Performance of the ALEPH detector at LEP

Buskulic, D.; Casper, D.; Bonis, I. De; Décamp, D.; Ghez, Philippe; Goy, C.; Lees, J. P.; Minard, M.-N.; Odier, P.; Pietrzyk, B.; Ariztizabal, F.; Chmeissani, M.; Crespo, J.M.; Efthymiopoulos, I.; Fernández, E.; Fernández-Bosman, M.; Gaitan, V.; Garrido, Ll.; Martı́nez, M.; Mattison, T. S.; Orteu, S.; Pacheco, A.; Padilla, C.; Palla, F.; Pascual, Á.; Perlas, J. A.; Sanchez, F. J. Munoz; Teubert, F.; Chiumarulo, F.; Clemente, A.; Creanza, D.; Palma, M. De; Farilla, A.; Ferorelli, R.; Iaselli, G.; Mäggi, G.; Marinelli, N.; Mastrogiacomo, A.; Natali, S.; Negro, V; Nuzzo, S.; Papagni, M.; Pinto, Chiara; Ranieri, A.; Raso, G.; Romanò, F.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Zito, G.; Chai, Y.; Huang, D.; Huang, X. T.; Lin, J.; Wang, T; Xie, Y.; Xu, D.; Xu, R.; Zhang, J; Zhang, L; Zhao, W.; Albrecht, H.; Ball, A. H.; Benetta, R.; Bird, F.; Blucher, E.; Bonvicini, G.; Boudreau, J.; Charity, T.; Comas, P.; Coyle, P.; Drevermann, H.; Engelhardt, A.; Ferro‐Luzzi, M.; Foà, L.; Forty, R.; Frank, M.; Ganis, G.; Gay, C.; Girone, M.; Grab, C.; Grabit, R.; Griffith, John; Grüb, R; Hagelberg, R.; Harvey, J.; Ivesdal, B; Jacobsen, R.G.; Jarron, P.; Jost, B.; Kasemann, M.; Kellner, G.; Knobloch, J.; Lacourt, A.; Lazeyras, P.; Lehraus, I.; Löfstedt, B.; Löhse, T.; Lütze, D; Maggi, M.; Marchioro, A.; Markou, C.; Martin, E. B.; Mató, P.; Maugain, J. M.; May, J.; Meinhard, H.; Mertens, Volker; Minten, A.; Miotto, A.; Miquel, R.; Palazzi, P.; Pater, J. R.; Perrodo, P.; Pintus, Ruggero; Pregernig, L.; Price, Michael; Pusztaszeri, J. F.; Ranjard, F.; Richstein, J.; Richter, W.; Rolandi, G.; Rotscheidt, H.; Rüden, W. von; Saich, M.; Santiard, J.C.; Schilly, P.; Schlatter, D.; Schmelling, M.; Stefanini, G.; Taureg, H.; Tejessy, W.; Tomalin, I. 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Y.; Passalacqua, L.; Poilleux, P.; Rougé, A.; Roy, C.; Rumpf, M.; Tanaka, R.; Valassi, A.; Verderi, M.; Videau, H.; Violet, C.E.; Candlin, D. J.; Main, A.; Parsons, M. I.; Veitch, E.; Focardi, E.; Parrini, G.; Scarlini, E.; Corden, M.; Delfino, M.; Georgiopoulos, C.; Jaffe, D. E.; Levinthal, D.; Anelli, M.; Antonelli, A.; Balla, A.; Bencivenni, G.; Bologna, G.; Bonini, R.; Bossi, F.; Campana, P.; Capon, G.; Carletti, M.; Cerutti, F.; Chiarella, V.; Corradi, G.; Dulach, B.; Felici, G.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, F.; Pepe-Altarelli, M.; Picchi, P.; Salomone, S.; Santoni, M.; Colrain, P.; Have, I. ten; Knowles, I. G.; Lynch, J.G.; Maitland, W.; Morton, W. T.; Raine, C.; Reeves, P.; Scarr, J. M.; Smith, K. M.; Smith, M. G.; Thompson, A. S.; Thorn, S.; Turnbull, R.M.; Becker, U.; Brandl, B.; Braun, O.; Geiges, R.; Geweniger, C.; Hanke, P.; Hepp, V.; Heyde, W; Kluge, E. 