Abstract
This paper describes a topological search for an invisibly decaying Higgs boson, H, produced via the Bjorken process (e+e-→HZ). The analysis is based on data recorded using the OPAL detector at LEP at centre-of-mass energies from 183 to 209 GeV corresponding to a total integrated luminosity of 629 pb-1. In the analysis only hadronic decays of the Z boson are considered. A scan over Higgs boson masses from 1 to 120 GeV and decay widths from 1 to 3000 GeV revealed no indication for a signal in the data. From a likelihood ratio of expected signal and standard model background we determine upper limits on cross-section times branching ratio to an invisible final state. For moderate Higgs boson decay widths, these range from about 0.07 pb (MH=60 GeV) to 0.57 pb (MH=114 GeV). For decay widths above 200 GeV the upper limits are of the order of 0.15 pb. The results can be interpreted in general scenarios predicting a large invisible decay width of the Higgs boson. As an example we interpret the results in the so-called stealthy Higgs scenario. The limits from this analysis exclude a large part of the parameter range of this scenario experimentally accessible at LEP 2.
| Original language | English |
|---|---|
| Pages (from-to) | 457-472 |
| Number of pages | 16 |
| Journal | European Physical Journal C |
| Volume | 49 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jan 2007 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Engineering (miscellaneous)
- Physics and Astronomy (miscellaneous)
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Search for invisibly decaying Higgs bosons with large decay width using the OPAL detector at LEP. / Abbiendi, G.; Ainsley, C.; Åkesson, P. F.; Alexander, G.; Anagnostou, G.; Anderson, K. J.; Asai, S.; Axen, D.; Bailey, I.; Barberio, E.; Barillari, T.; Barlow, R. J.; Batley, R. J.; Bechtle, P.; Behnke, T.; Bell, K. W.; Bell, P. J.; Bella, G.; Bellerive, A.; Benelli, G.; Bethke, S.; Biebel, O.; Boeriu, O.; Bock, P.; Boutemeur, M.; Braibant, S.; Brown, R. M.; Burckhart, H. J.; Campana, S.; Capiluppi, P.; 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.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Etzion, E.; Fabbri, F.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Gagnon, P.; Gary, J. W.; Geich-Gimbel, C.; Giacomelli, G.; Giacomelli, P.; Giunta, M.; Goldberg, J.; Gross, E.; Grunhaus, J.; Gruwé, M.; Gupta, A.; Hajdu, C.; Hamann, M.; Hanson, G. G.; Harel, A.; Hauschild, M.; Hawkes, C. M.; Hawkings, R.; Herten, G.; Heuer, R. D.; Hill, J. C.; Horváth, D.; Igo-Kemenes, P.; Ishii, K.; Jeremie, H.; Jovanovic, P.; Junk, T. R.; 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.; Krämer, T.; Krasznahorkay, A.; Krieger, P.; Von Krogh, J.; Kuhl, T.; Kupper, M.; Lafferty, G. D.; Landsman, H.; Lanske, D.; Lellouch, D.; Letts, J.; Levinson, L.; Lillich, J.; Lloyd, S. L.; Loebinger, F. K.; Lu, J.; Ludwig, A.; Ludwig, J.; Mader, W.; Marcellini, S.; Martin, A. J.; Mashimo, T.; Mättig, P.; McKenna, J.; McPherson, R. A.; Meijers, F.; Menges, W.; Merritt, F. S.; Mes, H.; Meyer, N.; Michelini, A.; Mihara, S.; Mikenberg, G.; Miller, D. J.; 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.; Pásztor, G.; Pater, J. R.; Pilcher, J. E.; Pinfold, J.; Plane, D. E.; Pooth, O.; Przybycień, M.; Quadt, A.; Rabbertz, K.; Rembser, C.; Renkel, P.; Roney, J. M.; Rossi, A. M.; Rozen, Y.; Runge, K.; Sachs, K.; Saeki, T.; Sarkisyan, E. K.G.; Schaile, A. D.; Schaile, O.; Scharff-Hansen, P.; Schieck, J.; Schörner-Sadenius, T.; Schröder, M.; Schumacher, M.; Seuster, R.; Shears, T. G.; Shen, B. C.; Sherwood, P.; Skuja, A.; Smith, A. M.; Sobie, R.; Söldner-Rembold, S.; Spano, F.; Stahl, A.; Strom, D.; Ströhmer, R.; Tarem, S.; Tasevsky, M.; Teuscher, R.; Thomson, M. A.; Torrence, E.; Toya, D.; Tran, P.; Trigger, I.; Trócsányi, Z.; Tsur, E.; Turner-Watson, M. F.; Ueda, I.; Ujvári, B.; Vollmer, C. F.; Vannerem, P.; Vértesi, 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, L.
