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Study of the subjet structure of quark and gluon jets
Authors :
BUSKULIC D CASPER D DEBONIS I DECAMP D GHEZ P GOY C LEES JP MINARD MN ODIER P PIETRZYK B ARIZTIZABAL F CHMEISSANI M CRESPO JM EFTHYMIOPOULOS I FERNANDEZ E FERNANDEZBOSMAN M GAITAN V GARRIDO L MARTINEZ M ORTEU S PACHECO A PADILLA C PALLA F PASCUAL A PERLAS JA SANCHEZ F TEUBERT F CREANZA D DEPALMA M FARILLA A IASELLI G MAGGI G MARINELLI N NATALI S NUZZO S RANIERI A RASO G ROMANO F RUGGIERI F SELVAGGI G SILVESTRIS L TEMPESTA P ZITO G HUANG X LIN J OUYANG Q WANG T XIE Y XU R XUE S ZHANG J ZHANG L ZHAO W BONVICINI G CATTANEO M COMAS P COYLE P DREVERMANN H ENGELHARDT A FORTY RW FRANK M GANIS G GIRONE M HAGELBERG R HARVEY J JACOBSEN R JOST B KNOBLOCH J LEHRAUS I MAGGI M MARKOU C MARTIN EB MATO P MEINHARD H MINTEN A MIQUEL R PALAZZI P PATER JR PERRODO P PUSZTASZERI JF RANJARD F SCHLATTER D SCHMELLING M TEJESSY W TOMALIN IR VEENHOF R VENTURI A WACHSMUTH H WIEDENMANN W WILDISH T WITZELING W WOTSCHACK J AJALTOUNI Z BARDADINOTWINOWSKA M BARRES A BOYER C FALVARD A GAY P GUICHENEY C HENRARD P JOUSSET J MICHEL B MONTEIL S MONTRET JC PALLIN D PERRET P PODLYSKI F PRORIOL J ROSSIGNOL JM SAADI F FEARNLEY T HANSEN JB HANSEN JD HANSEN JR HANSEN PH JOHNSON SD NILSSON BS KYRIAKIS A SIMOPOULOU E SIOTIS I VAYAKI A ZACHARIADOU K BLONDEL A BONNEAUD G BRIENT JC BOURDON P PASSALACQUA L ROUGE A RUMPF M TANAKA R VALASSI A VERDERI M VIDEAU H CANDLIN DJ PARSONS MI VEITCH E FOCARDI E PARRINI G CORDON M DELFINO M GEORGIOPOULOS C JAFFE DE ANTONELLI A BENCIVENNI G BOLOGNA G BOSSI F CAMPANA P CAPON G CERUTTI F CHIARELLA V FELICI G LAURELLI P MANNOCCHI G MURTAS F MURTAS GP PEPEALTARELLI M SALOMONE S COLRAIN P TENHAVE I KNOWLES IG LYNCH JG MAITLAND W MORTON WT RAINE C REEVES P SCARR JM SMITH K SMITH MG THOMPSON AS THORN S TURNBULL RM BECKER U BRAUN O GEWENIGER C GRAEFE G HANKE P HEPP V KLUGE EE PUTZER A RENSCH B SCHMIDT M SOMMER J STENZEL H TITTEL K WUNSCH M BEUSELINCK R BINNIE DM CAMERON W COLLING DJ DORNAN PJ KONSTANTINIDIS N MONETA L MOUTOUSSI A NASH J SANMARTIN G SEDGBEER JK STACEY AM DISSERTORI G GIRTLER P KNERINGER E KUHN D RUDOLPH G BOWDERY CK BRODBECK TJ FINCH AJ FOSTER F HUGHES G JACKSON D KEEMER NR NUTTALL M PATEL A SLOAN T SNOW SW WHELAN EP GALLA A GREENE AM KLEINKNECHT K RAAB J RENK B SANDER HG SCHMIDT H WALTHER SM WANKE R WOLF B AUBERT JJ BENCHEIKH AM BENCHOUK C BONISSENT A BUJOSA G CALVET D CARR J DIACONU C ETIENNE F THULASIDAS M NICOD D PAYRE P ROUSSEAU D TALBY M ABT I ASSMANN R BAUER C BLUM W BROWN D DIETL H DYDAK F GOTZHEIN C HALLEY AW JAKOBS K KROHA H LUTJENS G LUTZ G MANNER W MOSER HG RICHTER R ROSADOSCHLOSSER A SCHWARZ AS SETTLES R SEYWERD H STIERLIN U STDENIS R WOLF G ALEMANY R BOUCROT J CALLOT O CORDIER A COURAULT F DAVIER M DUFLOT L GRIVAZ JF HEUSSE P JACQUET M JANOT P KIM DW LEDIBERDER F LEFRANCOIS J LUTZ AM MUSOLINO