Observation of an excess in the search for the Standard Model Higgs boson at ALEPH

Barate, R.; Bonis, I. De; Décamp, D.; Ghez, Philippe; Goy, C.; Jézéquel, S.; Lees, J. P.; Martin, F. F.; Merle, E.; Minard, M.-N.; Pietrzyk, B.; Bravo, S.; Casado, M. P.; Chmeissani, M.; Crespo, J.M.; Fernández, E.; Fernández-Bosman, M.; Garrido, Ll.; Graugés, E.; Lopez, J. M.; Martı́nez, M.; Merino, G.; Miquel, R.; Mir, L. M.; Pacheco, A.; Paneque, D.; Ruiz, H.; Colaleo, A.; Creanza, D.; Filippis, N. De; Palma, M. De; Iaselli, G.; Mäggi, G.; Maggi, M.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Tricomi, A.; Zito, G.; Huang, X. T.; Lin, J.; Ouyang, Q.; Wang, T.; Xie, Ying; Xu, R.; Xue, She‐Sheng; Zhang, J.; Zhang, L.; Zhao, W.; Abbaneo, D.; Azzurri, P.; Barklow, T.; Boix, G.; Buchmüller, O.; Cattaneo, M.; Cerutti, F.; Clerbaux, B.; Dissertori, G.; Drevermann, H.; Forty, R.; Frank, M.; Gianotti, F.; Greening, T.C.; Hansen, J. B.; Harvey, J.; Hutchcroft, D.; Janot, P.; Jost, B.; Kado, M.; Lemaı̂tre, V.; Maley, P.; Mató, P.; Minten, A.; Moutoussi, A.; Ranjard, F.; Rolandi, G.; Schlatter, D.; Schmitt, M.; Schneider, O.; Spagnolo, P.; Tejessy, W.; Teubert, F.; Tournefier, E.; Valassi, A.; Ward, J. J.; Wright, A.E.; Ajaltouni, Z.; Badaud, F.; Dessagne, S.; Falvard, A.; Fayolle, D.; Henrard, P.; Jousset, J.; Michel, B.; Monteil, S.; Montret, Jean-Claude; Pallin, D.; Pascolo, J.M.; Perret, P.; Podlyski, F.; Hansen, J. D.; Hansen, P. H.; Nilsson, B.S.; Wäänänen, A.; Daskalakis, G.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Blondel, A.; Brient, J. C.; Machefert, F.; Rougé, A.; Swynghedauw, M.; Tanaka, R.; Videau, H.; Focardi, E.; Parrini, G.; Zachariadou, K.; Antonelli, A.; Antonelli, M.; Bencivenni, G.; Bologna, G.; Bossi, F.; Campana, P.; Capon, G.; Chiarella, V.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, F.; Passalacqua, L.; Pepe-Altarelli, M.; Chalmers, Matthew; Halley, A.W.; Kennedy, J.; Lynch, J.G.; Negus, P.; O’Shea, V.; Raeven, B.; Smith, D.; Teixeira-Dias, P.; Thompson, A. S.; Cavanaugh, R.; Dhamotharan, S.