In: European Physical Journal C, Vol. 49, No. 2, 01.2007, p. 457-472.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Search for invisibly decaying Higgs bosons with large decay width using the OPAL detector at LEP
AU - Abbiendi, G.
AU - Ainsley, C.
AU - Åkesson, P. F.
AU - Alexander, G.
AU - Anagnostou, G.
AU - Anderson, K. J.
AU - Asai, S.
AU - Axen, D.
AU - Bailey, I.
AU - Barberio, E.
AU - Barillari, T.
AU - Barlow, R. J.
AU - Batley, R. J.
AU - Bechtle, P.
AU - Behnke, T.
AU - Bell, K. W.
AU - Bell, P. J.
AU - Bella, G.
AU - Bellerive, A.
AU - Benelli, G.
AU - Bethke, S.
AU - Biebel, O.
AU - Boeriu, O.
AU - Bock, P.
AU - Boutemeur, M.
AU - Braibant, S.
AU - Brown, R. M.
AU - Burckhart, H. J.
AU - Campana, S.
AU - Capiluppi, P.
AU - Carnegie, R. K.
AU - Carter, A. A.
AU - Carter, J. R.
AU - Chang, C. Y.
AU - Charlton, D. G.
AU - Ciocca, C.
AU - Csilling, A.
AU - Cuffiani, M.
AU - Dado, S.
AU - De Roeck, A.
AU - De Wolf, E. A.
AU - Desch, K.
AU - Dienes, B.
AU - Dubbert, J.
AU - Duchovni, E.
AU - Duckeck, G.
AU - Duerdoth, I. P.
AU - Etzion, E.
AU - Fabbri, F.
AU - Ferrari, P.
AU - Fiedler, F.
AU - Fleck, I.
AU - Ford, M.
AU - Frey, A.
AU - Gagnon, P.
AU - Gary, J. W.
AU - Geich-Gimbel, C.
AU - Giacomelli, G.
AU - Giacomelli, P.
AU - Giunta, M.
AU - Goldberg, J.
AU - Gross, E.
AU - Grunhaus, J.
AU - Gruwé, M.
AU - Gupta, A.
AU - Hajdu, C.
AU - Hamann, M.
AU - Hanson, G. G.
AU - Harel, A.
AU - Hauschild, M.
AU - Hawkes, C. M.
AU - Hawkings, R.
AU - Herten, G.
AU - Heuer, R. D.
AU - Hill, J. C.
AU - Horváth, D.
AU - Igo-Kemenes, P.
AU - Ishii, K.
AU - Jeremie, H.
AU - Jovanovic, P.
AU - Junk, T. R.
AU - Kanzaki, J.
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 - Kobel, M.
AU - Komamiya, S.
AU - Krämer, T.
AU - Krasznahorkay, A.
AU - Krieger, P.
AU - Von Krogh, J.
AU - Kuhl, T.
AU - Kupper, M.
AU - Lafferty, G. D.
AU - Landsman, H.
AU - Lanske, D.
AU - Lellouch, D.
AU - Letts, J.
AU - Levinson, L.
AU - Lillich, J.
AU - Lloyd, S. L.
AU - Loebinger, F. K.
AU - Lu, J.
AU - Ludwig, A.
AU - Ludwig, J.
AU - Mader, W.
AU - Marcellini, S.
AU - Martin, A. J.
AU - Mashimo, T.
AU - Mättig, P.
AU - McKenna, J.
AU - McPherson, R. A.
AU - Meijers, F.
AU - Menges, W.
AU - Merritt, F. S.
AU - Mes, H.
AU - Meyer, N.
AU - Michelini, A.
AU - Mihara, S.
AU - Mikenberg, G.
AU - Miller, D. J.
AU - Mohr, W.
AU - Mori, T.
AU - Mutter, A.
AU - Nagai, K.
AU - Nakamura, I.
AU - Nanjo, H.
AU - Neal, H. A.
AU - Nisius, R.
AU - O'Neale, S. W.
AU - Oh, A.
AU - Oreglia, M. J.
AU - Orito, S.
AU - Pahl, C.
AU - Pásztor, G.
AU - Pater, J. R.
AU - Pilcher, J. E.
AU - Pinfold, J.
AU - Plane, D. E.
AU - Pooth, O.
AU - Przybycień, M.
