Measurement of the radiative width of the η′(958) in two-photon interactions

M. Althoff; W. Braunschweig; F. J. Kirschfink; K. Lübelsmeyer; H. U. Martyn; P. Rosskamp; H. G. Sander; D. Schmitz; H. Siebke; W. Wallraff; J. Eisenmann; H. M. Fischer; H. Hartmann; A. Jocksch; G. Knop; L. Köpke; H. Kolanoski; H. Kück; V. Mertens; R. Wedemeyer; A. Eskreys; K. Gather; H. Hultschig; P. Joos; U. Kötz; H. Kowalski; A. Ladage; B. Löhr; D. Lüke; P. Mättig; D. Notz; R. J. Nowak; J. Pyrlik; E. Ronat; M. Rushton; W. Schütte; D. Trines; T. Tymieniecka; G. Wolf; G. Yekutieli; Ch Xiao; R. Fohrmann; E. Hilger; T. Kracht; H. L. Krasemann; P. Leu; E. Lohrmann; D. Pandoulas; G. Poelz; K. U. Pösnecker; B. H. Wiik; R. Beuselinck; D. M. Binnie; P. Dornan; B. Foster; D. A. Garbutt; C. Jenkins; T. D. Jones; W. G. Jones; J. McCardle; K. J. Sedgbeer; J. Thomas; W. A.T. Wan Abdullah; K. W. Bell; M. G. Bowler; P. Bull; R. J. Cashmore; P. E.L. Clarke; R. Devenish; P. Grossmann; C. M. Hawkes; S. L. Lloyd; C. Youngman; G. E. Forden; J. C. Hart; J. Harvey; D. K. Hasell; D. H. Saxon; F. Barreiro; S. Brandt; M. Dittmar; M. Holder; G. Kreutz; B. Neumann; E. Duchovni; Y. Eisenberg; U. Karshon; G. Mikenberg; R. Mir; D. Revel; A. Shapira; M. Winik; G. Baranko; A. Caldwell; M. Cherney; J. M. Izen; M. Mermikides; S. Ritz; G. Rudolph; D. Strom; M. Takashima; H. Venkataramania; E. Wicklund; Sau Lan Wu; G. Zobernig

doi:10.1016/0370-2693(84)91409-6

Measurement of the radiative width of the η′(958) in two-photon interactions

M. Althoff, W. Braunschweig, F. J. Kirschfink, K. Lübelsmeyer, H. U. Martyn, P. Rosskamp, H. G. Sander, D. Schmitz, H. Siebke, W. Wallraff, J. Eisenmann, H. M. Fischer, H. Hartmann, A. Jocksch, G. Knop, L. Köpke, H. Kolanoski, H. Kück, V. Mertens, R. WedemeyerA. Eskreys, K. Gather, H. Hultschig, P. Joos, U. Kötz, H. Kowalski, A. Ladage, B. Löhr, D. Lüke, P. Mättig, D. Notz, R. J. Nowak, J. Pyrlik, E. Ronat, M. Rushton, W. Schütte, D. Trines, T. Tymieniecka, G. Wolf, G. Yekutieli, Ch Xiao, R. Fohrmann, E. Hilger, T. Kracht, H. L. Krasemann, P. Leu, E. Lohrmann, D. Pandoulas, G. Poelz, K. U. Pösnecker, B. H. Wiik, R. Beuselinck, D. M. Binnie, P. Dornan, B. Foster, D. A. Garbutt, C. Jenkins, T. D. Jones, W. G. Jones, J. McCardle, K. J. Sedgbeer, J. Thomas, W. A.T. Wan Abdullah, K. W. Bell, M. G. Bowler, P. Bull, R. J. Cashmore, P. E.L. Clarke, R. Devenish, P. Grossmann, C. M. Hawkes, S. L. Lloyd, C. Youngman, G. E. Forden, J. C. Hart, J. Harvey, D. K. Hasell, D. H. Saxon, F. Barreiro, S. Brandt, M. Dittmar, M. Holder, G. Kreutz, B. Neumann, E. Duchovni, Y. Eisenberg, U. Karshon, G. Mikenberg, R. Mir, D. Revel, A. Shapira, M. Winik, G. Baranko, A. Caldwell, M. Cherney, J. M. Izen, M. Mermikides, S. Ritz, G. Rudolph, D. Strom, M. Takashima, H. Venkataramania, E. Wicklund, Sau Lan Wu, G. Zobernig

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Abstract

The reaction e⁺e^-→e⁺e^-η′(9 58) has been observed by detecting the final state π⁺π^-γ. The two-photon width of the η′ has been measured to be Γ(η′→γγ) = 5.1±0.4±0.7 keV. A search for the ι(1440) has been made in the ρ{variant}⁰γ final state. An upper limit has been obtained for the product Γ(ι(1440) → γ)gg), B (ι→ρ{variant}⁰γ) <1.5 keV (95%CL).