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E. E.; Leibenguth, G.; Putzer, A.; Tittel, K.; Werner, S.; Wunsch, M.; Beuselinck, R.; Binnie, D. M.; Cameron, W.; Davies, G.; Dornan, P. J.; Girone, M.; Marinelli, N.; Nowell, J.; Przysiezniak, H.; Sedgbeer, J. K.; Thompson, J.C.; Thomson, E.; White, R.; Ghete, V. M.; Girtler, P.; Kneringer, E.; Kühn, D.; Rudolph, G.; Bouhova-Thacker, E. V.; Bowdery, C. K.; Clarke, Danielle; Ellis, G.; Finch, A. J.; Foster, F.; Hughes, G.; Jones, Roger; Pearson, M. R.; Robertson, N. A.; Smižanská, M.; Giehl, I.; Hölldorfer, F.; Jakobs, K.; Kleinknecht, K.; Kröcker, M.; Müller, A.‐S.; Nürnberger, H.-A.; Quast, G.; Renk, B.; Rohne, E.; Sander, H. G.; Schmeling, S.; Wachsmuth, H.; Zeitnitz, C.; Ziegler, T.; Bonissent, A.; Carr, J.; Coyle, P.; Curtil, C.; Ealet, A.; Fouchez, D.; Leroy, O.; Kachelhoffer, T.; Payre, P.; Rousseau, D.; Tilquin, A.; Aleppo, M.; Gilardoni, S.; Ragusa, F.; David, A.; Dietl, H.; Ganis, G.; Heister, A.; Hüttmann, K.; Lütjens, G.; Mannert, C.; Männer, W.; Moser, H. G.; Schael, S.; Settles, R.; Stenzel, H.; Wolf, G.; Boucrot, J.; Callot, O.; Davier, M.; Duflot, L.; Grivaz, J.-F.; Heusse, P.; Jachołkowska, A.; Serin, L.; Veillet, J. J.; Videau, I.; Regie, J.B. De Vivie De; Yuan, C. Z.; Zerwas, D.; Bagliesi, G.; Boccali, T.; Calderini, G.; Ciulli, V.; Foà, L.; Giammanco, A.; Giassi, A.; Ligabue, F.; Messineo, A.; Palla, F.; Rizzo, G.; Sanguinetti, G.; Sciabà, A.; Sguazzoni, G.; Steinberger, J.; Тенчини, Р.; Venturi, A.; Verdini, P. G.; Blair, G.A.; Coles, Jane; Cowan, G.; Green, M.G.; Jones, L.T.; Medcalf, T.; Strong, J. A.; Clifft, R. W.; Edgecock, R.; Norton, P. R.; Tomalin, I. R.; Bloch-Devaux, B.; Boumediene, D.; Colas, P.; Fabbro, B.; Lançon, E.; Lemaire, M. C.; Locci, E.; Pérez, P.; Rander, J.; Renardy, J. F.; Rosowsky, A.; Seager, P.; Trabelsi, A.; Tuchming, B.; Vallage, B.; Konstantinidis, N.; Loomis, C.; Litke, A. M.; Taylor, G. N.; Booth, C. N.; Cartwright, S. L.; Combley, F.; Hodgson, P.; Lehto, M.; Thompson, L.F.; Affholderbach, K.; Böhrer, A.; Brandt, Siegmund; Grupen, C.; Heß, J.; Misiejuk, A.; Prange, G.; Sieler, U.; Borean, C.; Giannini, G.; Gobbo, B.; He, H.; Pütz, J.; Rothberg, J.; Wasserbaech, S.; Armstrong, S.R.; Cranmer, K.; Elmer, P.; Ferguson, D.P.S.; Gao, Y.; González, S.; Hayes, O.J.; Hu, H.; Jin, S.; Kile, J.; McNamara, P.A.; Nielsen, J.; Orejudos, W.; Pan, Y.; Saadi, Y.; Scott, I.; Shao, N.; Wimmersperg-Toeller, J. H. von; Walsh, J.; Wiedenmann, W.; Wu, Jian; Wu, S. L.; Wu, X.; Zobernig, G.

