抜粋
A search for events with photon pairs of large invariant mass is described based on a data sample of 43 pb-1 collected with the OPAL detector. This search is motivated by the L3 observation of four events of the type e+e- → l+l-γγ with an invariant mass of the two photons, mγγ, clustering around 60 GeV. In the OPAL data, four ℓ+ℓ-γγ events are found with mγγ above 40 GeV. The number of observed events is consistent with the QED expectation and no obvious resonance structure is seen. Three candidate qq̄γγ events with mγγ above 40 GeV are found and no νν̄nγγ candidate with mγγ > 5 GeV is found. From these searches an upper limit is set on any anomalous production of ℓ+ℓ-γγ (ℓ = e, μ, τ) events, where the ℓ+ℓ- pair comes from a virtual Z0 and mγγ is near 60 GeV, of B(Z0 → Z*0γγ → ℓ+ℓ-γγ) < 6.0 × 10-7 at the 95% CL. In a similar search in the reaction e+e- → γγγ, seven events are observed with a photon pairing of mass near 60 GeV compared to an expected background of 2.7 ± 0.4 from QED. In a search for the production of a 60 GeV resonance X in two-photon collisions, an upper limit is set on ΓXB2(X → γγ) of 2.6 MeV at the 95% CL. A search is also performed for ℓ+ℓ-X (ℓ = e, μ) events in non-γγ decay modes of X. No indication of a 60 GeV resonance is seen. Combining these two searches, ΓX values greater than 110 MeV are excluded at the 95% CL for ℓ+ℓ-γγ (ℓ = e, μ) cross-sections greater than 0.05 pb.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 391-407 |
| ページ数 | 17 |
| ジャーナル | Physics Letters B |
| 巻 | 311 |
| 発行部数 | 1-4 |
| DOI | |
| 出版物ステータス | Published - 1993 7 29 |
| 外部発表 | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
フィンガープリント Search for anomalous production of high mass photon pairs in e<sup>+</sup>e<sup>-</sup> collisions at LEP' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。
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Search for anomalous production of high mass photon pairs in e+e- collisions at LEP. / Acton, P. D.; Akers, R.; Alexander, G.; Allison, J.; Anderson, K. J.; Arcelli, S.; Astbury, A.; Axen, D.; Azuelos, G.; Baines, J. T.M.; Ball, A. H.; Banks, J.; Barlow, R. J.; Barnett, S.; Bartoldus, R.; Batley, J. R.; Beaudoin, G.; Beck, A.; Beck, G. A.; Becker, J.; Beeston, C.; Behnke, T.; Bell, K. W.; Bella, G.; Bentkowski, P.; Berlich, P.; Bethke, S.; Biebel, O.; Bloodworth, I. J.; Bock, P.; Boden, B.; Bosch, H. M.; Boutemeur, M.; Breuker, H.; Bright-Thomas, P.; Brown, R. M.; Buijs, A.; Burckhart, H. J.; Burgard, C.; Capiluppi, P.; Carnegie, R. K.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlton, D. G.; Chu, S. L.; Clarke, P. E.L.; Clayton, J. C.; Cohen, I.; Conboy, J. E.; Cooper, M.; Coupland, M.; Cuffiani, M.; Dado, S.; Dallavalle, G. M.; De Jong, S.; del Pozo, L. A.; Deng, H.; Dieckmann, A.; Dittmar, M.; Dixit, M. S.; do Couto e Silva, E.; Duboscq, J. E.