Original language	English (US)
Pages (from-to)	487-492
Number of pages	6
Journal	Physics Letters B
Volume	147
Issue number	6
DOIs	https://doi.org/10.1016/0370-2693(84)91409-6
State	Published - Nov 15 1984
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/0370-2693(84)91409-6

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Althoff, M., Braunschweig, W., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. U., Rosskamp, P., Sander, H. G., Schmitz, D., Siebke, H., Wallraff, W., Eisenmann, J., Fischer, H. M., Hartmann, H., Jocksch, A., Knop, G., Köpke, L., Kolanoski, H., Kück, H., Mertens, V., ... Zobernig, G. (1984). Measurement of the radiative width of the η′(958) in two-photon interactions. Physics Letters B, 147(6), 487-492. https://doi.org/10.1016/0370-2693(84)91409-6

Althoff, M, Braunschweig, W, Kirschfink, FJ, Lübelsmeyer, K, Martyn, HU, Rosskamp, P, Sander, HG, Schmitz, D, Siebke, H, Wallraff, W, Eisenmann, J, Fischer, HM, Hartmann, H, Jocksch, A, Knop, G, Köpke, L, Kolanoski, H, Kück, H, Mertens, V, Wedemeyer, R, Eskreys, A, Gather, K, Hultschig, H, Joos, P, Kötz, U, Kowalski, H, Ladage, A, Löhr, B, Lüke, D, Mättig, P, Notz, D, Nowak, RJ, Pyrlik, J, Ronat, E, Rushton, M, Schütte, W, Trines, D, Tymieniecka, T, Wolf, G, Yekutieli, G, Xiao, C, Fohrmann, R, Hilger, E, Kracht, T, Krasemann, HL, Leu, P, Lohrmann, E, Pandoulas, D, Poelz, G, Pösnecker, KU, Wiik, BH, Beuselinck, R, Binnie, DM, Dornan, P, Foster, B, Garbutt, DA, Jenkins, C, Jones, TD, Jones, WG, McCardle, J, Sedgbeer, KJ, Thomas, J, Wan Abdullah, WAT, Bell, KW, Bowler, MG, Bull, P, Cashmore, RJ, Clarke, PEL, Devenish, R, Grossmann, P, Hawkes, CM, Lloyd, SL, Youngman, C, Forden, GE, Hart, JC, Harvey, J, Hasell, DK, Saxon, DH, Barreiro, F, Brandt, S, Dittmar, M, Holder, M, Kreutz, G, Neumann, B, Duchovni, E, Eisenberg, Y, Karshon, U, Mikenberg, G, Mir, R, Revel, D, Shapira, A, Winik, M, Baranko, G, Caldwell, A, Cherney, M, Izen, JM, Mermikides, M, Ritz, S, Rudolph, G, Strom, D, Takashima, M, Venkataramania, H, Wicklund, E, Wu, SL & Zobernig, G 1984, 'Measurement of the radiative width of the η′(958) in two-photon interactions', Physics Letters B, vol. 147, no. 6, pp. 487-492. https://doi.org/10.1016/0370-2693(84)91409-6

@article{7fac752e50174828ad1c86c3944c5395,

title = "Measurement of the radiative width of the η′(958) in two-photon interactions",

abstract = "The reaction e+e-→e+e-η′(9 58) has been observed by detecting the final state π+π-γ. The two-photon width of the η′ has been measured to be Γ(η′→γγ) = 5.1±0.4±0.7 keV. A search for the ι(1440) has been made in the ρ{variant}0γ final state. An upper limit has been obtained for the product Γ(ι(1440) → γ)gg), B (ι→ρ{variant}0γ) <1.5 keV (95%CL).",