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M.; Benchouk, C.; Billaut, M; Bonissent, A.; Calvet, D.; Carr, J.; Diaconu, C.; Etienne, F.; Gally, Yves; Nicod, D.; Payre, P.; Roos, L.; Rousseau, D.; Schwemling, Ph.; Talby, M.; Abt, I.; Ackermann, K.; Adlung, S.; Assmann, R.; Bauer, C.; Becker, H.; Blum, W.; Brown, D. N.; Cattaneo, P. W.; Dehning, B.; Dietl, H.; Dydak, F.; Fischer, H. G.; Halley, A.W.; Hauff, D.; Holl, P.; Jakobs, K.; Kothhuber, W; Kroha, H.; Lauber, J.; Lütjens, G.; Lütz, G.; Männer, W.; Moser, H. G.; Richter, R.; Schröder, J.; Schwarz, A. S.; Settles, R.; Seywerd, H.; Stieg, H; Stiegler, U.; Stierlin, U.; Denis, R. St.; Strüder, L.; Waltermann, G.; Weissbach, P.; Wolf, G.; Albert, J; Alemany, R.; Arnault, C.; Bernier, R.; Boucrot, J.; Callot, O.; Chase, R. L.; Cordier, A.; Davier, M.; Dialinas, M.; Ducorps, A.; Duflot, L.; Grivaz, J.-F.; Heusse, P.; Janot, P.; Jean, P.; Kim, D.W; Diberder, F. Le; Lefrançois, J.; Lutz, A. M.; Musolino, G.; Park, H.J; Richer, J.P.; Schune, M. H.; Veillet, J. J.; Videau, I.; Abbaneo, D.; Avanzini, C.; Bagliesi, G.; Batignani, G.; Bechini, A.; Bosi, F.; Bottigli, U.; Bozzi, C.; Bradaschia, C.; Calderini, G.; Carpinelli, M.; Cerri, C.; Ciocci, M. A.; Ciulli, V.; Dell’Orso, R.; Fantechi, R.; Ferrante, I.; Fidecaro, F.; Forti, F.; Giassi, A.; Giorgi, M. A.; Gregorio, A.; Ligabue, F.; Lorenzini, R.; Lusiani, A.; Marrocchesi, P. S.; Messineo, A.; Pagani, G.; Pierazzini, G.; Profeti, A.; Rizzo, G.; Sanguinetti, G.; Spagnolo, P.; Steinberger, J.; Тенчини, Р.; Tonelli, G.; Triggiani, G.; Vannini, C.; Verdini, P. G.; Walsh, J.; Betteridge, A. P.; Gao, Y. S.; Green, M.G; Green, B.J; Johnson, D.; March, P.V.; Medcalf, T.; Mir, L. M.; Quazi, I. S.; Strong, J. A.; Bertín, V.; Bizzell, J.P.; Botterill, D.; Clifft, R. W.; Edgecock, T.R.; Haywood, S. J.; Edwards, M.; Norton, P. R.; Thompson, J.C.; Tucker, Armin W.; Bédérède, D.; Bernard, R.; Beuville, E.; Bloch-Devaux, B.; Colas, P.; Desportes, H.; Duarte, H.; Emery, S.; Gösset, L.; Heitzmann, J.; Jacquemet, Marcel; Joudon, A.; Kozanecki, W.; Lançon, E.; Lemaire, M. C.; Locci, E.; Lottin, J.C.; Micolon, P.; Pascual, JA García; Pérez, P.; Rander, J.; Renardy, J. F.; Rosowsky, A.; Roussarie, A.; Schuller, J. P.; Schwindling, J.; Mohand, D. Si; Vallage, B.; Johnson, R.P.; Litke, A. M.; Taylor, G. N.; Wear, J.; Beddall, A.; Booth, C. N.; Cartwright, S.; Combley, F.; Dawson, I.; Koksal, A.; Rankin, C.; Thompson, L.F.; Böhrer, A.; Brandt, Siegmund; Cowan, G.; Feigl, Eric O.; Gillessen, G.; Grupen, C.; Lutters, G.; Minguet-Rodriguez, J.; Rivera, F.; Saraiva, Pedro; Schäfer, U.; Smolík, L.; Bosisio, L.; Marina, R. Della; Giannini, G.; Gobbo, B.; Pitis, L.; Ragusa, F.; Rothberg, J.; Wasserbaech, S.; Bellantoni, L.; Caldwell, A.; Cinabro, D.; Conway, J.; Cowen, D. F.; Feng, Z.; Ferguson, D.P.S.; Grahl, J.; Harton, J. L.; Hayes, O.J.; Hu, H.; Izen, J. M.; Jared, R. C.; Müller, D.; Nachtman, J. M.; Pan, Y.; Saadi, Y.; Schmitt, M.; Scott, I.; Sharma, V.; Strom, D.; Takashima, M.; Turk, J. D.; Walsh, A. M.; Weber, F. V.; Wicklund, E.; Wu, S. L.; Wu, X.; Yamartino, J. M.; Zheng, M.; Zobernig, G.