AU - Quadt, A.
AU - Rabbertz, K.
AU - Rembser, C.
AU - Renkel, P.
AU - Roney, J. M.
AU - Rossi, A. M.
AU - Rozen, Y.
AU - Runge, K.
AU - Sachs, K.
AU - Saeki, T.
AU - Sarkisyan, E. K.G.
AU - Schaile, A. D.
AU - Schaile, O.
AU - Scharff-Hansen, P.
AU - Schieck, J.
AU - Schörner-Sadenius, T.
AU - Schröder, M.
AU - Schumacher, M.
AU - Seuster, R.
AU - Shears, T. G.
AU - Shen, B. C.
AU - Sherwood, P.
AU - Skuja, A.
AU - Smith, A. M.
AU - Sobie, R.
AU - Söldner-Rembold, S.
AU - Spano, F.
AU - Stahl, A.
AU - Strom, D.
AU - Ströhmer, R.
AU - Tarem, S.
AU - Tasevsky, M.
AU - Teuscher, R.
AU - Thomson, M. A.
AU - Torrence, E.
AU - Toya, D.
AU - Tran, P.
AU - Trigger, I.
AU - Trócsányi, Z.
AU - Tsur, E.
AU - Turner-Watson, M. F.
AU - Ueda, I.
AU - Ujvári, B.
AU - Vollmer, C. F.
AU - Vannerem, P.
AU - Vértesi, R.
AU - Verzocchi, M.
AU - Voss, H.
AU - Vossebeld, J.
AU - Ward, C. P.
AU - Ward, D. R.
AU - Watkins, P. M.
AU - Watson, A. T.
AU - Watson, N. K.
AU - Wells, P. S.
AU - Wengler, T.
AU - Wermes, N.
AU - Wilson, G. W.
AU - Wilson, J. A.
AU - Wolf, G.
AU - Wyatt, T. R.
AU - Yamashita, S.
AU - Zer-Zion, D.
AU - Zivkovic, L.
PY - 2007/1
Y1 - 2007/1
N2 - This paper describes a topological search for an invisibly decaying Higgs boson, H, produced via the Bjorken process (e+e-→HZ). The analysis is based on data recorded using the OPAL detector at LEP at centre-of-mass energies from 183 to 209 GeV corresponding to a total integrated luminosity of 629 pb-1. In the analysis only hadronic decays of the Z boson are considered. A scan over Higgs boson masses from 1 to 120 GeV and decay widths from 1 to 3000 GeV revealed no indication for a signal in the data. From a likelihood ratio of expected signal and standard model background we determine upper limits on cross-section times branching ratio to an invisible final state. For moderate Higgs boson decay widths, these range from about 0.07 pb (MH=60 GeV) to 0.57 pb (MH=114 GeV). For decay widths above 200 GeV the upper limits are of the order of 0.15 pb. The results can be interpreted in general scenarios predicting a large invisible decay width of the Higgs boson. As an example we interpret the results in the so-called stealthy Higgs scenario. The limits from this analysis exclude a large part of the parameter range of this scenario experimentally accessible at LEP 2.
AB - This paper describes a topological search for an invisibly decaying Higgs boson, H, produced via the Bjorken process (e+e-→HZ). The analysis is based on data recorded using the OPAL detector at LEP at centre-of-mass energies from 183 to 209 GeV corresponding to a total integrated luminosity of 629 pb-1. In the analysis only hadronic decays of the Z boson are considered. A scan over Higgs boson masses from 1 to 120 GeV and decay widths from 1 to 3000 GeV revealed no indication for a signal in the data. From a likelihood ratio of expected signal and standard model background we determine upper limits on cross-section times branching ratio to an invisible final state. For moderate Higgs boson decay widths, these range from about 0.07 pb (MH=60 GeV) to 0.57 pb (MH=114 GeV). For decay widths above 200 GeV the upper limits are of the order of 0.15 pb. The results can be interpreted in general scenarios predicting a large invisible decay width of the Higgs boson. As an example we interpret the results in the so-called stealthy Higgs scenario. The limits from this analysis exclude a large part of the parameter range of this scenario experimentally accessible at LEP 2.
UR - http://www.scopus.com/inward/record.url?scp=33846809107&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846809107&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-006-0170-x
DO - 10.1140/epjc/s10052-006-0170-x
M3 - Article
AN - SCOPUS:33846809107
VL - 49
SP - 457
EP - 472
JO - European Physical Journal C
JF - European Physical Journal C
SN - 1434-6044
IS - 2
ER -