author = "M. Althoff and W. Braunschweig and Kirschfink, {F. J.} and K. L{\"u}belsmeyer and Martyn, {H. U.} and P. Rosskamp and Sander, {H. G.} and D. Schmitz and H. Siebke and W. Wallraff and J. Eisenmann and Fischer, {H. M.} and H. Hartmann and A. Jocksch and G. Knop and L. K{\"o}pke and H. Kolanoski and H. K{\"u}ck and V. Mertens and R. Wedemeyer and A. Eskreys and K. Gather and H. Hultschig and P. Joos and U. K{\"o}tz and H. Kowalski and A. Ladage and B. L{\"o}hr and D. L{\"u}ke and P. M{\"a}ttig and D. Notz and Nowak, {R. J.} and J. Pyrlik and E. Ronat and M. Rushton and W. Sch{\"u}tte and D. Trines and T. Tymieniecka and G. Wolf and G. Yekutieli and Ch Xiao and R. Fohrmann and E. Hilger and T. Kracht and Krasemann, {H. L.} and P. Leu and E. Lohrmann and D. Pandoulas and G. Poelz and P{\"o}snecker, {K. U.} and Wiik, {B. H.} and R. Beuselinck and Binnie, {D. M.} and P. Dornan and B. Foster and Garbutt, {D. A.} and C. Jenkins and Jones, {T. D.} and Jones, {W. G.} and J. McCardle and Sedgbeer, {K. J.} and J. Thomas and {Wan Abdullah}, {W. A.T.} and Bell, {K. W.} and Bowler, {M. G.} and P. Bull and Cashmore, {R. J.} and Clarke, {P. E.L.} and R. Devenish and P. Grossmann and Hawkes, {C. M.} and Lloyd, {S. L.} and C. Youngman and Forden, {G. E.} and Hart, {J. C.} and J. Harvey and Hasell, {D. K.} and Saxon, {D. H.} and F. Barreiro and S. Brandt and M. Dittmar and M. Holder and G. Kreutz and B. Neumann and E. Duchovni and Y. Eisenberg and U. Karshon and G. Mikenberg and R. Mir and D. Revel and A. Shapira and M. Winik and G. Baranko and A. Caldwell and M. Cherney and Izen, {J. M.} and M. Mermikides and S. Ritz and G. Rudolph and D. Strom and M. Takashima and H. Venkataramania and E. Wicklund and Wu, {Sau Lan} and G. Zobernig",

note = "Funding Information: In this reaction we have measured the two photon partial width of the r/' and searched for other resonances in this final state, in particular for the t(1440) which possibly \[6\]h as been observed in the/903 ' final state. The measurement was performed using the TASSO detector at PETRA, at beam energies of 7-18 GeV. The scattered electron and positron in the final state were not detected since they are predominantly emitted at very small angles. The main difficulty in the measurement of this decay mode lies in the detection of a low energy photon ((E. r) ~ 0.2 GeV). Consequently, a careful evaluation of the response of the electromagnetic detector for low energy 1 Present address: CERN, Geneva, Switzerland. 2 Present address: University of California, Santa Cruz, CA, USA. 3 On leave from Institute of Nuclear Physics, Cracow, Poland. 4 On leave from Warsaw University, Poland. s On leave from Weizmann Institute, Rehovot, Israel. 6 Present address: University of Science and Technology of China, Hefei, The People's Republic of China. 7 On leave from Universiti Malaya, Kuala Lumpur, Malaysia. 8 Supported by the Deutsches Bundesministerium for For-schung und Technologie. 9 Supported by the UK Science and Engineering Research Council. l0 Supported by the Minerva Gesellschaft t'fir Forschung mbH. 11 Supported by the US Department of Energy contract DE-AC02-76ER00881. Funding Information: We gratefully acknowledge the support by the DESY directorate and the PETRA machine group. We wish to thank the technical service groups at DESY and all the engineers and technicians at the collaborating institutions for their invaluable help. Those of us from outside DESY wish to thank the DESY directorate for the hospitality extended to us while working at DESY.",

year = "1984",

month = nov,

day = "15",

doi = "10.1016/0370-2693(84)91409-6",

language = "English (US)",

volume = "147",

pages = "487--492",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "6",

}

TY - JOUR

T1 - Measurement of the radiative width of the η′(958) in two-photon interactions

AU - Althoff, M.

AU - Braunschweig, W.

AU - Kirschfink, F. J.

AU - Lübelsmeyer, K.

AU - Martyn, H. U.

AU - Rosskamp, P.

AU - Sander, H. G.

AU - Schmitz, D.

AU - Siebke, H.

AU - Wallraff, W.

AU - Eisenmann, J.

AU - Fischer, H. M.

AU - Hartmann, H.

AU - Jocksch, A.

AU - Knop, G.

AU - Köpke, L.

AU - Kolanoski, H.

AU - Kück, H.

AU - Mertens, V.

AU - Wedemeyer, R.

AU - Eskreys, A.

AU - Gather, K.

AU - Hultschig, H.

AU - Joos, P.

AU - Kötz, U.

AU - Kowalski, H.

AU - Ladage, A.

AU - Löhr, B.

AU - Lüke, D.

AU - Mättig, P.

AU - Notz, D.

AU - Nowak, R. J.

AU - Pyrlik, J.

AU - Ronat, E.

AU - Rushton, M.

AU - Schütte, W.

AU - Trines, D.

AU - Tymieniecka, T.

AU - Wolf, G.

AU - Yekutieli, G.

AU - Xiao, Ch

AU - Fohrmann, R.

AU - Hilger, E.

AU - Kracht, T.

AU - Krasemann, H. L.