doi:10.1016/s0370-2693(00)01269-7

Cited by 165 publications

(131 citation statements)

References 17 publications

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“…The resulting lower limits on m H 1 and tan β in the full seven parameter theory change significantly compared with the CP-conserving MSSM. For example, if the model is CP-conserving the lower limit on the lightest Higgs mass is about 10% below the SM limit, but if the Higgs sector is CP-violating the lower limit can be an additional 10% lower (see also [770,771,772]). If a Higgs boson is found, then m H 1 and its σ × BR have been measured.…”

Section: After the Discovery: Deducing L Sof Tmentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

412

339

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After an introduction recalling the theoretical motivation for low energy (100 GeV to TeV scale) supersymmetry, this review describes the theory and experimental implications of the soft supersymmetry-breaking Lagrangian of the general minimal supersymmetric standard model (MSSM). Extensions to include neutrino masses and nonminimal theories are also discussed. Topics covered include models of supersymmetry breaking, phenomenological constraints from electroweak symmetry breaking, flavor/CP violation, collider searches, and cosmological constraints including dark matter and implications for baryogenesis and inflation.

show abstract

Section: After the Discovery: Deducing L Sof Tmentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

412

339

View full text Add to dashboard Cite

show abstract

“…The lightest neutral CP-even Higgs particle h resembles the SM Higgs boson in most regions of parameter space of broken supersymmetry [1]. Direct experimental searches at the CERN Large Electron Positron Collider (LEP) based on the presumption of significant decay branching ratio into bottom (b) quarks place the mass of a SM-like Higgs state above approximately 115 GeV [2]. An alternative analysis, based on the assumption of Higgs boson decay into hadronic jets, without b-tagging, provides a bound of about 113 GeV [3].…”

Section: Introductionmentioning

confidence: 99%

Differential cross section for Higgs boson production including all-orders soft gluon resummation

Berger

Qiu

2003

Phys. Rev. D

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The transverse momentum Q T distribution is computed for inclusive Higgs boson production at the energy of the CERN Large Hadron Collider. We focus on the dominant gluon-gluon subprocess in perturbative quantum chromodynamics and incorporate contributions from the quark-gluon and quark-antiquark channels. Using an impact-parameter b-space formalism, we include allorders resummation of large logarithms associated with emission of soft gluons. Our resummed results merge smoothly at large Q T with the fixed-order expectations in perturbative quantum chromodynamics, as they should, with no need for a matching procedure. They show a high degree of stability with respect to variation of parameters associated with the non-perturbative input at low Q T . We provide distributions dσ/dydQ T for Higgs boson masses from M Z to 200 GeV. The average transverse momentum at zero rapidity y grows approximately linearly with mass of the Higgs boson over the range M Z < m h < 200 GeV, < Q T >≃ 0.18m h + 18 GeV. We provide analogous results for Z boson production, for which we compute < Q T >≃ 25 GeV. The harder transverse momentum distribution for the Higgs boson arises because there is more soft gluon radiation in Higgs boson production than in Z

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“…From the electron-positron colliding accelerator LEP at CERN, there is preliminary experimental evidence that M is about 115 GeV/c 2 [18,19]. Thus, the condition (5) can be written as…”

Section: Formulation Of the Phenomenological Model -Step 1 (Preliminamentioning

confidence: 99%

“…Because of (18), it is convenient to apply a Lorentz transformation in the z-direction to go to a new frame where…”

Section: Formulation Of the Phenomenological Model -Step 1 (Preliminamentioning

confidence: 99%

“…There are two major differences between the previous two subsections and the next three. First, in these three subsections including the present one, the Higgs particle will be taken to be relatively light, so that the decays are relevant to the mass of 115 GeV/c 2 , as indicated by the preliminary experimental evidence from the LEP accelerator [18,19]. Secondly, consider the case of bb for this subsection.…”

Section: H → Bbmentioning

confidence: 99%

See 1 more Smart Citation

Higgs production at the large hadron collider: Phenomenological model and theoretical predictions

Gastmans

2011

Nuclear Physics B

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Using the results from relativistic gauge field theory, a phenomenological model is developed for the production of an isolated Higgs particle H. The specific process is p+p → A+H +B, where the group of particles A (B) mostly goes down one (the other) beam pipe. The theory and the phenomenology apply when the center-of-mass energy √ s ≫ M ≫ m, with M and m the masses of the Higgs particle and the proton respectively. Thus, there are two large parameters, namely √ s/M and M/m. That M ≫ m plays a central role. This phenomenological model is applied to the Large Hadron Collider (LHC) to predict the differential production cross sections. With high probability, this isolated Higgs particle is produced with a small transverse momentum of the order of 1 GeV/c. Because of this fact and the relatively small number of observed particles in such events, the method of data analysis is different from those developed so far for Higgs detection. These events can be described as due to Pomeron-Pomeron annihilation, and are 'clean' in the sense that those from TeV linear colliders are called 'clean'. The LHC, with its center-of-mass design energy of 14 TeV and its design luminosity of 10 34 cm −2 s −1 , can function exceptionally well as a Pomeron collider.

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Observation of an excess in the search for the Standard Model Higgs boson at ALEPH

Cited by 165 publications

References 17 publications

The soft supersymmetry-breaking Lagrangian: theory and applications

The soft supersymmetry-breaking Lagrangian: theory and applications

Differential cross section for Higgs boson production including all-orders soft gluon resummation

Higgs production at the large hadron collider: Phenomenological model and theoretical predictions

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