Study of the χ1 and χ2 charmonium states formed in pp annihilations

T. A. Armstrong; D. Bettoni; V. Bharadwaj; C. Biino; G. Borreani; D. R. Broemmelsiek; A. Buzzo; R. Calabrese; A. Ceccucci; R. Cester; M. D. Church; P. Dalpiaz; M. Dameri; D. Dimitroyannis; M. Fabbri; J. E. Fast; S. Ferroni; M. Gee; C. M. Ginsburg; K. E. Gollwitzer; A. A. Hahn; M. A. Hasan; S. Y. Hsueh; R. A. Lewis; E. Luppi; M. Macrí; A. M. Majewska; M. A. Mandelkern; F. Marchetto; M. Marinelli; J. L. Marques; W. Marsh; M. Martini; M. Masuzawa; E. Menichetti; A. Migliori; R. Mussa; S. Palestini; N. Pastrone; C. Patrignani; J. Peoples; L. Pesando; F. Petrucci; M. G. Pia; S. Pordes; P. A. Rapidis; R. E. Ray; J. D. Reid; G. Rinaudo; J. L. Rosen; A. Santroni; M. Sarmiento; M. Savrié; J. Schultz; K. K. Seth; G. A. Smith; L. Tecchio; S. Tommasini; S. Trokenheim; M. F. Weber; S. J. Werkema; Y. Zhang; J. L. Zhao; G. Zioulas; M. Zito

doi:10.1016/0550-3213(92)90448-K

Study of the χ₁ and χ₂ charmonium states formed in pp annihilations

T. A. Armstrong^*, D. Bettoni, V. Bharadwaj, C. Biino, G. Borreani, D. R. Broemmelsiek, A. Buzzo, R. Calabrese, A. Ceccucci, R. Cester, M. D. Church, P. Dalpiaz, M. Dameri, D. Dimitroyannis, M. Fabbri, J. E. Fast, S. Ferroni, M. Gee, C. M. Ginsburg, K. E. GollwitzerA. A. Hahn, M. A. Hasan, S. Y. Hsueh, R. A. Lewis, E. Luppi, M. Macrí, A. M. Majewska, M. A. Mandelkern, F. Marchetto, M. Marinelli, J. L. Marques, W. Marsh, M. Martini, M. Masuzawa, E. Menichetti, A. Migliori, R. Mussa, S. Palestini, N. Pastrone, C. Patrignani, J. Peoples, L. Pesando, F. Petrucci, M. G. Pia, S. Pordes, P. A. Rapidis, R. E. Ray, J. D. Reid, G. Rinaudo, J. L. Rosen, A. Santroni, M. Sarmiento, M. Savrié, J. Schultz, K. K. Seth, G. A. Smith, L. Tecchio, S. Tommasini, S. Trokenheim, M. F. Weber, S. J. Werkema, Y. Zhang, J. L. Zhao, G. Zioulas, M. Zito

^*Corresponding author for this work

Physics and Astronomy

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

73 Scopus citations

Abstract

We report on a study of the χ₁(³P₁) and χ₂(³P₂) states of charmonium formed in antiproton-proton annihilations. An energy scan through the resonances, performed with a very narrow momentum-band beam of antiprotons intersecting a hydrogen jet target, enables us to perform very precise measurements of the mass and the total width of the two resonances. From a sample of 513 χ₁ and 585 χ₂ events we find M_χ1 = (3510.53±0.13) MeV/c², M_χ2 = (3556.15±0.14) MeV/c², Γ_χ1 = (0.88±0.14) MeV and Γ_χ2 = (1.98±0.18) MeV. From our measurement of the quantity Γ(R → pp) × BR(R → J ψ → e⁺ e^-), using known branching ratios, we obtain Λ(χ₁ → pp) = (69±13) eV and Λ(χ₂ → pp) = (180±31) eV.

Original language	English (US)
Pages (from-to)	35-54
Number of pages	20
Journal	Nuclear Physics, Section B
Volume	373
Issue number	1
DOIs	https://doi.org/10.1016/0550-3213(92)90448-K
State	Published - Mar 30 1992

Funding

The successful construction, integration and operation of the E760 detector was made possible by the dedicated technical support staffs from the collaborating institutions, whose superb effort we gratefully acknowledge. The crucial contribution of the Fermilab Accelerator Division Antiproton department is also gratefully acknowledged. This work was funded by the US Department of Energy and the National Science Foundation and by the Italian Istituto Nazionale di Fisica Nucleare.

