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Multi-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$
Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e- collisions at centre-of-mass energies in the range 192 - 209 GeV using the OPAL detector at LEP. Cross-section measurements are performed within the kinematic acceptance of the...
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Lenguaje: | eng |
Publicado: |
2004
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2004.09.059 http://cds.cern.ch/record/786367 |
_version_ | 1780904418277851136 |
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author | Abbiendi, G. Ainsley, C. Akesson, P.F. Alexander, G. Allison, John Amaral, P. Anagnostou, G. Anderson, K.J. Asai, S. Axen, D. Azuelos, G. Bailey, I. Barberio, E. Barillari, T. Barlow, R.J. Batley, R.J. Bechtle, P. Behnke, T. Bell, Kenneth Watson Bell, P.J. Bella, G. Bellerive, A. Benelli, G. Bethke, S. Biebel, O. Boeriu, O. Bock, P. Boutemeur, M. Braibant, S. Brigliadori, L. Brown, Robert M. Buesser, K. Burckhart, H.J. Campana, S. Carnegie, R.K. Carter, A.A. Carter, J.R. Chang, C.Y. Charlton, D.G. Ciocca, C. Csilling, A. Cuffiani, M. Dado, S. De Roeck, A. De Wolf, E.A. Desch, K. Dienes, B. Donkers, M. Dubbert, J. Duchovni, E. Duckeck, G. Duerdoth, I.P. Etzion, E. Fabbri, F. Feld, L. Ferrari, P. Fiedler, F. Fleck, I. Ford, M. Frey, A. Gagnon, P. Gary, John William Gaycken, G. Geich-Gimbel, C. Giacomelli, G. Giacomelli, P. Giunta, Marina Goldberg, J. Gross, E. Grunhaus, J. Gruwe, M. Gunther, P.O. Gupta, A. Hajdu, C. Hamann, M. Hanson, G.G. Harel, A. Hauschild, M. Hawkes, C.M. Hawkings, R. Hemingway, R.J. Herten, G. Heuer, R.D. Hill, J.C. Hoffman, Kara Dion Horvath, D. Igo-Kemenes, P. Ishii, K. Jeremie, H. Jovanovic, P. Junk, T.R. Kanaya, N. Kanzaki, J. Karlen, D. Kawagoe, K. Kawamoto, T. Keeler, R.K. Kellogg, R.G. Kennedy, B.W. Kluth, S. Kobayashi, T. Kobel, M. Komamiya, S. Kramer, T. Krieger, P. von Krogh, J. Kruger, K. Kuhl, T. Kupper, M. Lafferty, G.D. Landsman, H. Lanske, D. Layter, J.G. Lellouch, D. Lettso, J. Levinson, L. Lillich, J. Lloyd, S.L. Loebinger, F.K. Lu, J. Ludwig, A. Ludwig, J. Mader, W. Marcellini, S. Martin, A.J. Masetti, G. Mashimo, T. Mattig, Peter McKenna, J. McPherson, R.A. Meijers, F. Menges, W. Merritt, F.S. Mes, H. Meyer, Niels T. Michelini, A. Mihara, S. Mikenberg, G. Miller, D.J. Moed, S. Mohr, W. Mori, T. Mutter, A. Nagai, K. Nakamura, I. Nanjo, H. Neal, H.A. Nisius, R. O'Neale, S.W. Oh, A. Oreglia, M.J. Orito, S. Pahl, C. Pasztor, G. Pater, J.R. Pilcher, J.E. Pinfold, J. Plane, David E. Poli, B. Pooth, O. Przybycien, M. Quadt, A. Rabbertz, K. Rembser, C. Renkel, P. Roney, J.M. Rozen, Y. Runge, K. Sachs, K. Saeki, T. Sarkisyan, E.K.G. Schaile, A.D. Schaile, O. Scharff-Hansen, P. Schieck, J. Schorner-Sadenius, T. Schroder, Matthias Schumacher, M. Scott, W.G. Seuster, R. Shears, T.G. Shen, B.C. Sherwood, P. Skuja, A. Smith, A.M. Sobie, R. Soldner-Rembold, S. Spano, F. Stahl, A. Strom, David M. Strohmer, R. Tarem, S. Tasevsky, M. Teuscher, R. Thomson, M.A. Torrence, E. Toya, D. Tran, P. Trigger, I. Trocsanyi, Z. Tsur, E. Turner-Watson, M.F. Ueda, I. Ujvari, B. Vollmer, C.F. Vannerem, P. Vertesi, R. Verzocchi, M. Voss, H. Vossebeld, J. Ward, C.P. Ward, D.R. Watkins, P.M. Watson, A.T. Watson, N.K. Wells, P.S. Wengler, T. Wermes, N. Wilson, G.W. Wilson, J.A. Wolf, G. Wyatt, T.R. Yamashita, S. Zer-Zion, D. Zivkovic, Lidija |
