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Título: | Investigation of colour reconnection in WW events with the DELPHI detector at LEP-2 |
Autor: | Abdallah, J.; Martínez-Rivero, Celso CSIC ORCID ; Rivero, M.; Costa, María José CSIC ORCID; Matorras, Francisco CSIC ORCID ; Cuevas, Javier CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Marco, Jesús CSIC ORCID ; Tortosa, Pablo CSIC; Ferrer, Antonio CSIC ORCID; Salt, José CSIC ORCID; Marco, Rafael CSIC; García García, Carmen CSIC ORCID; Gómez-Ceballos, Guillelmo; Rodríguez, David; Fuster, Juan CSIC ORCID; Marín, J. C.; López, Juan M. CSIC ORCID ; Fernández Menéndez, Javier CSIC ORCID; Piedra, Jonatan CSIC ORCID | Palabras clave: | Colour reconnection (CR) Bose-Einstein Correlations Hadronic Z(0) Decays e(+)e(-) Collisions w+w- events Pair Production Identified Particles e+e- Annihilation Charged Pions Final-states |
Fecha de publicación: | 5-may-2007 | Editor: | Springer Nature Società Italiana di Fisica |
Citación: | European Physical Journal C 51(2): 249-269 (2007) | Resumen: | In the reaction e(+)e(-) --> WW --> (q(1)(q)over-bar(2))(q(3)(q)over-bar(4)) the usual hadronization models treat the colour singlets q(1)(q)over-bar(2) and q(3)(q)over-bar(4) coming from two W bosons independently. However, since the final state partons may coexist in space and time, cross-talk between the two evolving hadronic systems may be possible during fragmentation through soft gluon exchange. This effect is known as colour reconnection. In this article the results of the investigation of colour reconnection effects in fully hadronic decays of W pairs in DELPHI at LEP are presented. Two complementary analyses were performed, studying the particle flow between jets and W mass estimators, with negligible correlation between them, and the results were combined and compared to models. In the framework of the SK-I model, the value for its κ parameter most compatible with the data was found to be: κ_{SK-I} = 2.2^{+2.5}_{-1.3} corresponding to the probability of reconnection P_{reco} to be in the range 0.31 < P_{reco} < 0.68 at 68% confidence level with its best value at 0.52. | Descripción: | 21 páginas, 18 figuras, 6 tablas.-- El Pdf del artículo es la versión pre-print: arXiv:0704.0597v1.-- DELPHI Collaboration: et al. | Versión del editor: | http://dx.doi.org/10.1140/epjc/s10052-007-0304-9 | URI: | http://hdl.handle.net/10261/8524 | DOI: | 10.1140/epjc/s10052-007-0304-9 | ISSN: | 1434-6044 | E-ISSN: | 1434-6052 |
Aparece en las colecciones: | (IFCA) Artículos (IFIC) Artículos |
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0704.0597v1.pdf | 458,53 kB | Adobe PDF | Visualizar/Abrir |
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