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/0550-3213(92)90448-K

Cite this

Armstrong, T. A., Bettoni, D., Bharadwaj, V., Biino, C., Borreani, G., Broemmelsiek, D. R., Buzzo, A., Calabrese, R., Ceccucci, A., Cester, R., Church, M. D., Dalpiaz, P., Dameri, M., Dimitroyannis, D., Fabbri, M., Fast, J. E., Ferroni, S., Gee, M., Ginsburg, C. M., ... Zito, M. (1992). Study of the χ₁ and χ₂ charmonium states formed in pp annihilations. Nuclear Physics, Section B, 373(1), 35-54. https://doi.org/10.1016/0550-3213(92)90448-K

@article{be110f62d87249b199382ed21f3cabe8,

title = "Study of the χ1 and χ2 charmonium states formed in pp annihilations",

abstract = "We report on a study of the χ1(3P1) and χ2(3P2) states of charmonium formed in antiproton-proton annihilations. An energy scan through the resonances, performed with a very narrow momentum-band beam of antiprotons intersecting a hydrogen jet target, enables us to perform very precise measurements of the mass and the total width of the two resonances. From a sample of 513 χ1 and 585 χ2 events we find Mχ1 = (3510.53±0.13) MeV/c2, Mχ2 = (3556.15±0.14) MeV/c2, Γχ1 = (0.88±0.14) MeV and Γχ2 = (1.98±0.18) MeV. From our measurement of the quantity Γ(R → pp) × BR(R → J ψ → e+ e-), using known branching ratios, we obtain Λ(χ1 → pp) = (69±13) eV and Λ(χ2 → pp) = (180±31) eV.",

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

note = "Funding Information: The successful construction, integration and operation of the E760 detector was made possible by the dedicated technical support staffs from the collaborating institutions, whose superb effort we gratefully acknowledge. The crucial contribution of the Fermilab Accelerator Division Antiproton department is also gratefully acknowledged. This work was funded by the US Department of Energy and the National Science Foundation and by the Italian Istituto Nazionale di Fisica Nucleare.",

year = "1992",

month = mar,

day = "30",

doi = "10.1016/0550-3213(92)90448-K",

language = "English (US)",

volume = "373",

pages = "35--54",

journal = "Nuclear Physics, Section B",

issn = "0550-3213",

publisher = "Elsevier B.V.",

number = "1",

}

Armstrong, TA, Bettoni, D, Bharadwaj, V, Biino, C, Borreani, G, Broemmelsiek, DR, Buzzo, A, Calabrese, R, Ceccucci, A, Cester, R, Church, MD, Dalpiaz, P, Dameri, M, Dimitroyannis, D, Fabbri, M, Fast, JE, Ferroni, S, Gee, M, Ginsburg, CM, Gollwitzer, KE, Hahn, AA, Hasan, MA, Hsueh, SY, Lewis, RA, Luppi, E, Macrí, M, Majewska, AM, Mandelkern, MA, Marchetto, F, Marinelli, M, Marques, JL, Marsh, W, Martini, M, Masuzawa, M, Menichetti, E, Migliori, A, Mussa, R, Palestini, S, Pastrone, N, Patrignani, C, Peoples, J, Pesando, L, Petrucci, F, Pia, MG, Pordes, S, Rapidis, PA, Ray, RE, Reid, JD, Rinaudo, G, Rosen, JL, Santroni, A, Sarmiento, M, Savrié, M, Schultz, J, Seth, KK, Smith, GA, Tecchio, L, Tommasini, S, Trokenheim, S, Weber, MF, Werkema, SJ, Zhang, Y, Zhao, JL, Zioulas, G & Zito, M 1992, 'Study of the χ₁ and χ₂ charmonium states formed in pp annihilations', Nuclear Physics, Section B, vol. 373, no. 1, pp. 35-54. https://doi.org/10.1016/0550-3213(92)90448-K

TY - JOUR

T1 - Study of the χ1 and χ2 charmonium states formed in pp annihilations

AU - Armstrong, T. A.

AU - Bettoni, D.

AU - Bharadwaj, V.

AU - Biino, C.

AU - Borreani, G.

AU - Broemmelsiek, D. R.

AU - Buzzo, A.