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Dumas, D. J.P.; Elcombe, P. A.; Estabrooks, P. G.; Etzion, E.; Evans, H. G.; Fabbri, F.; Fabbro, B.; Fierro, M.; Fincke-Keeler, M.; Fischer, H. M.; Fong, D. G.; Foucher, M.; Gaidot, A.; Gary, J. W.; Gascon, J.; Geddes, N. I.; Geich-Gimbel, C.; Gensler, S. W.; Gentit, F. X.; Giacomelli, G.; Giacomelli, R.; Gibson, V.; Gibson, W. R.; Gillies, J. D.; Gingrich, D. M.; Goldberg, J.; Goodrick, M. J.; Gorn, W.; Grandi, C.; Grant, F. C.; Hagemann, J.; Hanson, G. G.; Hansroul, M.; Hargrove, C. K.; Harrison, P. F.; Hart, J.; Hattersley, P. M.; Hauschild, M.; Hawkes, C. M.; Heflin, E.; Hemingway, R. J.; Herten, G.; Heuer, R. D.; Hill, J. C.; Hillier, S. J.; Hilse, T.; Hinshaw, D. A.; Hobbs, J. D.; Hobson, P. R.; Hochman, D.; Homer, R. J.; Honma, A. K.; Hughes-Jones, R. E.; Humbert, R.; Igo-Kemenes, P.; Ihssen, H.; Imrie, D. C.; Janissen, A. C.; Jawahery, A.; Jeffreys, P. W.; Jeremie, H.; Jimack, M.; Jones, M.; Jones, R. W.L.; Jovanovic, P.; Jui, C.; Karlen, D.; Kawagoe, K.; Kawamoto, T.; Keeler, R. K.; Kellogg, R. G.; Kennedy, B. W.; Kluth, S.; Kobayashi, T.; Koetke, D. S.; Kokott, T. P.; Komamiya, Sachio; Köpke, L.; Kral, J. F.; Kowalewski, R.; von Krogh, J.; Kroll, J.; Kuwano, M.; Kyberd, P.; Lafferty, G. D.; Lafoux, H.; Lahmann, R.; Lamarche, F.; Layter, J. G.; Leblanc, P.; Lee, A. M.; Lehto, M. H.; Lellouch, D.; Leroy, C.; Letts, J.; Levegrün, S.; Levinson, L.; Lloyd, S. L.; Loebinger, F. K.; Lorah, J. M.; Lorazo, B.; Losty, M. J.; Lou, X. C.; Ludwig, J.; Luig, A.; Mannelli, M.; Marcellini, S.; Markus, C.; Martin, A. J.; Martin, J. P.; Mashimo, T.; Mättig, P.; Maur, U.; McKenna, J.; McMahon, T. J.; McNutt, J. R.; Meijers, F.; Menszner, D.; Merritt, F. S.; Mes, H.; Michelini, A.; Middleton, R. P.; Mikenberg, G.; Mildenberger, J.; Miller, D. J.; Mir, R.; Mohr, W.; Moisan, C.; Montanari, A.; Mori, T.; Morii, M.; Müller, U.; Nellen, B.; Nguyen, H. H.; O'Neale, S. W.; Oakham, F. G.; Odorici, F.; Orgen, H. O.; Oram, C. J.; Oreglia, M. J.; Orito, S.; Pansart, J. P.; Panzer-Steindel, B.; Paschievici, P.; Patrick, G. N.; Paz-Jaoshvili, N.; Pearce, M. J.; Pfister, P.; Pilcher, J. E.; Pinfold, J.; Pitman, D.; Plane, D. E.; Poffenberger, P.; Poli, B.; Pouladdej, A.; Pritchard, T. W.; Przysiezniak, H.; Quast, G.; Redmond, M. W.; Rees, D. L.; Richards, G. E.; Robins, S. A.; Robinson, D.; Rollnik, A.; Roney, J. M.; Ros, E.; Rossberg, S.; Rossi, A. M.; Rosvick, M.; Routenburg, P.; Runge, K.; Runolfsson, O.; Rust, D. R.; Sasaki, M.; Sbarra, C.; Schaile, A. D.; Schaile, O.; Schappert, W.; Scharff-Hansen, P.; Schenk, P.; Schmitt, B.; von der Schmitt, H.; Schröder, M.; Schwick, C.; Schwiening, J.; Scott, W. G.; Settles, M.; Shears, T. G.; Shen, B. C.; Shepherd-Themistocleous, C. H.; Sherwood, P.; Siroli, G. P.; Skillman, A.; Skuja, A.; Smith, A. M.; Smith, T. J.; Snow, G. A.; Sobie, R.; Springer, R. W.; Sproston, M.; Stahl, A.; Stegmann, C.; Stephens, K.; Steuerer, J.; Ströhmer, R.; Strom, D.; Takeda, H.; Takeshita, T.; Tarem, S.; Tecchio, M.; Teixeira-Dias, P.; Tesch, N.; Thomson, M. A.; Torrente-Lujan, E.; Towers, S.; Transtromer, G.; Tresilian, N. J.; Tsukamoto, T.; Turner, M. F.; Van den plas, D.; Van Kooten, R.; VanDalen, G. J.; Vasseur, G.; Virtue, C. J.; Wagner, A.; Wagner, D. L.; Wahl, C.; Ward, C. P.; Ward, D. R.; Watkins, P. M.; Watson, A. T.; Watson, N. K.; Weber, M.; Weber, P.; Wells, P. S.; Wermes, N.; Whalley, M. A.; Wilkens, B.; Wilson, G. W.; Wilson, J. A.; Winterer, V. H.; Wlodek, T.; Wolf, G.; Wotton, S.; Wyatt, T. R.; Yaari, R.; Yeaman, A.; Yekutieli, G.; Yurko, M.; Zeuner, W.; Zorn, G. T.