author_facet | Abbiendi, G. Ainsley, C. Akesson, P.F. Alexander, G. Allison, John Amaral, P. Anagnostou, G. Anderson, K.J. Asai, S. Axen, D. Azuelos, G. Bailey, I. Barberio, E. Barillari, T. Barlow, R.J. Batley, R.J. Bechtle, P. Behnke, T. Bell, Kenneth Watson Bell, P.J. Bella, G. Bellerive, A. Benelli, G. Bethke, S. Biebel, O. Boeriu, O. Bock, P. Boutemeur, M. Braibant, S. Brigliadori, L. Brown, Robert M. Buesser, K. Burckhart, H.J. Campana, S. Carnegie, R.K. Carter, A.A. Carter, J.R. Chang, C.Y. Charlton, D.G. Ciocca, C. Csilling, A. Cuffiani, M. Dado, S. De Roeck, A. De Wolf, E.A. Desch, K. Dienes, B. Donkers, M. Dubbert, J. Duchovni, E. Duckeck, G. Duerdoth, I.P. Etzion, E. Fabbri, F. Feld, L. Ferrari, P. Fiedler, F. Fleck, I. Ford, M. Frey, A. Gagnon, P. Gary, John William Gaycken, G. Geich-Gimbel, C. Giacomelli, G. Giacomelli, P. Giunta, Marina Goldberg, J. Gross, E. Grunhaus, J. Gruwe, M. Gunther, P.O. Gupta, A. Hajdu, C. Hamann, M. Hanson, G.G. Harel, A. Hauschild, M. Hawkes, C.M. Hawkings, R. Hemingway, R.J. Herten, G. Heuer, R.D. Hill, J.C. Hoffman, Kara Dion Horvath, D. Igo-Kemenes, P. Ishii, K. Jeremie, H. Jovanovic, P. Junk, T.R. Kanaya, N. Kanzaki, J. Karlen, D. Kawagoe, K. Kawamoto, T. Keeler, R.K. Kellogg, R.G. Kennedy, B.W. Kluth, S. Kobayashi, T. Kobel, M. Komamiya, S. Kramer, T. Krieger, P. von Krogh, J. Kruger, K. Kuhl, T. Kupper, M. Lafferty, G.D. Landsman, H. Lanske, D. Layter, J.G. Lellouch, D. Lettso, J. Levinson, L. Lillich, J. Lloyd, S.L. Loebinger, F.K. Lu, J. Ludwig, A. Ludwig, J. Mader, W. Marcellini, S. Martin, A.J. Masetti, G. Mashimo, T. Mattig, Peter McKenna, J. McPherson, R.A. Meijers, F. Menges, W. Merritt, F.S. Mes, H. Meyer, Niels T. Michelini, A. Mihara, S. Mikenberg, G. Miller, D.J. Moed, S. Mohr, W. Mori, T. Mutter, A. Nagai, K. Nakamura, I. Nanjo, H. Neal, H.A. Nisius, R. O'Neale, S.W. Oh, A. Oreglia, M.J. Orito, S. Pahl, C. Pasztor, G. Pater, J.R. Pilcher, J.E. Pinfold, J. Plane, David E. Poli, B. Pooth, O. Przybycien, M. Quadt, A. Rabbertz, K. Rembser, C. Renkel, P. Roney, J.M. Rozen, Y. Runge, K. Sachs, K. Saeki, T. Sarkisyan, E.K.G. Schaile, A.D. Schaile, O. Scharff-Hansen, P. Schieck, J. Schorner-Sadenius, T. Schroder, Matthias Schumacher, M. Scott, W.G. Seuster, R. Shears, T.G. Shen, B.C. Sherwood, P. Skuja, A. Smith, A.M. Sobie, R. Soldner-Rembold, S. Spano, F. Stahl, A. Strom, David M. Strohmer, R. Tarem, S. Tasevsky, M. Teuscher, R. Thomson, M.A. Torrence, E. Toya, D. Tran, P. Trigger, I. Trocsanyi, Z. Tsur, E. Turner-Watson, M.F. Ueda, I. Ujvari, B. Vollmer, C.F. Vannerem, P. Vertesi, R. Verzocchi, M. Voss, H. Vossebeld, J. Ward, C.P. Ward, D.R. Watkins, P.M. Watson, A.T. Watson, N.K. Wells, P.S. Wengler, T. Wermes, N. Wilson, G.W. Wilson, J.A. Wolf, G. Wyatt, T.R. Yamashita, S. Zer-Zion, D. Zivkovic, Lidija |
author_sort | Abbiendi, G. |
collection | CERN |
description | Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e- collisions at centre-of-mass energies in the range 192 - 209 GeV using the OPAL detector at LEP. Cross-section measurements are performed within the kinematic acceptance of the selection and compared with the expectation from the Standard Model process e+e- -> nu nu gamma gamma(gamma). No evidence for new physics contributions to this final state is observed. Upper limits on sigma (e+e- -> XX) BR^2(X -> Ygamma) are derived for the case of stable and invisible Y. In the case of massive Y the combined limits obtained from all the data range from 10 fb to 60 fb, while for the special case of massless Y the range is 20 fb to 40 fb. The limits apply to pair production of excited neutrions (X=nu^*,Y=nu), to neutralino production (X=~chi^0_2, Y=~chi^0_1) and to supersymmetric models in which X=~chi^0_1 and Y=~G is a light gravitino. |
id | cern-786367 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2004 |
record_format | invenio |
spelling | cern-7863672022-08-10T10:06:41Zdoi:10.1016/j.physletb.2004.09.059http://cds.cern.ch/record/786367engAbbiendi, G.Ainsley, C.Akesson, P.F.Alexander, G.Allison, JohnAmaral, P.Anagnostou, G.Anderson, K.J.Asai, S.Axen, D.Azuelos, G.Bailey, I.Barberio, E.Barillari, T.Barlow, R.J.Batley, R.J.Bechtle, P.Behnke, T.Bell, Kenneth WatsonBell, P.J.Bella, G.Bellerive, A.Benelli, G.Bethke, S.Biebel, O.Boeriu, O.Bock, P.Boutemeur, M.Braibant, S.Brigliadori, L.Brown, Robert M.Buesser, K.Burckhart, H.J.Campana, S.Carnegie, R.K.Carter, A.A.Carter, J.R.Chang, C.Y.Charlton, D.G.Ciocca, C.Csilling, A.Cuffiani, M.Dado, S.De Roeck, A.De Wolf, E.A.Desch, K.Dienes, B.Donkers, M.Dubbert, J.Duchovni, E.Duckeck, G.Duerdoth, I.P.Etzion, E.Fabbri, F.Feld, L.Ferrari, P.Fiedler, F.Fleck, I.Ford, M.Frey, A.Gagnon, P.Gary, John WilliamGaycken, G.Geich-Gimbel, C.Giacomelli, G.Giacomelli, P.Giunta, MarinaGoldberg, J.Gross, E.Grunhaus, J.Gruwe, M.Gunther, P.O.Gupta, A.Hajdu, C.Hamann, M.Hanson, G.G.Harel, A.Hauschild, M.Hawkes, C.M.Hawkings, R.Hemingway, R.J.Herten, G.Heuer, R.D.Hill, J.C.Hoffman, Kara DionHorvath, D.Igo-Kemenes, P.Ishii, K.Jeremie, H.Jovanovic, P.Junk, T.R.Kanaya, N.Kanzaki, J.Karlen, D.Kawagoe, K.Kawamoto, T.Keeler, R.K.Kellogg, R.G.Kennedy, B.W.Kluth, S.Kobayashi, T.Kobel, M.Komamiya, S.Kramer, T.Krieger, P.von Krogh, J.Kruger, K.Kuhl, T.Kupper, M.Lafferty, G.D.Landsman, H.Lanske, D.Layter, J.G.Lellouch, D.Lettso, J.Levinson, L.Lillich, J.Lloyd, S.L.Loebinger, F.K.Lu, J.Ludwig, A.Ludwig, J.Mader, W.Marcellini, S.Martin, A.J.Masetti, G.Mashimo, T.Mattig, PeterMcKenna, J.McPherson, R.A.Meijers, F.Menges, W.Merritt, F.S.Mes, H.Meyer, Niels T.Michelini, A.Mihara, S.Mikenberg, G.Miller, D.J.Moed, S.Mohr, W.Mori, T.Mutter, A.Nagai, K.Nakamura, I.Nanjo, H.Neal, H.A.Nisius, R.O'Neale, S.W.Oh, A.Oreglia, M.J.Orito, S.Pahl, C.Pasztor, G.Pater, J.R.Pilcher, J.E.Pinfold, J.Plane, David E.Poli, B.Pooth, O.Przybycien, M.Quadt, A.Rabbertz, K.Rembser, C.Renkel, P.Roney, J.M.Rozen, Y.Runge, K.Sachs, K.Saeki, T.Sarkisyan, E.K.G.Schaile, A.D.Schaile, O.Scharff-Hansen, P.Schieck, J.Schorner-Sadenius, T.Schroder, MatthiasSchumacher, M.Scott, W.G.Seuster, R.Shears, T.G.Shen, B.C.Sherwood, P.Skuja, A.Smith, A.M.Sobie, R.Soldner-Rembold, S.Spano, F.Stahl, A.Strom, David M.Strohmer, R.Tarem, S.Tasevsky, M.Teuscher, R.Thomson, M.A.Torrence, E.Toya, D.Tran, P.Trigger, I.Trocsanyi, Z.Tsur, E.Turner-Watson, M.F.Ueda, I.Ujvari, B.Vollmer, C.F.Vannerem, P.Vertesi, R.Verzocchi, M.Voss, H.Vossebeld, J.Ward, C.P.Ward, D.R.Watkins, P.M.Watson, A.T.Watson, N.K.Wells, P.S.Wengler, T.Wermes, N.Wilson, G.W.Wilson, J.A.Wolf, G.Wyatt, T.R.Yamashita, S.Zer-Zion, D.Zivkovic, LidijaMulti-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$Particle