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Tests for determining the parton ancestor of a hadron jet
Phys. Rev. D 39, 2550 – Published 1 May, 1989
DOI: https://doi.org/10.1103/PhysRevD.39.2550
Abstract
Using hadron jets simulated by Monte Carlo QCD cascades, we explore methods of data analysis aimed at determining the parton originating the jet. We discuss a method of binning data which helps differentiate quark jets from gluon jets. If, in addition, the experiment can separate K’s from π’s, a second set of bins can be used to help determine the flavor of the quark jets.
References (6)
- G. Marchesini and B. R. Webber, Nucl. Phys. B238, 1 (1984); B. R. Webber, B238, 492 (1984).
- G. Marchesini and B. R. Webber, Nucl. Phys. B310, 461 (1988).
- To ``find'' a jet, we proceed as follows: First, find the most energetic particle. Then find the most energetic particle within a 45degr cone of the first one. Add the four-momentum vectors to form a new axis, and repeat the process until no particles are added to the jet. Then the procedure is repeated to find the next jet, using the remaining particles, etc.
- The main determinant of the jet properties is the of the hard process creating the jets [in our case (85 GeV)]. Properties vary logarithmically in this variable.
- A. H. Mueller, Nucl. Phys. B241, 141 (1984); E. D. Malaza and B. R. Webber, Phys. Lett. 149B, 501 (1984). See also Fig. 11 in the Marchesini-Webber paper of Ref. 2.
- Walter Ledermann, Handbook of Applicable Mathematics, (Wiley, New York, 1981), Vol. III: Numerical Methods, p. 92.