doi:10.1016/0168-9002(95)00138-7

Cited by 343 publications

(104 citation statements)

References 17 publications

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“…Clusters reconstructed close to cracks between calorimeter modules, within the overlap region between barrel and endcaps, and at polar angles for which j cos j > 0:95 are rejected. An algorithm is then employed [13] which uses the ne granularity and longitudinal segmentation of the ECAL to recognise compact neutral objects within the clusters. Since the main background of the analysis arises from energetic 0 s where the decay photons overlap to form a single cluster, a large fraction are removed by requiring that only one compact object can be recognised in any candidate cluster.…”

Section: Selection Of Single Photon Clustersmentioning

confidence: 99%

“…The thrust axis of each e v ent is computed using all the \energy ow objects" [13] found. These objects are derived from all reconstructed charged particles, photons and neutral hadronic energy depositions in the electromagnetic (ECAL) and hadronic (HCAL) calorimeters, where due account is taken of redundancy in their corresponding momentum and energy measurements.…”

Section: Hadronic Event Selectionmentioning

confidence: 99%

See 1 more Smart Citation

First measurement of the quark-to-photon fragmentation function

Buskulic¹,

Casper²,

Bonis³

et al. 1995

Z. Phys. C - Particles and Fields

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Earlier measurements at LEP of isolated hard photons in hadronic Z decays, attributed to radiation from primary quark pairs, have been extended in the ALEPH experiment to include hard photon production inside hadron jets. Events are selected where all particles combine democratically to form hadron jets, one of which contains a photon with a fractional energy z 0:7. After statistical subtraction of non-prompt photons, the quark-to-photon fragmentation function, D(z), is extracted directly from the measured 2-jet rate. By taking into account the perturbative contributions to D(z) obtained from an O( S ) QCD calculation, the unknown non-perturbative component o f D ( z ) is then determined at high z. Provided due account is taken of hadronization e ects near z = 1, a good description of the other event topologies is then found.

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Section: Selection Of Single Photon Clustersmentioning

confidence: 99%

Section: Hadronic Event Selectionmentioning

confidence: 99%

First measurement of the quark-to-photon fragmentation function

Buskulic¹,

Casper²,

Bonis³

et al. 1995

Z. Phys. C - Particles and Fields

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“…This section briefly describes the most salient features of the aleph detector; detailed descriptions of the detector and its performance can be found elsewhere [1,2].…”

Section: Aleph Detectormentioning

confidence: 99%

“…An energy flow algorithm [2] combines the information from the tracking detectors and calorimeters and provides a list of reconstructed charged and neutral particles. These energy flow objects are used in the analysis described below.…”

Section: Aleph Detectormentioning

confidence: 99%

Measurement of the e+e−→ZZ production cross section at centre-of-mass energies of 183 and 189 GeV

Barate¹,

Décamp²,

Ghez³

et al. 1999

Physics Letters B

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“…The ALEPH detector and its performance are described in detail elsewhere [8,9]. Charged particles are measured over the polar angle | cos θ| < 0.966 by the cylindrical inner drift chamber, and the large cylindrical time projection chamber (TPC) which measures up to 21 threedimensional space points per track.…”

Section: The Aleph Detectormentioning

confidence: 99%

Measurement of the Dalitz-decay branching ratio of the π0

Beddall

2008

Eur. Phys. J. C

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Abstract. The ratio B = Γ (π 0 → e + e − γ)/Γ (π 0 → γγ) is measured by comparing the production rates of the π 0 in the two decay channels. The analysis is based on approximately four million hadronic decays of the Z boson recorded by the ALEPH detector in the years 1991 to 1995. The value of B is determined to be (1.140 ± 0.041)%. A recalculation of the Particle Data Group world average gives rise to a slightly improved error, and moves the world average closer to the theoretical value.

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Performance of the ALEPH detector at LEP

Cited by 343 publications

References 17 publications

First measurement of the quark-to-photon fragmentation function

First measurement of the quark-to-photon fragmentation function

Measurement of the e+e−→ZZ production cross section at centre-of-mass energies of 183 and 189 GeV

Measurement of the Dalitz-decay branching ratio of the π0

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