B(_χcJ → p̄p) Γ (_χcJ → J/ψ + γ). We summarize the results of the E760 (updated) and E835 measurements of mass, width and B (_χcJ → p̄p) Γ (_χcJ → J/ψ + γ) (J = 0, 1, 2) and discuss the significance of these measurements.

Original language	English (US)
Pages (from-to)	34-47
Number of pages	14
Journal	Nuclear Physics B
Volume	717
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nuclphysb.2005.03.042
State	Published - Jun 20 2005

Bibliographical note

Funding Information:
We gratefully acknowledge the support of the Fermilab staff and technicians and especially the Antiproton Source Department of the Accelerator Division and the On-Line Department of the Computing Division. We wish to thank also the INFN and university technicians and engineers from Ferrara, Genova, Torino and Northwestern for the valuable work done. This research was supported by the Italian Istituto Nazionale di Fisica Nucleare (INFN) and US Department of Energy.

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10.1016/j.nuclphysb.2005.03.042

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Andreotti, M., Bagnasco, S., Baldini, W., Bettoni, D., Borreani, G., Buzzo, A., Calabrese, R., Cester, R., Cibinetto, G., Dalpiaz, P., Garzoglio, G., Gollwitzer, K. E., Graham, M., Hu, M., Joffe, D., Kasper, J., Lasio, G., Lo Vetere, M., Luppi, E., ... Zweber, P. (2005). Measurement of the resonance parameters of the _X1 (1³P₁) and _X2 (1³P₂) states of charmonium formed in antiproton-proton annihilations. Nuclear Physics B, 717(1-2), 34-47. https://doi.org/10.1016/j.nuclphysb.2005.03.042

Andreotti, M, Bagnasco, S, Baldini, W, Bettoni, D, Borreani, G, Buzzo, A, Calabrese, R, Cester, R, Cibinetto, G, Dalpiaz, P, Garzoglio, G, Gollwitzer, KE, Graham, M, Hu, M, Joffe, D, Kasper, J, Lasio, G, Lo Vetere, M, Luppi, E, Macrì, M, Mandelkern, M, Marchetto, F, Marinelli, M, Menichetti, E, Metreveli, Z, Mussa, R, Negrini, M, Obertino, MM, Pallavicini, M, Pastrone, N, Patrignani, C, Pordes, S, Robutti, E, Roethel, W, Rosen, J, Rumerio, P, Rusack, RW, Santroni, A, Schultz, J, Seo, SH, Seth, KK, Stancari, G, Stancari, M, Tomaradze, A, Uman, I, Vidnovic, T, Werkema, S & Zweber, P 2005, 'Measurement of the resonance parameters of the _X1 (1³P₁) and _X2 (1³P₂) states of charmonium formed in antiproton-proton annihilations', Nuclear Physics B, vol. 717, no. 1-2, pp. 34-47. https://doi.org/10.1016/j.nuclphysb.2005.03.042

@article{fd9b6e4ad6634746b6e996bd1587de6a,

title = "Measurement of the resonance parameters of the X1 (13P1) and X2 (13P2) states of charmonium formed in antiproton-proton annihilations",

abstract = "We have studied the 3PJ (χc) states of charmonium in formation by antiproton-proton annihilations in experiment E835 at the Fermi lab Antiproton Source. We report new measurements of the mass, width, and B(χcJ → {\=p}p) Γ (χcJ → J/ψ + anything) for the χc1 and χc2 by means of the inclusive reaction {\=p}p → χcJ → J/ψ + anything → (e+e-) + anything. Using the subsample of events where χcJ → γ + (e+e-) is fully reconstructed, we derive B(χcJ → {\=p}p) Γ (χcJ → J/ψ + γ). We summarize the results of the E760 (updated) and E835 measurements of mass, width and B (χcJ → {\=p}p) Γ (χcJ → J/ψ + γ) (J = 0, 1, 2) and discuss the significance of these measurements.",

author = "M. Andreotti and S. Bagnasco and W. Baldini and D. Bettoni and G. Borreani and A. Buzzo and R. Calabrese and R. Cester and G. Cibinetto and P. Dalpiaz and G. Garzoglio and Gollwitzer, {K. E.} and M. Graham and M. Hu and D. Joffe and J. Kasper and G. Lasio and {Lo Vetere}, M. and E. Luppi and M. Macr{\`i} and Mark Mandelkern and F. Marchetto and M. Marinelli and E. Menichetti and Z. Metreveli and R. Mussa and M. Negrini and Obertino, {M. M.} and M. Pallavicini and N. Pastrone and C. Patrignani and S. Pordes and E. Robutti and W. Roethel and J. Rosen and P. Rumerio and Rusack, {R. W.} and A. Santroni and J. Schultz and Seo, {S. H.} and Seth, {K. K.} and G. Stancari and M. Stancari and A. Tomaradze and I. Uman and T. Vidnovic and S. Werkema and P. Zweber",

