Development and validation of HERWIG 7 tunes from CMS underlying-event measurements

This paper presents new sets of parameters (“tunes”) for the underlying-event model of the H E R W I G 7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in H E R W I G 7 , and are obtained from a fit to minimum-bias data collect...

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Veröffentlicht in:	Eur.Phys.J.C 2021-04, Vol.81 (4), p.312-312
Hauptverfasser:	Krammer, N., Pitters, F. M., Postiau, N., Roskas, C., Misheva, M., Ahmad, M., Liao, H., Zhang, S., Ban, Y., Razis, P. A., Dewanjee, R. K., Eerola, P., Kim, M. S., Tuominiemi, J., Besancon, M., Couderc, F., Denegri, D., Buchot Perraguin, A., Hakimi, A., Fontaine, J.-C., Carle, A., Fackeldey, P., Meyer, A., Mondal, S., Kasem, A., Mussgiller, A., Tholen, H., Benecke, A., De Leo, K., Stadie, H., Heidecker, C., Katkov, I., Karasavvas, D., Mandal, K., Meena, M., Sharan, M., Pugliese, G., Marcellini, S., Seidita, R., Malvezzi, S., Paganoni, M., Castaldi, R., Verdini, P. G., Mariotti, C., Lee, H., Kazana, M., Zhokin, A., Cirkovic, P., Brochero Cifuentes, J. A., Soares, M. S., Alvarez Gonzalez, B., Kailasapathy, B., Sonnadara, D. U. J., Bendavid, J., Hegeman, J., Kieseler, J., Meschi, E., Orsini, L., Pantaleo, F., Pfeiffer, A., Tavolaro, V. R., Ristic, B., Asavapibhop, B., Kaya, M., Manolopoulos, K., Bainbridge, R., Malik, S., Winterbottom, D., Hobson, P. R., Sawant, S., Dominguez, A., Buccilli, A., Henderson, C., Rumerio, P., West, C., Benelli, G., Yu, D., Derdzinski, M., Newman, H. B., Tao, Z., Banerjee, S., Gutsche, O., Klima, B., Ravera, F., Guerrero, D., Alhusseini, M., Swartz, M., Modak, A., Wang, L., Mcginn, C., Iashvili, I., Pekkanen, J., Jung, A. W., Wang, F., Heindl, M., Laflotte, I., Thomas, S., Spanier, S., Kim, H., Kunori, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Astronomy Astrophysics and Cosmology Bias Collisions (Nuclear physics) Distribution (Probability theory) Distribution functions Elementary Particles Hadrons Heavy Ions High Energy Physics - Experiment Measurement Science and Instrumentation Nuclear Energy Nuclear Physics Parameters Particle collisions Partons Physics Physics and Astronomy PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Protons Quantum Field Theories Quantum Field Theory Quarks Regular - Experimental Physics Regular Article - Experimental Physics String Theory
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Zusammenfassung:	This paper presents new sets of parameters (“tunes”) for the underlying-event model of the H E R W I G 7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in H E R W I G 7 , and are obtained from a fit to minimum-bias data collected by the CMS experiment at s = 0.9 , 7, and 13 Te . The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the data.
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-021-08949-5