Charged jet evolution and the underlying event in proton-antiproton collisions at 1.8 TeV

Affolder, A. A.; Akimoto, H.; Akopian, A.; Albrow, M.; Amaral, P.; Amidei, D.; Anikeev, K.; Antos̆, J.; Apollinari, G.; Arisawa, T.; Artikov, A.; Asakawa, T.; Ashmanskas, W.; Azfar, F.; Azzi, P.; Bacchetta, N.; Bachacou, H.; Bailey, S.; Barbaro, P. de; Barbaro‐Galtieri, A.; Barnes, V. E.; Barnett, B. A.; Baroiant, S.; Barone, M.; Bauer, G.; Bedeschi, F.; Belforte, S.; Bell, W. H.; Bellettini, G.; Bellinger, J.; Benjamin, D.; Bensinger, J. R.; Beretvas, A.; Berge, J. P.; Berryhill, J. W.; Bhatti, A.; Binkley, M.; Bisello, D.; Bishai, M.; Blair, R. E.; Blocker, C.; Bloom, K.; Blumenfeld, B.; Blusk, S.; Bocci, A.; Bodek, A.; Bokhari, W.; Bolla, G.; Bonushkin, Y.; Bortoletto, D.; Boudreau, J.; Brandl, A.; Brink, S. van den; Bromberg, C.; Brozović, M.; Brubaker, E.; Bruner, N.; Buckley-Geer, E.; Budagov, J.; Budd, H. S.; Burkett, K.; Busetto, G.; Byon-Wagner, A.; Byrum, K. L.; Cabrera, S.; Calafiura, P.; Campbell, M.; Carithers, W.; Carlson, J.; Carlsmith, D.; Caskey, W.; Castro, A.; Cauz, D.; Cerri, A.; Chan, A. W.; Chang, P. S.; Chang, P. T.; Chapman, J.; Chen, C.; Chen, Y. C.; Cheng, M. T.; Chertok, M.; Chiarelli, G.; Чириков-Зорин, И.; Chlachidze, G.; Chlebana, F.; Christofek, L.; Chu, M. L.; Chung, Y. S.; Ciobanu, C. I.; Clark, A.; Connolly, A.; Conway, J.; Cordelli, M.; Cranshaw, J.; Cropp, R.; Culbertson, R.; Dagenhart, D.; D’Auria, S.; DeJongh, F.; Dell’Agnello, S.; Dell’Orso, M.; Demortier, L.; Deninno, M.; Derwent, P. F.; Devlin, T.; Dittmann, J.; Dominguez, A.; Donati, S.; Done, J.; D’Onofrio, M.; Dorigo, T.; Eddy, N.; Einsweiler, K.; Elias, J. E.; Engels, E.; Erbacher, R.; Errede, D.; Errede, S.; Fan, Q.; Feild, R. G.; Fernández, J. P.; Ferretti, C.; Field, R. D.; Fiori, I.; Flaugher, B.; Foster, G. W.; Franklin, M.; Freeman, J.; Friedman, J.; Fukui, Y.; Furic, I. K.; Galeotti, S.; Gallas, A.; Gallinaro, M.; Gao, T.; Garcia-Sciveres, M.; Garfinkel, A. F.; Gatti, P.; Gerdes, D. W.; Giannetti, P.; Glagolev, V.; Glenzinski, D.; Gold, M.; Goldstein, J.; Gorelov, I.; Goshaw, A. T.; Gotra, Y.; Goulianos, K.; Green, C.; Grim, G.; Gris, Ph.; Groer, L.; Grosso-Pilcher, C.; Guenther, M.; Guillian, G.; Costa, J. Guimarães da; Haas, R. M.; Haber, C.; Hahn, S. R.; Hall, C.; Handa, T.; Handler, R.; Hao, W.; Happacher, F.; Hara, K.; Hardman, A. D.; Harris, R. M.; Hartmann, F.; Hatakeyama, K.; Hauser, J.; Heinrich, J.; Heiß, A.; Herndon, M.; Hill, C.; Hoffman, K. D.; Holck, C.; Hollebeek, R.; Holloway, L.; Hughes, R.; Huston, J.; Huth, J.; Ikeda, H.; Incandela, J.; Introzzi, G.; Iwai, J.; Iwata, Y.; James, E.; Jones, M.; Joshi, U.; Kambara, H.; Kamon, T.; Kaneko, T.; Karr, K.; Kasha, H.; Kato, Y.; Keaffaber, T. A.; Kelley, K.; Kelly, M.; Kennedy, R. D.; Kephart, R.; Khazins, D.; Kikuchi, T.; Kilminster, B.; Kim, B. J.; Kim, D. H.; Kim, H. S.; Kim, M. J.; Kim, S. B.; Kim, S. H.; Kim, Y. K.; Kirby, M.; Kirk, M.; Kirsch, L.; Klimenko, S.; Koehn, P.; Kondo, K.; Königsberg, J.; Korn, A.; Korytov, A.; Kovacs, E.; Kroll, J.; Kruse, M.; Kuhlmann, S.; Kurino, K.; Kuwabara, T.; Laasanen, A. T.; Lai, N.; Lami, S.; Lammel, S.; Lancaster, J.; Lancaster, M.; Lander, R.; Lath, A.; Latino, G.; LeCompte, T.; Lee, A. M.; Lee, K.; Leone, S.; Lewis, J. D.; Lindgren, M.; Liss, T. M.; Liu, J. B.; Liu, Y. C.; Litvintsev, D.; Lobban, O.; Lockyer, N. S.; Loken, J.; Loreti, M.; Lucchesi, D.; Lukens, P.; Lusin, S.; Lyons, L.; Lys, J.; Madrak, R.; Maeshima, K.; Maksimović, P.; Malferrari, L.; Mangano, M.; Mariotti, M.; Martignon, G.; Martín, A.; Matthews, J.; Mayer, J.; Mazzanti, P.; McFarland, K. S.; McIntyre, P.; Mckigney, E. A.; Menguzzato, M.; Menzione, A.; Mesropian, C.; Meyer, A.; Miao, T.; Miller, R.; Miller, J. S.; Minato, H.; Miscetti, S.; Mishina, M.; Mitselmakher, G.; Moggi, N.; Moore, E. F.; Moore, R.; Morita, Y.; Moulik, T.; Mulhearn, M.; Mukherjee, A.; Müller, Th.; Munar, A.; Murat, P.; Murgia, S.; Nachtman, J.; Nagaslaev, V.; Nahn, S.; Nakada, H.; Nakano, I.; Nelson, Charles A.; Nelson, T. K.; Neu, C.; Neuberger, D.; Newman-Holmes, C.; Ngan, C. Y.P.; Huang, Niu; Nodulman, L.; Nomerotski, A.; Oh, S. H.; Oh, Y. D.; Ohmoto, T.; Ohsugi, T.; Oishi, R.; Okusawa, T.; Olsen, J.; Orejudos, W.; Pagliarone, C.; Palmonari, F.; Paoletti, R.; Papadimitriou, V.; Partos, D.; Patrick, J.; Pauletta, G.; Paulini, M.; Paus, C.; Pellett, D.; Pescara, L.; Phillips, T. J.; Piacentino, G.; Pitts, K.; Pompoš, A.; Pondrom, L.; Pope, G.; Popovic, M.; Prokoshin, F.; Proudfoot, J.; Ptohos, F.; Pukhov, O.; Punzi, G.; Rakitine, A.; Ratnikov, F.; Reher, D.; Reichold, A.; Ribon, A.; Riegler, W.; Rimondi, F.; Ristori, L.; Riveline, M.; Robertson, W. J.; Robinson, A.; Rodrigo, T.; Rolli, S.; Rosenson, L.; Roser, R.; Rossin, R.; Rott, C.; Roy, A.; Ruiz, A.; Safonov, A.; Denis, R. St.; Sakumoto, W. K.; Saltzberg, D.; Sánchez, C.; Sansoni, A.; Santi, L.; Sato, H.; Savard, P.; Schlabach, P.; Schmidt, E. E.; Schmidt, M. P.; Schmitt, M.; Scodellaro, L.; Scott, A.; Scribano, A.; Segler, S.; Seidel, S. C.; Seiya, Y.; Semenov, A.; Semeria, F.; Shah, T.; Shapiro, M.; Shepard, P. F.; Shibayama, T.; Shimojima, M.; Shochet, M.; Sidoti, A.; Siegrist, J.; Sill, A.; Sinervo, P.; Singh, P.; Slaughter, A. J.; Sliwa, K.; Smith, C.; Snider, F. D.; Solodsky, A.; Spalding, J.; Speer, T.; Sphicas, P.; Spinella, F.; Spiropulu, M.; Spiegel, L.; Steele, J.; Stefanini, A.; Strologas, J.; Strumia, F.; Stuart, D.; Sumorok, K.; Suzuki, T.; Takano, T.; Takashima, R.; Takikawa, K.; Tamburello, P.; Tanaka, M.; Tannenbaum, B.; Tecchio, M.; Tesarek, R. J.; Teng, P. K.; Terashi, K.; Tether, S.; Thompson, A. S.; Thurman‐Keup, R.; Tipton, P.; Tkaczyk, S.; Toback, D.; Tollefson, K.; Tollestrup, A.; Tonelli, D.; Toyoda, H.; Trischuk, W.; Trocóniz, Jorge F de; Tseng, J.; Turini, N.; Ukegawa, F.; Vaiciulis, T.; Valls, J.; Vejcik, S.; Velev, G.; Veramendi, G.; Vidal, R.; Vila, I.; Vilar, R.; Volobouev, I.; Mey, M. von der; Vucinic, D.; Wagner, R. G.; Wagner, R. L.; Wallace, N. B.; Zhang, Wan; Wang, C.; Wang, M. J.; Ward, B. F. L.; Waschke, S.; Watanabe, Takashi; Waters, D.; Watts, T.; Webb, R.; Wenzel, H.; Wester, W. C.; Wicklund, A. B.; Wicklund, E.; Wilkes, T.; Williams, H. H.; Wilson, P.; Winer, B. L.; Winn, D.; Wolbers, S.; Wolinski, D.; Wolinski, J.; Wolinski, S.; Worm, S. D.; Wu, X.; Wyss, J.; Yao, W-M.; Yeh, G. P.; Yeh, P.; Yoh, J.; Yosef, C.; Yoshida, T.; Yu, I.; Yu, S. S.; Z, Yu; Zanetti, A.; Zetti, F.; Zucchelli, S.

