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].
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页数：64
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共 89 条
  • [21] CMS physics technical design report, volume II:: Physics performance
    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.
    [J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2007, 34 (06) : 995 - 1579
  • [22] BERGMANN LJ, UMI8915738
  • [23] On-shell methods in perturbative QCD
    Bern, Zvi
    Dixon, Lance J.
    Kosower, David A.
    [J]. 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)
    Bethke, S
    Kunszt, Z
    Soper, DE
    Stirling, WJ
    [J]. NUCLEAR PHYSICS B, 1998, 523 (03) : 681 - 681
  • [25] NEW JET CLUSTER ALGORITHMS - NEXT-TO-LEADING ORDER QCD AND HADRONIZATION CORRECTIONS
    BETHKE, S
    KUNSZT, Z
    SOPER, DE
    STIRLING, WJ
    [J]. NUCLEAR PHYSICS B, 1992, 370 (02) : 310 - 334
  • [26] CompHEP 4.4 - automatic computations from Lagrangians to events
    Boos, E
    Bunichev, V
    Dubinin, M
    Dudko, L
    Edneral, V
    Ilyin, V
    Kryukov, A
    Savrin, V
    Semenov, A
    Sherstnev, A
    [J]. 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
    CATANI, S
    DOKSHITZER, YL
    OLSSON, M
    TURNOCK, G
    WEBBER, BR
    [J]. PHYSICS LETTERS B, 1991, 269 (3-4) : 432 - 438
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