Physics - ExperimentEvents with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e- collisions at centre-of-mass energies in the range 192 - 209 GeV using the OPAL detector at LEP. Cross-section measurements are performed within the kinematic acceptance of the selection and compared with the expectation from the Standard Model process e+e- -> nu nu gamma gamma(gamma). No evidence for new physics contributions to this final state is observed. Upper limits on sigma (e+e- -> XX) BR^2(X -> Ygamma) are derived for the case of stable and invisible Y. In the case of massive Y the combined limits obtained from all the data range from 10 fb to 60 fb, while for the special case of massless Y the range is 20 fb to 40 fb. The limits apply to pair production of excited neutrions (X=nu^*,Y=nu), to neutralino production (X=~chi^0_2, Y=~chi^0_1) and to supersymmetric models in which X=~chi^0_1 and Y=~G is a light gravitino.Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e- collisions at centre-of-mass energies in the range 192 - 209 GeV using the OPAL detector at LEP. Cross-section measurements are performed within the kinematic acceptance of the selection and compared with the expectation from the Standard Model process e+e- -> nu nu gamma gamma(gamma). No evidence for new physics contributions to this final state is observed. Upper limits on sigma (e+e- -> XX) BR^2(X -> Ygamma) are derived for the case of stable and invisible Y. In the case of massive Y the combined limits obtained from all the data range from 10 fb to 60 fb, while for the special case of massless Y the range is 20 fb to 40 fb. The limits apply to pair production of excited neutrions (X=nu^*,Y=nu), to neutralino production (X=~chi^0_2, Y=~chi^0_1) and to supersymmetric models in which X=~chi^0_1 and Y=~G is a light gravitino.Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e− collisions at centre-of-mass energies in the range 192–209 GeV using the OPAL detector at LEP. Cross-section measurements are performed within the kinematic acceptance of the selection and compared with the expectations from the Standard Model process e+e−→νν¯γγ(γ) . No evidence for new physics contributions to this final state is observed. Upper limits on σ(e+e−→XX)⋅BR2(X→Yγ) are derived for the case of stable and invisible Y. In the case of massive Y the combined limits obtained from all the data range from 10 to 60 fb, while for the special case of massless Y the range is 20 to 40 fb. The limits apply to pair production of excited neutrinos ( X=ν*,Y=ν ), to neutralino production ( X=χ˜20,Y=χ˜10 ) and to supersymmetric models in which X=χ˜10 and Y=G˜ is a light gravitino.hep-ex/0412011CERN-PH-EP-2004-035oai:cds.cern.ch:7863672004 |