note = "Funding Information: We gratefully acknowledge the support of the Fermilab staff and technicians and especially the Antiproton Source Department of the Accelerator Division and the On-Line Department of the Computing Division. We wish to thank also the INFN and university technicians and engineers from Ferrara, Genova, Torino and Northwestern for the valuable work done. This research was supported by the Italian Istituto Nazionale di Fisica Nucleare (INFN) and US Department of Energy. ",

year = "2005",

month = jun,

day = "20",

doi = "10.1016/j.nuclphysb.2005.03.042",

language = "English (US)",

volume = "717",

pages = "34--47",

journal = "Nuclear Physics B",

issn = "0550-3213",

publisher = "Elsevier",

number = "1-2",

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TY - JOUR

T1 - Measurement of the resonance parameters of the X1 (13P1) and X2 (13P2) states of charmonium formed in antiproton-proton annihilations

AU - Andreotti, M.

AU - Bagnasco, S.

AU - Baldini, W.

AU - Bettoni, D.

AU - Borreani, G.

AU - Buzzo, A.

AU - Calabrese, R.

AU - Cester, R.

AU - Cibinetto, G.

AU - Dalpiaz, P.

AU - Garzoglio, G.

AU - Gollwitzer, K. E.

AU - Graham, M.

AU - Hu, M.

AU - Joffe, D.

AU - Kasper, J.

AU - Lasio, G.

AU - Lo Vetere, M.

AU - Luppi, E.

AU - Macrì, M.

AU - Mandelkern, Mark

AU - Marchetto, F.

AU - Marinelli, M.

AU - Menichetti, E.

AU - Metreveli, Z.

AU - Mussa, R.

AU - Negrini, M.

AU - Obertino, M. M.

AU - Pallavicini, M.

AU - Pastrone, N.

AU - Patrignani, C.

AU - Pordes, S.

AU - Robutti, E.

AU - Roethel, W.

AU - Rosen, J.

AU - Rumerio, P.

AU - Rusack, R. W.

AU - Santroni, A.

AU - Schultz, J.

AU - Seo, S. H.

AU - Seth, K. K.

AU - Stancari, G.

AU - Stancari, M.

AU - Tomaradze, A.

AU - Uman, I.

AU - Vidnovic, T.

AU - Werkema, S.

AU - Zweber, P.

N1 - Funding Information: We gratefully acknowledge the support of the Fermilab staff and technicians and especially the Antiproton Source Department of the Accelerator Division and the On-Line Department of the Computing Division. We wish to thank also the INFN and university technicians and engineers from Ferrara, Genova, Torino and Northwestern for the valuable work done. This research was supported by the Italian Istituto Nazionale di Fisica Nucleare (INFN) and US Department of Energy.

PY - 2005/6/20

Y1 - 2005/6/20

N2 - We have studied the 3PJ (χc) states of charmonium in formation by antiproton-proton annihilations in experiment E835 at the Fermi lab Antiproton Source. We report new measurements of the mass, width, and B(χcJ → p̄p) Γ (χcJ → J/ψ + anything) for the χc1 and χc2 by means of the inclusive reaction p̄p → χcJ → J/ψ + anything → (e+e-) + anything. Using the subsample of events where χcJ → γ + (e+e-) is fully reconstructed, we derive B(χcJ → p̄p) Γ (χcJ → J/ψ + γ). We summarize the results of the E760 (updated) and E835 measurements of mass, width and B (χcJ → p̄p) Γ (χcJ → J/ψ + γ) (J = 0, 1, 2) and discuss the significance of these measurements.

AB - We have studied the 3PJ (χc) states of charmonium in formation by antiproton-proton annihilations in experiment E835 at the Fermi lab Antiproton Source. We report new measurements of the mass, width, and B(χcJ → p̄p) Γ (χcJ → J/ψ + anything) for the χc1 and χc2 by means of the inclusive reaction p̄p → χcJ → J/ψ + anything → (e+e-) + anything. Using the subsample of events where χcJ → γ + (e+e-) is fully reconstructed, we derive B(χcJ → p̄p) Γ (χcJ → J/ψ + γ). We summarize the results of the E760 (updated) and E835 measurements of mass, width and B (χcJ → p̄p) Γ (χcJ → J/ψ + γ) (J = 0, 1, 2) and discuss the significance of these measurements.

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U2 - 10.1016/j.nuclphysb.2005.03.042

DO - 10.1016/j.nuclphysb.2005.03.042

M3 - Article

AN - SCOPUS:19044391188

SN - 0550-3213

VL - 717

SP - 34

EP - 47

JO - Nuclear Physics B

JF - Nuclear Physics B

IS - 1-2

ER -