G NIKOLIC I PARK HJ PARK IC SCHUNE MH SIMION S VEILLET JJ VIDEAU I ABBANEO D BAGLIESI G BATIGNANI G BETTARINI S BOTTIGLI U BOZZI C CALDERINI G CARPINELLI M CIOCCI MA CIULLI V DELLORSO R FERRANTE I FIDECARO F FOA L FORTI F GIASSI A GIORGI MA GREGORIO A LUSIANI, Alberto MARROCCHESI PS MESSINEO A RIZZO G SANGUINETTI G SCIABA A SPAGNOLO P STEINBERGER J TENCHINI R TONELLI G TRIGGIANI G VANNINI C VERDINI PG WALSH J BETTERIDGE AP BLAIR GA BRYANT LM GAO Y GREEN MG JOHNSON DL MEDCALF T MIR LM STRONG JA BERTIN V BOTTERILL DR CLIFFT RW EDGECOCK TR HAYWOOD S EDWARDS M MALEY P NORTON PR THOMPSON JC BLOCHDEVAUX B COLAS P DUARTE H EMERY S KOZANECKI W LANCON E LEMAIRE MC LOCCI E MARX B PEREZ P RANDER J RENARDY JF ROSOWSKY A ROUSSARIE A SCHULLER JP SCHWINDLING J SIMOHAND D TRABELSI A VALLAGE B JOHNSON RP LITKE AM TAYLOR G WEAR J BEDDALL A BOOTH CN BOSWELL R CARTWRIGHT S COMBLEY F DAWSON I KOKSAL A LETHO M NEWTON WM RANKIN C THOMPSON LF BOHRER A BRANDT S COWAN G FEIGL E GRUPEN C LUTTERS G MINGUETRODRIGUEZ J RIVERA F SARAIVA P SCHAFER U SMOLIK L BOSISIO L DELLAMARINA R GIANNINI G GOBBO B PITIS L RAGUSA F KIM H ROTHBERG J WASSERBAECH S ARMSTRONG SR BELLANTONI L ELMER P FENG Z FERGUSON DPS GAO YS GONZALEZ S GRAHL J HARTON JL HAYES OJ HU H MCNAMARA PA NACHTMAN JM OREJUDOS W PAN YB SAADI Y SCHMITT M SCOTT IJ SHARMA V TURK JD WALSH AM WEBER FV WU SL WU X YAMARTINO JM ZHENG M ZOBERNIG G RI ANTONELLI ANTONELLA/C 6238 2011 Passalacqua Luca/F 5127 2011 Murtas Fabrizio/B 5729 2012 S.t. Denis Richard/C 8997 2012 Ferrante Isidoro/F 1017 2012 Sanchez Federico/F 5809 2012 ROLANDI, LUIGI LIGABUE, FRANCO Laboratoire d'Annecy de Physique des Particules (LAPP) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Leprince-Ringuet (LLR) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS) Centre de Physique des Particules de Marseille (CPPM) Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de l'Accélérateur Linéaire (LAL) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) ALEPH Buskulic, D Casper, D Debonis, I Decamp, D Ghez, P Goy, C Lees, Jp Minard, Mn Odier, P Pietrzyk, B Ariztizabal, F Chmeissani, M Crespo, Jm Efthymiopoulos, I Fernandez, E Fernandezbosman, M Gaitan, V Garrido, L Martinez, M Orteu, S Pacheco, A Padilla, C Palla, F Pascual, A Perlas, Ja Sanchez, F Teubert, F Creanza, D Depalma, M Farilla, A Iaselli, G Maggi, G Marinelli, N Natali, S Nuzzo, S Ranieri, A Raso, G Romano, F Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Zito, G Huang, X Lin, J Ouyang, Q Wang, T Xie, Y Xu, R Xue, S Zhang, J Zhang, L Zhao, W Bonvicini, G Cattaneo, M Comas, P Coyle, P Drevermann, H Engelhardt, A Forty, Rw Frank, M Ganis, G Girone, M Hagelberg, R Harvey, J Jacobsen, R Jost, B Knobloch, J Lehraus, I Maggi, M Markou, C Martin, Eb Mato, P Meinhard, H Minten, A Miquel, R Palazzi, P Pater, Jr Perrodo, P Pusztaszeri, Jf Ranjard, F Rolandi, Luigi Schlatter, D