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Manuscript Title: WEXTER and ERAFITTER: two programs to fit MW at LEP2 using the best
measurable kinematical variables. | ||

Authors: F.A. Berends, C.G. Papadopoulos, R. Pittau | ||

Program title: WEXTER and ERAFITTER | ||

Catalogue identifier: ADJJ_v1_0Distribution format: tar.gz | ||

Journal reference: Comput. Phys. Commun. 115(1998)32 | ||

Programming language: Fortran. | ||

Computer: SUN workstation. | ||

Operating system: UNIX. | ||

Keywords: Particle physics, Elementary, Event reconstruction, Fit to mw at lep2, Direct reconstruction, Method, Best measurable, Kinematical variables, Maximum likelihood fit. | ||

Classification: 11.9. | ||

Nature of problem:The extraction of MW from the LEP2 data. | ||

Solution method:The direct fit method is used, in which the theoretical probabilities of observing the final-state kinematical configurations are computed by integrating over the quantities that are not well measured. Therefore, an event-by-event kinematical reconstruction is avoided. MW is then determined through a maximum likelihood fit. | ||

Restrictions:The jets are treated at the partonic level. | ||

Running time:WEXTER: about 90 seconds on a SUN workstation to fit 10 semileptonic data points (case 2 in the text) using 7 values of MW and 2000 Monte Carlo points per event per mass, ISR included. ERAFITTER: for the same case as before, about 28 seconds on HP/712 to fit 10 data points, using 9 values of MW and 100 Monte Carlo points per event per mass. | ||

References: | ||

[1] | F.A. Berends, C.G. Papadopoulos and R. Pittau, Phys. Lett. B417 (1998) 385. |

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