AU - Leu, P.

AU - Lohrmann, E.

AU - Pandoulas, D.

AU - Poelz, G.

AU - Pösnecker, K. U.

AU - Wiik, B. H.

AU - Beuselinck, R.

AU - Binnie, D. M.

AU - Dornan, P.

AU - Foster, B.

AU - Garbutt, D. A.

AU - Jenkins, C.

AU - Jones, T. D.

AU - Jones, W. G.

AU - McCardle, J.

AU - Sedgbeer, K. J.

AU - Thomas, J.

AU - Wan Abdullah, W. A.T.

AU - Bell, K. W.

AU - Bowler, M. G.

AU - Bull, P.

AU - Cashmore, R. J.

AU - Clarke, P. E.L.

AU - Devenish, R.

AU - Grossmann, P.

AU - Hawkes, C. M.

AU - Lloyd, S. L.

AU - Youngman, C.

AU - Forden, G. E.

AU - Hart, J. C.

AU - Harvey, J.

AU - Hasell, D. K.

AU - Saxon, D. H.

AU - Barreiro, F.

AU - Brandt, S.

AU - Dittmar, M.

AU - Holder, M.

AU - Kreutz, G.

AU - Neumann, B.

AU - Duchovni, E.

AU - Eisenberg, Y.

AU - Karshon, U.

AU - Mikenberg, G.

AU - Mir, R.

AU - Revel, D.

AU - Shapira, A.

AU - Winik, M.

AU - Baranko, G.

AU - Caldwell, A.

AU - Cherney, M.

AU - Izen, J. M.

AU - Mermikides, M.

AU - Ritz, S.

AU - Rudolph, G.

AU - Strom, D.

AU - Takashima, M.

AU - Venkataramania, H.

AU - Wicklund, E.

AU - Wu, Sau Lan

AU - Zobernig, G.

N1 - Funding Information: In this reaction we have measured the two photon partial width of the r/' and searched for other resonances in this final state, in particular for the t(1440) which possibly \[6\]h as been observed in the/903 ' final state. The measurement was performed using the TASSO detector at PETRA, at beam energies of 7-18 GeV. The scattered electron and positron in the final state were not detected since they are predominantly emitted at very small angles. The main difficulty in the measurement of this decay mode lies in the detection of a low energy photon ((E. r) ~ 0.2 GeV). Consequently, a careful evaluation of the response of the electromagnetic detector for low energy 1 Present address: CERN, Geneva, Switzerland. 2 Present address: University of California, Santa Cruz, CA, USA. 3 On leave from Institute of Nuclear Physics, Cracow, Poland. 4 On leave from Warsaw University, Poland. s On leave from Weizmann Institute, Rehovot, Israel. 6 Present address: University of Science and Technology of China, Hefei, The People's Republic of China. 7 On leave from Universiti Malaya, Kuala Lumpur, Malaysia. 8 Supported by the Deutsches Bundesministerium for For-schung und Technologie. 9 Supported by the UK Science and Engineering Research Council. l0 Supported by the Minerva Gesellschaft t'fir Forschung mbH. 11 Supported by the US Department of Energy contract DE-AC02-76ER00881. Funding Information: We gratefully acknowledge the support by the DESY directorate and the PETRA machine group. We wish to thank the technical service groups at DESY and all the engineers and technicians at the collaborating institutions for their invaluable help. Those of us from outside DESY wish to thank the DESY directorate for the hospitality extended to us while working at DESY.

PY - 1984/11/15

Y1 - 1984/11/15

N2 - The reaction e+e-→e+e-η′(9 58) has been observed by detecting the final state π+π-γ. The two-photon width of the η′ has been measured to be Γ(η′→γγ) = 5.1±0.4±0.7 keV. A search for the ι(1440) has been made in the ρ{variant}0γ final state. An upper limit has been obtained for the product Γ(ι(1440) → γ)gg), B (ι→ρ{variant}0γ) <1.5 keV (95%CL).

AB - The reaction e+e-→e+e-η′(9 58) has been observed by detecting the final state π+π-γ. The two-photon width of the η′ has been measured to be Γ(η′→γγ) = 5.1±0.4±0.7 keV. A search for the ι(1440) has been made in the ρ{variant}0γ final state. An upper limit has been obtained for the product Γ(ι(1440) → γ)gg), B (ι→ρ{variant}0γ) <1.5 keV (95%CL).

UR - http://www.scopus.com/inward/record.url?scp=0042219918&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042219918&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(84)91409-6

DO - 10.1016/0370-2693(84)91409-6

M3 - Article

AN - SCOPUS:0042219918

VL - 147

SP - 487

EP - 492

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 6

ER -

Measurement of the radiative width of the η′(958) in two-photon interactions

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