spellingShingle | Particle Physics - Experiment Abbiendi, G. Ainsley, C. Akesson, P.F. Alexander, G. Allison, John Amaral, P. Anagnostou, G. Anderson, K.J. Asai, S. Axen, D. Azuelos, G. Bailey, I. Barberio, E. Barillari, T. Barlow, R.J. Batley, R.J. Bechtle, P. Behnke, T. Bell, Kenneth Watson Bell, P.J. Bella, G. Bellerive, A. Benelli, G. Bethke, S. Biebel, O. Boeriu, O. Bock, P. Boutemeur, M. Braibant, S. Brigliadori, L. Brown, Robert M. Buesser, K. Burckhart, H.J. Campana, S. Carnegie, R.K. Carter, A.A. Carter, J.R. Chang, C.Y. Charlton, D.G. Ciocca, C. Csilling, A. Cuffiani, M. Dado, S. De Roeck, A. De Wolf, E.A. Desch, K. Dienes, B. Donkers, M. Dubbert, J. Duchovni, E. Duckeck, G. Duerdoth, I.P. Etzion, E. Fabbri, F. Feld, L. Ferrari, P. Fiedler, F. Fleck, I. Ford, M. Frey, A. Gagnon, P. Gary, John William Gaycken, G. Geich-Gimbel, C. Giacomelli, G. Giacomelli, P. Giunta, Marina Goldberg, J. Gross, E. Grunhaus, J. Gruwe, M. Gunther, P.O. Gupta, A. Hajdu, C. Hamann, M. Hanson, G.G. Harel, A. Hauschild, M. Hawkes, C.M. Hawkings, R. Hemingway, R.J. Herten, G. Heuer, R.D. Hill, J.C. Hoffman, Kara Dion Horvath, D. Igo-Kemenes, P. Ishii, K. Jeremie, H. Jovanovic, P. Junk, T.R. Kanaya, N. Kanzaki, J. Karlen, D. Kawagoe, K. Kawamoto, T. Keeler, R.K. Kellogg, R.G. Kennedy, B.W. Kluth, S. Kobayashi, T. Kobel, M. Komamiya, S. Kramer, T. Krieger, P. von Krogh, J. Kruger, K. Kuhl, T. Kupper, M. Lafferty, G.D. Landsman, H. Lanske, D. Layter, J.G. Lellouch, D. Lettso, J. Levinson, L. Lillich, J. Lloyd, S.L. Loebinger, F.K. Lu, J. Ludwig, A. Ludwig, J. Mader, W. Marcellini, S. Martin, A.J. Masetti, G. Mashimo, T. Mattig, Peter McKenna, J. McPherson, R.A. Meijers, F. Menges, W. Merritt, F.S. Mes, H. Meyer, Niels T. Michelini, A. Mihara, S. Mikenberg, G. Miller, D.J. Moed, S. Mohr, W. Mori, T. Mutter, A. Nagai, K. Nakamura, I. Nanjo, H. Neal, H.A. Nisius, R. O'Neale, S.W. Oh, A. Oreglia, M.J. Orito, S. Pahl, C. Pasztor, G. Pater, J.R. Pilcher, J.E. Pinfold, J. Plane, David E. Poli, B. Pooth, O. Przybycien, M. Quadt, A. Rabbertz, K. Rembser, C. Renkel, P. Roney, J.M. Rozen, Y. Runge, K. Sachs, K. Saeki, T. Sarkisyan, E.K.G. Schaile, A.D. Schaile, O. Scharff-Hansen, P. Schieck, J. Schorner-Sadenius, T. Schroder, Matthias Schumacher, M. Scott, W.G. Seuster, R. Shears, T.G. Shen, B.C. Sherwood, P. Skuja, A. Smith, A.M. Sobie, R. Soldner-Rembold, S. Spano, F. Stahl, A. Strom, David M. Strohmer, R. Tarem, S. Tasevsky, M. Teuscher, R. Thomson, M.A. Torrence, E. Toya, D. Tran, P. Trigger, I. Trocsanyi, Z. Tsur, E. Turner-Watson, M.F. Ueda, I. Ujvari, B. Vollmer, C.F. Vannerem, P. Vertesi, R. Verzocchi, M. Voss, H. Vossebeld, J. Ward, C.P. Ward, D.R. Watkins, P.M. Watson, A.T. Watson, N.K. Wells, P.S. Wengler, T. Wermes, N. Wilson, G.W. Wilson, J.A. Wolf, G. Wyatt, T.R. Yamashita, S. Zer-Zion, D. Zivkovic, Lidija Multi-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$ |
title | Multi-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$ |
title_full | Multi-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$ |
title_fullStr | Multi-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$ |
title_full_unstemmed | Multi-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$ |
title_short | Multi-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$ |
title_sort | multi-photon events with large missing energy in $e^{+}e^{-}$ collisions at $\sqrt{s}=192-209 gev$ |
topic | Particle Physics - Experiment |
url | https://dx.doi.org/10.1016/j.physletb.2004.09.059 http://cds.cern.ch/record/786367 |
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