Schmelling, M Tejessy, W Tomalin, Ir Veenhof, R Venturi, A Wachsmuth, H Wiedenmann, W Wildish, T Witzeling, W Wotschack, J Ajaltouni, Z Bardadinotwinowska, M Barres, A Boyer, C Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, Jc Pallin, D Perret, P Podlyski, F Proriol, J Rossignol, Jm Saadi, F Fearnley, T Hansen, Jb Hansen, Jd Hansen, Jr Hansen, Ph Johnson, Sd Nilsson, B Kyriakis, A Simopoulou, E Siotis, I Vayaki, A Zachariadou, K Blondel, A Bonneaud, G Brient, Jc Bourdon, P Passalacqua, L Rouge, A Rumpf, M Tanaka, R Valassi, A Verderi, M Videau, H Candlin, Dj Parsons, Mi Veitch, E Focardi, E Parrini, G Cordon, M Delfino, M Georgiopoulos, C Jaffe, De Antonelli, A Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Cerutti, F Chiarella, V Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, Gp Pepealtarelli, M Salomone, S Colrain, P Tenhave, I Knowles, Ig Lynch, Jg Maitland, W Morton, Wt Raine, C Reeves, P Scarr, Jm Smith, K Smith, Mg Thompson, A Thorn, S Turnbull, Rm Becker, U Braun, O Geweniger, C Graefe, G Hanke, P Hepp, V Kluge, Ee Putzer, A Rensch, B Schmidt, M Sommer, J Stenzel, H Tittel, K Wunsch, M Beuselinck, R Binnie, Dm Cameron, W Colling, Dj Dornan, Pj Konstantinidis, N Moneta, L Moutoussi, A Nash, J Sanmartin, G Sedgbeer, Jk Stacey, Am Dissertori, G Girtler, P Kneringer, E Kuhn, D Rudolph, G Bowdery, Ck Brodbeck, Tj Finch, Aj Foster, F Hughes, G Jackson, D Keemer, Nr Nuttall, M Patel, A Sloan, T Snow, Sw Whelan, Ep Galla, A Greene, Am Kleinknecht, K Raab, J Renk, B Sander, Hg Schmidt, H Walther, Sm Wanke, R Wolf, B Aubert, Jj Bencheikh, Am Benchouk, C Bonissent, A Bujosa, G Calvet, D Carr, J Diaconu, C Etienne, F Thulasidas, M Nicod, D Payre, P Rousseau, D Talby, M Abt, I Assmann, R Bauer, C Blum, W Brown, D Dietl, H Dydak, F Gotzhein, C Halley, Aw Jakobs, K Kroha, H Lutjens, G Lutz, G Manner, W Moser, Hg Richter, R Rosadoschlosser, A Schwarz, A Settles, R Seywerd, H Stierlin, U Stdenis, R Wolf, G Alemany, R Boucrot, J Callot, O Cordier, A Courault, F Davier, M Duflot, L Grivaz, Jf Heusse, P Jacquet, M Janot, P Kim, Dw Lediberder, F Lefrancois, J Lutz, Am Musolino, G Nikolic, I Park, Hj Park, Ic Schune, Mh Simion, S Veillet, Jj Videau, I Abbaneo, D Bagliesi, G Batignani, G Bettarini, S Bottigli, U Bozzi, C Calderini, G Carpinelli, M Ciocci, Ma Ciulli, V Dellorso, R Ferrante, I Fidecaro, F Foa, L Forti, F Giassi, A Giorgi, Ma Gregorio, A Ligabue, Franco Lusiani, Alberto Marrocchesi, P Messineo, A Rizzo, G Sanguinetti, G Sciaba, A Spagnolo, P Steinberger, J Tenchini, R Tonelli, G Triggiani, G Vannini, C Verdini, Pg Walsh, J Betteridge, Ap Blair, Ga Bryant, Lm Gao, Y Green, Mg Johnson, Dl Medcalf, T Mir, Lm Strong, Ja Bertin, V Botterill, Dr Clifft, Rw Edgecock, Tr Haywood, S Edwards, M Maley, P Norton, Pr Thompson, Jc Blochdevaux, B Colas, P Duarte, H Emery, S Kozanecki, W Lancon, E Lemaire, Mc