doi:10.1103/physrevd.65.092002

Cited by 182 publications

(122 citation statements)

References 21 publications

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120

Contrasting

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“…Since observables of the type we discuss here (energy or particle flows in limited regions of phase space) are often used in order to tune the parameters of the Monte Carlo algorithms (see e.g. [21] for examples and references), it is important to be at least aware of the fact the perturbative description yielded by the parton shower, may in these cases be significantly poorer than that obtained for instance for global observables. We have thus chosen one such observable and carried out a detailed study both of the role of angular ordering as well as the description provided by the most commonly used Monte Carlo event generators HERWIG and PYTHIA, compared to the full single-logarithmic result (in the large N c limit).…”

Section: Discussionmentioning

confidence: 99%

Angular ordering and parton showers for non-global QCD observables

Banfi¹,

Corcella²,

Dasgupta³

2007

J. High Energy Phys.

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We study the mismatch between a full calculation of non-global singlelogarithms in the large-N c limit and an approximation based on free azimuthal averaging, and the consequent angular-ordered pattern of soft gluon radiation in QCD. We compare the results obtained in either case to those obtained from the parton showers in the Monte Carlo event generators HERWIG and PYTHIA, with the aim of assessing the accuracy of the parton showers with regard to such observables where angular ordering is merely an approximation even at leading-logarithmic accuracy and which are commonly employed for the tuning of event generators to data.

show abstract

Section: Discussionmentioning

confidence: 99%

Angular ordering and parton showers for non-global QCD observables

Banfi¹,

Corcella²,

Dasgupta³

2007

J. High Energy Phys.

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“…Experimentally, one can identify the products of the hard scattering, usually the leading jet, and study the region azimuthally perpendicular to it as a function of the jet energy. Results of such an analysis have been published by the CDF [2][3][4][5] and STAR [6] collaborations for pp collisions at √ s = 1.8 and 0.2 TeV, respectively. Alternatively, the energy scale is given by the leading charged-particle transverse momentum, circumventing uncertainties related to the jet reconstruction procedure at low p T .…”

Section: Jhep07(2012)116mentioning

confidence: 99%

“…2 The UE activity in the plateau region is more 2 These data are for events that have at least one charged particle in |η| < 2.5.…”

Section: Jhep07(2012)116mentioning

confidence: 99%

“…In this paper, we present an analysis of the bulk particle production in pp collisions at the LHC by measuring the so-called Underlying Event (UE) activity [2]. The UE is defined as the sum of all the processes that build up the final hadronic state in a collision excluding the hardest leading order partonic interaction.…”

Section: Jhep07(2012)116mentioning

confidence: 99%

“…On the other hand the mean values of the Transverse plateaus from the two measurements are in good agreement, indicating an independence of the UE activity on the pseudorapidity range. The CDF collaboration measured the UE as a function of charged particle jet p T at a collision energy of 1.8 TeV [2]. The particle p T threshold is 0.5 GeV/c and the acceptance |η| < 1.…”

Section: Jhep07(2012)116mentioning

confidence: 99%

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Underlying Event measurements in pp collisions at $ \sqrt {s} = 0.9 $ and 7 TeV with the ALICE experiment at the LHC

Abelev¹,

Quintana²,

Adamová³

et al. 2012

J. High Energ. Phys.

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We present measurements of Underlying Event observables in pp collisions at √ s = 0.9 and 7 TeV. The analysis is performed as a function of the highest charged-particle transverse momentum p T,LT in the event. Different regions are defined with respect to the azimuthal direction of the leading (highest transverse momentum) track: Toward, Transverse and Away. The Toward and Away regions collect the fragmentation products of the hardest partonic interaction. The Transverse region is expected to be most sensitive to the Underlying Event activity. The study is performed with charged particles above three different p T thresholds: 0.15, 0.5 and 1.0 GeV/c. In the Transverse region we observe an increase in the multiplicity of a factor 2-3 between the lower and higher collision energies, depending on the track p T threshold considered. Data are compared to Pythia 6.4, Pythia 8.1 and Phojet. On average, all models considered underestimate the multiplicity and summed p T in the Transverse region by about 10-30%.

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Monte Carlo Generators and Fixed‐order Calculations: Predicting the (Un)Expected

Gieseke

Nagy²

2011

Physics at the Terascale

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Charged jet evolution and the underlying event in proton-antiproton collisions at 1.8 TeV

Cited by 182 publications

References 21 publications

Angular ordering and parton showers for non-global QCD observables

Angular ordering and parton showers for non-global QCD observables

Underlying Event measurements in pp collisions at $ \sqrt {s} = 0.9 $ and 7 TeV with the ALICE experiment at the LHC

Monte Carlo Generators and Fixed‐order Calculations: Predicting the (Un)Expected

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