：: Physics Letters B, 巻 311, 番号 1-4, 29.07.1993, p. 391-407.研究成果: Article
}
TY - JOUR
T1 - Search for anomalous production of high mass photon pairs in e+e- collisions at LEP
AU - Acton, P. D.
AU - Akers, R.
AU - Alexander, G.
AU - Allison, J.
AU - Anderson, K. J.
AU - Arcelli, S.
AU - Astbury, A.
AU - Axen, D.
AU - Azuelos, G.
AU - Baines, J. T.M.
AU - Ball, A. H.
AU - Banks, J.
AU - Barlow, R. J.
AU - Barnett, S.
AU - Bartoldus, R.
AU - Batley, J. R.
AU - Beaudoin, G.
AU - Beck, A.
AU - Beck, G. A.
AU - Becker, J.
AU - Beeston, C.
AU - Behnke, T.
AU - Bell, K. W.
AU - Bella, G.
AU - Bentkowski, P.
AU - Berlich, P.
AU - Bethke, S.
AU - Biebel, O.
AU - Bloodworth, I. J.
AU - Bock, P.
AU - Boden, B.
AU - Bosch, H. M.
AU - Boutemeur, M.
AU - Breuker, H.
AU - Bright-Thomas, P.
AU - Brown, R. M.
AU - Buijs, A.
AU - Burckhart, H. J.
AU - Burgard, C.
AU - Capiluppi, P.
AU - Carnegie, R. K.
AU - Carter, A. A.
AU - Carter, J. R.
AU - Chang, C. Y.
AU - Charlton, D. G.
AU - Chu, S. L.
AU - Clarke, P. E.L.
AU - Clayton, J. C.
AU - Cohen, I.
AU - Conboy, J. E.
AU - Cooper, M.
AU - Coupland, M.
AU - Cuffiani, M.
AU - Dado, S.
AU - Dallavalle, G. M.
AU - De Jong, S.
AU - del Pozo, L. A.
AU - Deng, H.
AU - Dieckmann, A.
AU - Dittmar, M.
AU - Dixit, M. S.
AU - do Couto e Silva, E.
AU - Duboscq, J. E.
AU - Duchovni, E.
AU - Duckeck, G.
AU - Duerdoth, I. P.
AU - Dumas, D. J.P.
AU - Elcombe, P. A.
AU - Estabrooks, P. G.
AU - Etzion, E.
AU - Evans, H. G.
AU - Fabbri, F.
AU - Fabbro, B.
AU - Fierro, M.
AU - Fincke-Keeler, M.
AU - Fischer, H. M.
AU - Fong, D. G.
AU - Foucher, M.
AU - Gaidot, A.
AU - Gary, J. W.
AU - Gascon, J.
AU - Geddes, N. I.
AU - Geich-Gimbel, C.
AU - Gensler, S. W.
AU - Gentit, F. X.
AU - Giacomelli, G.
AU - Giacomelli, R.
AU - Gibson, V.
AU - Gibson, W. R.
AU - Gillies, J. D.
AU - Gingrich, D. M.
AU - Goldberg, J.
AU - Goodrick, M. J.
AU - Gorn, W.
AU - Grandi, C.
AU - Grant, F. C.
AU - Hagemann, J.
AU - Hanson, G. G.
AU - Hansroul, M.
AU - Hargrove, C. K.
AU - Harrison, P. F.
AU - Hart, J.
AU - Hattersley, P. M.
AU - Hauschild, M.
AU - Hawkes, C. M.
AU - Heflin, E.
AU - Hemingway, R. J.
AU - Herten, G.
AU - Heuer, R. D.
AU - Hill, J. C.
AU - Hillier, S. J.
AU - Hilse, T.
AU - Hinshaw, D. A.
AU - Hobbs, J. D.
AU - Hobson, P. R.
AU - Hochman, D.
AU - Homer, R. J.
AU - Honma, A. K.
AU - Hughes-Jones, R. E.
AU - Humbert, R.
AU - Igo-Kemenes, P.
AU - Ihssen, H.
AU - Imrie, D. C.
AU - Janissen, A. C.
AU - Jawahery, A.
AU - Jeffreys, P. W.
AU - Jeremie, H.
AU - Jimack, M.
AU - Jones, M.
AU - Jones, R. W.L.
AU - Jovanovic, P.
AU - Jui, C.
AU - Karlen, D.
AU - Kawagoe, K.
AU - Kawamoto, T.
AU - Keeler, R. K.