Locci, E Marx, B Perez, P Rander, J Renardy, Jf Rosowsky, A Roussarie, A Schuller, Jp Schwindling, J Simohand, D Trabelsi, A Vallage, B Johnson, Rp Litke, Am Taylor, G Wear, J Beddall, A Booth, Cn Boswell, R Cartwright, S Combley, F Dawson, I Koksal, A Letho, M Newton, Wm Rankin, C Thompson, Lf Bohrer, A Brandt, S Cowan, G Feigl, E Grupen, C Lutters, G Minguetrodriguez, J Rivera, F Saraiva, P Schafer, U Smolik, L Bosisio, L Dellamarina, R Giannini, G Gobbo, B Pitis, L Ragusa, F Kim, H Rothberg, J Wasserbaech, S Armstrong, Sr Bellantoni, L Elmer, P Feng, Z Ferguson, Dp Gonzalez, S Grahl, J Harton, Jl Hayes, Oj Hu, H Mcnamara, Pa Nachtman, Jm Orejudos, W Pan, Yb Saadi, Y Schmitt, M Scott, Ij Sharma, V Turk, Jd Walsh, Am Weber, Fv Wu, Sl Wu, X Yamartino, Jm Zheng, M Zobernig, G Denis Richard/C 8997 2012 Ferrante Isidoro/F 1017 2012 Sanchez Federico/F 5809 2012, RI ANTONELLI ANTONELLA/C 6238 2011 Passalacqua Luca/F 5127 2011 Murtas Fabrizio/B 5729 2012 S. t. Lees, J Minard, M Crespo, J Perlas, J Forty, R Martin, E Pater, J Pusztaszeri, J Rolandi, L Tomalin, I Montret, J Rossignol, J Hansen, J Hansen, P Johnson, S Brient, J Candlin, D Parsons, M Jaffe, D Murtas, G Knowles, I Lynch, J Morton, W Scarr, J Smith, M Turnbull, R Kluge, E Binnie, D Colling, D Dornan, P Sedgbeer, J Stacey, A Bowdery, C Brodbeck, T Finch, A Keemer, N Snow, S Whelan, E Greene, A Sander, H Walther, S Aubert, J Bencheikh, A Halley, A Moser, H Grivaz, J Kim, D Lutz, A Park, H Park, I Schune, M Veillet, J Ciocci, M Giorgi, M Ligabue, F Lusiani, A Verdini, P Betteridge, A Blair, G Bryant, L Green, M Johnson, D Mir, L Strong, J Botterill, D Clifft, R Edgecock, T Norton, P Thompson, J Lemaire, M Renardy, J Schuller, J Johnson, R Litke, A Booth, C Newton, W Thompson, L Armstrong, S Ferguson, D Harton, J Hayes, O Mcnamara, P Nachtman, J Pan, Y Scott, I Turk, J Walsh, A Weber, F Wu, S Yamartino, J Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11) D., Buskulic D., Casper I., De Boni D., Decamp P., Ghez C., Goy J. P., Lee M. N., Minard P., Odier B., Pietrzyk F., Ariztizabal M., Chmeissani J. M., Crespo I., Efthymiopoulo E., Fernandez M., Fernandez Bosman V., Gaitan Garrido, L. l. M., Martinez S., Orteu A., Pacheco C., Padilla F., Palla A., Pascual J. A., Perla F., Sanchez F., Teubert D., Creanza M., de Palma A., Farilla G., Iaselli G., Maggi N., Marinelli S., Natali S., Nuzzo A., Ranieri G., Raso F., Romano F., Ruggieri G., Selvaggi L., Silvestri P., Tempesta G., Zito X., Huang J., Lin Q., Ouyang T., Wang Y., Xie R., Xu S., Xue J., Zhang L., Zhang W., Zhao G., Bonvicini M., Cattaneo P., Coma P., Coyle H., Drevermann A., Engelhardt R. W., Forty M., Frank G., Gani M., Girone R., Hagelberg J., Harvey R., Jacobsen B., Jost J., Knobloch I., Lehrau M., Maggi C., Markou E. B., Martin P., Mato H., Meinhard A., Minten R., Miquel P., Palazzi J. R., Pater P., Perrodo