GenEvA (I): a new framework for event generation

被引：21

作者：

Bauer, Christian W. ^{[1
]}

Tackmann, Frank J. ^{[1
]}

Thaler, Jesse ^{[1
]}

机构：

[1] Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2008年 / 12期

关键词：

Jets; Phenomenological Models; NLO Computations; QCD;

D O I：

10.1088/1126-6708/2008/12/010

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We show how many contemporary issues in event generation can be recast in terms of partonic calculations with a matching scale. This framework is called GenEvA, and a key ingredient is a new notion of phase space which avoids the problem of phase space double-counting by construction and includes a built-in definition of a matching scale. This matching scale can be used to smoothly merge any partonic calculation with a parton shower. The best partonic calculation for a given region of phase space can be determined through physics considerations alone, independent of the algorithmic details of the merging. As an explicit example, we construct a positive-weight partonic calculation for e(vertical bar) e(-) -> n jets at next-to-leading order (NLO) with leading-logarithmic (LL) resummation. We improve on the NLO/LL result by adding additional higher-multiplicity tree-level (LO) calculations to obtain a merged NLO/LO/LL result. These results are implemented using a new phase space generator introduced in a companion paper [1].

引用

页数：64

共 89 条

[21] CMS physics technical design report, volume II:: Physics performance [J].

Bayatian, G. L. ;

Chatrchyan, S. ;

Hmayakyan, G. ;

Sirunyan, A. M. ;

Adam, W. ;

Bergauer, T. ;

Dragicevic, M. ;

Eroe, J. ;

Friedl, M. ;

Fruehwirth, R. ;

Ghete, V. ;

Glaser, P. ;

Hrubec, J. ;

Jeitler, M. ;

Krammer, M. ;

Magrans, I. ;

Mikulec, I. ;

Mitaroff, W. ;

Noebauer, T. ;

Pernicka, M. ;

Porth, P. ;

Rohringer, H. ;

Strauss, J. ;

Taurok, A. ;

Waltenberger, W. ;

Walzel, G. ;

Widl, E. ;

Wulz, C-E ;

Fedorov, A. ;

Korzhik, M. ;

Missevitch, O. ;

Zuyeuski, R. ;

Chekhovsky, V. ;

Dvornikov, O. ;

Emeliantchik, I. ;

Litomin, A. ;

Mossolov, V. ;

Shumeiko, N. ;

Solin, A. ;

Stefanovitch, R. ;

Gonzalez, J. Suarez ;

Tikhonov, A. ;

Petrov, V. ;

D'Hondt, J. ;

De Weirdt, S. ;

Goorens, R. ;

Heyninck, J. ;

Lowette, S. ;

Tavernier, S. ;

Van Doninck, W. .

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2007, 34 (06) :995-1579

[22]

BERGMANN LJ, UMI8915738

[23] On-shell methods in perturbative QCD [J].

Bern, Zvi ;

Dixon, Lance J. ;

Kosower, David A. .

ANNALS OF PHYSICS, 2007, 322 (07) :1587-1634

[24] New jet cluster algorithms: next-to-leading order QCD and hadronization corrections (vol 370, pg 310, 1992) [J].

Bethke, S ;

Kunszt, Z ;

Soper, DE ;

Stirling, WJ .

NUCLEAR PHYSICS B, 1998, 523 (03) :681-681

[25] NEW JET CLUSTER ALGORITHMS - NEXT-TO-LEADING ORDER QCD AND HADRONIZATION CORRECTIONS [J].

BETHKE, S ;

KUNSZT, Z ;

SOPER, DE ;

STIRLING, WJ .

NUCLEAR PHYSICS B, 1992, 370 (02) :310-334

[26] CompHEP 4.4 - automatic computations from Lagrangians to events [J].

Boos, E ;

Bunichev, V ;

Dubinin, M ;

Dudko, L ;

Edneral, V ;

Ilyin, V ;

Kryukov, A ;

Savrin, V ;

Semenov, A ;

Sherstnev, A .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2004, 534 (1-2) :250-259

[27]

BRUBAKER E, HEPEX0603039

[28]

Cacciari M., HEPPH0607071

[29]

CAFARELLA A, ARXIV07102427

[30] NEW CLUSTERING-ALGORITHM FOR MULTIJET CROSS-SECTIONS IN E+E- ANNIHILATION [J].

CATANI, S ;

DOKSHITZER, YL ;

OLSSON, M ;

TURNOCK, G ;

WEBBER, BR .

PHYSICS LETTERS B, 1991, 269 (3-4) :432-438

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