AU - Kellogg, R. G.
AU - Kennedy, B. W.
AU - Kluth, S.
AU - Kobayashi, T.
AU - Koetke, D. S.
AU - Kokott, T. P.
AU - Komamiya, Sachio
AU - Köpke, L.
AU - Kral, J. F.
AU - Kowalewski, R.
AU - von Krogh, J.
AU - Kroll, J.
AU - Kuwano, M.
AU - Kyberd, P.
AU - Lafferty, G. D.
AU - Lafoux, H.
AU - Lahmann, R.
AU - Lamarche, F.
AU - Layter, J. G.
AU - Leblanc, P.
AU - Lee, A. M.
AU - Lehto, M. H.
AU - Lellouch, D.
AU - Leroy, C.
AU - Letts, J.
AU - Levegrün, S.
AU - Levinson, L.
AU - Lloyd, S. L.
AU - Loebinger, F. K.
AU - Lorah, J. M.
AU - Lorazo, B.
AU - Losty, M. J.
AU - Lou, X. C.
AU - Ludwig, J.
AU - Luig, A.
AU - Mannelli, M.
AU - Marcellini, S.
AU - Markus, C.
AU - Martin, A. J.
AU - Martin, J. P.
AU - Mashimo, T.
AU - Mättig, P.
AU - Maur, U.
AU - McKenna, J.
AU - McMahon, T. J.
AU - McNutt, J. R.
AU - Meijers, F.
AU - Menszner, D.
AU - Merritt, F. S.
AU - Mes, H.
AU - Michelini, A.
AU - Middleton, R. P.
AU - Mikenberg, G.
AU - Mildenberger, J.
AU - Miller, D. J.
AU - Mir, R.
AU - Mohr, W.
AU - Moisan, C.
AU - Montanari, A.
AU - Mori, T.
AU - Morii, M.
AU - Müller, U.
AU - Nellen, B.
AU - Nguyen, H. H.
AU - O'Neale, S. W.
AU - Oakham, F. G.
AU - Odorici, F.
AU - Orgen, H. O.
AU - Oram, C. J.
AU - Oreglia, M. J.
AU - Orito, S.
AU - Pansart, J. P.
AU - Panzer-Steindel, B.
AU - Paschievici, P.
AU - Patrick, G. N.
AU - Paz-Jaoshvili, N.
AU - Pearce, M. J.
AU - Pfister, P.
AU - Pilcher, J. E.
AU - Pinfold, J.
AU - Pitman, D.
AU - Plane, D. E.
AU - Poffenberger, P.
AU - Poli, B.
AU - Pouladdej, A.
AU - Pritchard, T. W.
AU - Przysiezniak, H.
AU - Quast, G.
AU - Redmond, M. W.
AU - Rees, D. L.
AU - Richards, G. E.
AU - Robins, S. A.
AU - Robinson, D.
AU - Rollnik, A.
AU - Roney, J. M.
AU - Ros, E.
AU - Rossberg, S.
AU - Rossi, A. M.
AU - Rosvick, M.
AU - Routenburg, P.
AU - Runge, K.
AU - Runolfsson, O.
AU - Rust, D. R.
AU - Sasaki, M.
AU - Sbarra, C.
AU - Schaile, A. D.
AU - Schaile, O.
AU - Schappert, W.
AU - Scharff-Hansen, P.
AU - Schenk, P.
AU - Schmitt, B.
AU - von der Schmitt, H.
AU - Schröder, M.
AU - Schwick, C.
AU - Schwiening, J.
AU - Scott, W. G.
AU - Settles, M.
AU - Shears, T. G.
AU - Shen, B. C.
AU - Shepherd-Themistocleous, C. H.
AU - Sherwood, P.
AU - Siroli, G. P.
AU - Skillman, A.
AU - Skuja, A.
AU - Smith, A. M.
AU - Smith, T. J.
AU - Snow, G. A.
AU - Sobie, R.
AU - Springer, R. W.
AU - Sproston, M.
AU - Stahl, A.
AU - Stegmann, C.
AU - Stephens, K.
AU - Steuerer, J.
AU - Ströhmer, R.
AU - Strom, D.
AU - Takeda, H.
AU - Takeshita, T.
AU - Tarem, S.
AU - Tecchio, M.
AU - Teixeira-Dias, P.
AU - Tesch, N.
AU - Thomson, M. A.
AU - Torrente-Lujan, E.
AU - Towers, S.
AU - Transtromer, G.
AU - Tresilian, N. J.
AU - Tsukamoto, T.
AU - Turner, M. F.
AU - Van den plas, D.