J. F., Pusztaszeri F., Ranjard L., Rolandi D., Schlatter M., Schmelling W., Tejessy I. R., Tomalin R., Veenhof A., Venturi H., Wachsmuth W., Wiedenmann T., Wildish W., Witzeling J., Wotschack Z., Ajaltouni M., Bardadin Otwinowska A., Barre C., Boyer A., Falvard P., Gay C., Guicheney P., Henrard J., Jousset B., Michel S., Monteil J. C., Montret D., Pallin P., Perret F., Podlyski J., Proriol J. M., Rossignol F., Saadi T., Fearnley J. B., Hansen J. D., Hansen J. R., Hansen P. H., Hansen S. D., Johnson B. S., Nilsson A., Kyriaki E., Simopoulou I., Sioti A., Vayaki K., Zachariadou A., Blondel G., Bonneaud J. C., Brient P., Bourdon L., Passalacqua A., Rougé M., Rumpf R., Tanaka A., Valassi M., Verderi H., Videau D. J., Candlin M. I., Parson E., Veitch E., Focardi G., Parrini M., Corden M., Delfino C., Georgiopoulo D. E., Jaffe A., Antonelli G., Bencivenni G., Bologna F., Bossi P., Campana G., Capon F., Cerutti V., Chiarella G., Felici P., Laurelli G., Mannocchi F., Murta G. P., Murta M., Pepe Altarelli S., Salomone P., Colrain I., ten Have I. G., Knowle J. G., Lynch W., Maitland W. T., Morton C., Raine P., Reeve J. M., Scarr K., Smith M. G., Smith A. S., Thompson S., Thorn R. M., Turnbull U., Becker O., Braun C., Geweniger G., Graefe P., Hanke V., Hepp E. E., Kluge A., Putzer B., Rensch M., Schmidt J., Sommer H., Stenzel K., Tittel M., Wunsch R., Beuselinck D. M., Binnie W., Cameron D. J., Colling P. J., Dornan N., Konstantinidi L., Moneta A., Moutoussi J., Nash G., San Martin J. K., Sedgbeer A. M., Stacey G., Dissertori P., Girtler E., Kneringer D., Kuhn G., Rudolph C. K., Bowdery T. J., Brodbeck A. J., Finch F., Foster G., Hughe D., Jackson N. R., Keemer M., Nuttall A., Patel T., Sloan S. W., Snow E. P., Whelan A., Galla A. M., Greene K., Kleinknecht J., Raab B., Renk H. G., Sander H., Schmidt S. M., Walther R., Wanke B., Wolf J. J., Aubert A. M., Bencheikh C., Benchouk A., Bonissent G., Bujosa D., Calvet J., Carr C., Diaconu F., Etienne M., Thulasida D., Nicod P., Payre D., Rousseau M., Talby I., Abt R., Assmann C., Bauer W., Blum D., Brown H., Dietl F., Dydak C., Gotzhein A. W., Halley K., Jakob H., Kroha G., Lütjen G., Lutz W., Männer H. G., Moser R., Richter A., Rosado Schlosser A. S., Schwarz R., Settle H., Seywerd U., Stierlin Denis, R. S. t. G., Wolf R., Alemany J., Boucrot O., Callot A., Cordier F., Courault M., Davier L., Duflot J. F., Grivaz Heusse, P. h. M., Jacquet P., Janot D. W., Kim F., Le Diberder J., Lefrançoi A. M., Lutz G., Musolino I., Nikolic H. J., Park I. C., Park M. H., Schune S., Simion J. J., Veillet I., Videau D., Abbaneo G., Bagliesi G., Batignani S., Bettarini U., Bottigli C., Bozzi G., Calderini M., Carpinelli M. A., Ciocci V., Ciulli R., Dell'Orso I., Ferrante F., Fidecaro L., Foà F., Forti A., Giassi M. A., Giorgi Gregorio, Anna F., Ligabue A., Lusiani P. S., Marrocchesi A., Messineo G., Rizzo G., Sanguinetti A., Sciabà P., Spagnolo J., Steinberger R., Tenchini G., Tonelli G., Triggiani C., Vannini P. G., Verdini J., Walsh A. P., Betteridge G. A., Blair L. M., Bryant Y., Gao M. G., Green D. L., Johnson T., Medcalf Mir, L. l. M. J. A., Strong V., Bertin D. R., Botterill R. W., Clifft T. R., Edgecock S., Haywood M., Edward P., Maley P. R., Norton J. C., Thompson B., Bloch Devaux P., Cola H., Duarte S., Emery W., Kozanecki E., Lançon M. C., Lemaire E., Locci B., Marx P., Perez J., Rander J. F., Renardy A., Rosowsky A., Roussarie J. P., Schuller J., Schwindling D., Si Mohand A., Trabelsi B., Vallage R. P., Johnson A. M., Litke G., Taylor J., Wear A., Beddall C. N., Booth R., Boswell S., Cartwright F., Combley I., Dawson A., Koksal M., Letho W. M., Newton C., Rankin L. F., Thompson A., Böhrer S., Brandt G., Cowan E., Feigl C., Grupen G., Lutter J., Minguet Rodriguez F., Rivera P., Saraiva U., Schäfer L., Smolik Bosisio, Luciano R., Della Marina Giannini, Gianrossano B., Gobbo L., Piti F., Ragusa H., Kim J., Rothberg S., Wasserbaech S. R., Armstrong L., Bellantoni P., Elmer Z., Feng D. P. S., Ferguson Y. S., Gao S., González J., Grahl J. L., Harton O. J., Haye H., Hu P. A., Mcnamara J. M., Nachtman W., Orejudo Y. B., Pan Y., Saadi M., Schmitt I. J., Scott V., Sharma J. D., Turk A. M., Walsh F. V., Weber Sau Lan, Wu X., Wu J. M., Yamartino M., Zheng G., Zobernig
Source :
Physics Letters B, Physics Letters B, 1995, 346, pp.389-398, Physics Letters B, Elsevier, 1995, 346, pp.389-398
Publication Year :
1994
Abstract
Measurements of the subjet structure of quark and gluon jets in hadronic Z decays are presented. The analysis is based on one million hadronic events recorded by the ALEPH detector. Roughly symmetric three-jet events are selected with a coarse jet-resolution cut-off, y(1). Gluon jets are identified with a purity of 94.6% in those events where evidence of long-lived heavy-flavour hadrons in the other two jets is found. The jets are then analyzed using a smaller cut-off y(0) (< y(1)) so that subjets are resolved. The properties of the jets (subjet multiplicities [N-q], [N-g] and rates R(n)(g(q)) for n = 1,2,3,4) are determined and are found to be in good agreement with the expectations of perturbative QCD as long as the subjet resolution parameter y(0) is sufficiently large to keep non-perturbative effects small. In particular, the ratio [N-g - 1]/[N-q - 1], which to leading order in QCD is given by the ratio of colour factors C-A/C-F = 9/4, is measured to be 1.96 +/- 0.15 for y(0) = 2 . 10(-3), but falls to 1.29 +/- 0.03 for y(0) = 1.6 . 10(-5).
Details
Language :
English
ISSN :
03702693
Database :
OpenAIRE
Journal :
Physics Letters B, Physics Letters B, 1995, 346, pp.389-398, Physics Letters B, Elsevier, 1995, 346, pp.389-398
Accession number :
edsair.doi.dedup.....06f740e62f69f673079280138d2cc55e