AU - Calabrese, R.

AU - Ceccucci, A.

AU - Cester, R.

AU - Church, M. D.

AU - Dalpiaz, P.

AU - Dameri, M.

AU - Dimitroyannis, D.

AU - Fabbri, M.

AU - Fast, J. E.

AU - Ferroni, S.

AU - Gee, M.

AU - Ginsburg, C. M.

AU - Gollwitzer, K. E.

AU - Hahn, A. A.

AU - Hasan, M. A.

AU - Hsueh, S. Y.

AU - Lewis, R. A.

AU - Luppi, E.

AU - Macrí, M.

AU - Majewska, A. M.

AU - Mandelkern, M. A.

AU - Marchetto, F.

AU - Marinelli, M.

AU - Marques, J. L.

AU - Marsh, W.

AU - Martini, M.

AU - Masuzawa, M.

AU - Menichetti, E.

AU - Migliori, A.

AU - Mussa, R.

AU - Palestini, S.

AU - Pastrone, N.

AU - Patrignani, C.

AU - Peoples, J.

AU - Pesando, L.

AU - Petrucci, F.

AU - Pia, M. G.

AU - Pordes, S.

AU - Rapidis, P. A.

AU - Ray, R. E.

AU - Reid, J. D.

AU - Rinaudo, G.

AU - Rosen, J. L.

AU - Santroni, A.

AU - Sarmiento, M.

AU - Savrié, M.

AU - Schultz, J.

AU - Seth, K. K.

AU - Smith, G. A.

AU - Tecchio, L.

AU - Tommasini, S.

AU - Trokenheim, S.

AU - Weber, M. F.

AU - Werkema, S. J.

AU - Zhang, Y.

AU - Zhao, J. L.

AU - Zioulas, G.

AU - Zito, M.

N1 - Funding Information: The successful construction, integration and operation of the E760 detector was made possible by the dedicated technical support staffs from the collaborating institutions, whose superb effort we gratefully acknowledge. The crucial contribution of the Fermilab Accelerator Division Antiproton department is also gratefully acknowledged. This work was funded by the US Department of Energy and the National Science Foundation and by the Italian Istituto Nazionale di Fisica Nucleare.

PY - 1992/3/30

Y1 - 1992/3/30

N2 - We report on a study of the χ1(3P1) and χ2(3P2) states of charmonium formed in antiproton-proton annihilations. An energy scan through the resonances, performed with a very narrow momentum-band beam of antiprotons intersecting a hydrogen jet target, enables us to perform very precise measurements of the mass and the total width of the two resonances. From a sample of 513 χ1 and 585 χ2 events we find Mχ1 = (3510.53±0.13) MeV/c2, Mχ2 = (3556.15±0.14) MeV/c2, Γχ1 = (0.88±0.14) MeV and Γχ2 = (1.98±0.18) MeV. From our measurement of the quantity Γ(R → pp) × BR(R → J ψ → e+ e-), using known branching ratios, we obtain Λ(χ1 → pp) = (69±13) eV and Λ(χ2 → pp) = (180±31) eV.

AB - We report on a study of the χ1(3P1) and χ2(3P2) states of charmonium formed in antiproton-proton annihilations. An energy scan through the resonances, performed with a very narrow momentum-band beam of antiprotons intersecting a hydrogen jet target, enables us to perform very precise measurements of the mass and the total width of the two resonances. From a sample of 513 χ1 and 585 χ2 events we find Mχ1 = (3510.53±0.13) MeV/c2, Mχ2 = (3556.15±0.14) MeV/c2, Γχ1 = (0.88±0.14) MeV and Γχ2 = (1.98±0.18) MeV. From our measurement of the quantity Γ(R → pp) × BR(R → J ψ → e+ e-), using known branching ratios, we obtain Λ(χ1 → pp) = (69±13) eV and Λ(χ2 → pp) = (180±31) eV.

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UR - http://www.scopus.com/inward/citedby.url?scp=0002773428&partnerID=8YFLogxK

U2 - 10.1016/0550-3213(92)90448-K

DO - 10.1016/0550-3213(92)90448-K

M3 - Article

AN - SCOPUS:0002773428

SN - 0550-3213

VL - 373

SP - 35

EP - 54

JO - Nuclear Physics, Section B

JF - Nuclear Physics, Section B

IS - 1

ER -