AU - Van Kooten, R.
AU - VanDalen, G. J.
AU - Vasseur, G.
AU - Virtue, C. J.
AU - Wagner, A.
AU - Wagner, D. L.
AU - Wahl, C.
AU - Ward, C. P.
AU - Ward, D. R.
AU - Watkins, P. M.
AU - Watson, A. T.
AU - Watson, N. K.
AU - Weber, M.
AU - Weber, P.
AU - Wells, P. S.
AU - Wermes, N.
AU - Whalley, M. A.
AU - Wilkens, B.
AU - Wilson, G. W.
AU - Wilson, J. A.
AU - Winterer, V. H.
AU - Wlodek, T.
AU - Wolf, G.
AU - Wotton, S.
AU - Wyatt, T. R.
AU - Yaari, R.
AU - Yeaman, A.
AU - Yekutieli, G.
AU - Yurko, M.
AU - Zeuner, W.
AU - Zorn, G. T.
PY - 1993/7/29
Y1 - 1993/7/29
N2 - A search for events with photon pairs of large invariant mass is described based on a data sample of 43 pb-1 collected with the OPAL detector. This search is motivated by the L3 observation of four events of the type e+e- → l+l-γγ with an invariant mass of the two photons, mγγ, clustering around 60 GeV. In the OPAL data, four ℓ+ℓ-γγ events are found with mγγ above 40 GeV. The number of observed events is consistent with the QED expectation and no obvious resonance structure is seen. Three candidate qq̄γγ events with mγγ above 40 GeV are found and no νν̄nγγ candidate with mγγ > 5 GeV is found. From these searches an upper limit is set on any anomalous production of ℓ+ℓ-γγ (ℓ = e, μ, τ) events, where the ℓ+ℓ- pair comes from a virtual Z0 and mγγ is near 60 GeV, of B(Z0 → Z*0γγ → ℓ+ℓ-γγ) < 6.0 × 10-7 at the 95% CL. In a similar search in the reaction e+e- → γγγ, seven events are observed with a photon pairing of mass near 60 GeV compared to an expected background of 2.7 ± 0.4 from QED. In a search for the production of a 60 GeV resonance X in two-photon collisions, an upper limit is set on ΓXB2(X → γγ) of 2.6 MeV at the 95% CL. A search is also performed for ℓ+ℓ-X (ℓ = e, μ) events in non-γγ decay modes of X. No indication of a 60 GeV resonance is seen. Combining these two searches, ΓX values greater than 110 MeV are excluded at the 95% CL for ℓ+ℓ-γγ (ℓ = e, μ) cross-sections greater than 0.05 pb.
AB - A search for events with photon pairs of large invariant mass is described based on a data sample of 43 pb-1 collected with the OPAL detector. This search is motivated by the L3 observation of four events of the type e+e- → l+l-γγ with an invariant mass of the two photons, mγγ, clustering around 60 GeV. In the OPAL data, four ℓ+ℓ-γγ events are found with mγγ above 40 GeV. The number of observed events is consistent with the QED expectation and no obvious resonance structure is seen. Three candidate qq̄γγ events with mγγ above 40 GeV are found and no νν̄nγγ candidate with mγγ > 5 GeV is found. From these searches an upper limit is set on any anomalous production of ℓ+ℓ-γγ (ℓ = e, μ, τ) events, where the ℓ+ℓ- pair comes from a virtual Z0 and mγγ is near 60 GeV, of B(Z0 → Z*0γγ → ℓ+ℓ-γγ) < 6.0 × 10-7 at the 95% CL. In a similar search in the reaction e+e- → γγγ, seven events are observed with a photon pairing of mass near 60 GeV compared to an expected background of 2.7 ± 0.4 from QED. In a search for the production of a 60 GeV resonance X in two-photon collisions, an upper limit is set on ΓXB2(X → γγ) of 2.6 MeV at the 95% CL. A search is also performed for ℓ+ℓ-X (ℓ = e, μ) events in non-γγ decay modes of X. No indication of a 60 GeV resonance is seen. Combining these two searches, ΓX values greater than 110 MeV are excluded at the 95% CL for ℓ+ℓ-γγ (ℓ = e, μ) cross-sections greater than 0.05 pb.
UR - http://www.scopus.com/inward/record.url?scp=0001478122&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001478122&partnerID=8YFLogxK
U2 - 10.1016/0370-2693(93)90586-7
DO - 10.1016/0370-2693(93)90586-7
M3 - Article
AN - SCOPUS:0001478122
VL - 311
SP - 391
EP - 407
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 - 1-4
ER -