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Rapidity-alignment and p(T) compensation of particle pairs in hadronic Z(0) decays

Abdallah, J; Abreu, P; Adam, W; Adzic, P; Albrecht, T; Alderweireld, T; Alemany-Fernandez, R; Allmendinger, T; Allport, PP and Almehed, Sverker LU , et al. (2002) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 533(3-4). p.243-252
Abstract
Observation is made of rapidity-alignment of K+K- and (p) over barp pairs which results from their asymmetric orientation in rapidity, with respect to the direction from primary quark to antiquark. The K+K- and (p) over barp data are consistent with predictions from the fragmentation string model. However, the (p) over barp data strongly disagree with the conventional implementation of the cluster model. The non-perturbative process of 'gluon splitting to diquarks' has to be incorporated into the cluster model for it to agree with the data. Local conservation of PT between particles nearby in rapidity (i.e., p(T) compensation) is analysed with respect to the thrust direction for pi(+)pi(-), K+K-, and (p) over barp pairs. In this case, the... (More)
Observation is made of rapidity-alignment of K+K- and (p) over barp pairs which results from their asymmetric orientation in rapidity, with respect to the direction from primary quark to antiquark. The K+K- and (p) over barp data are consistent with predictions from the fragmentation string model. However, the (p) over barp data strongly disagree with the conventional implementation of the cluster model. The non-perturbative process of 'gluon splitting to diquarks' has to be incorporated into the cluster model for it to agree with the data. Local conservation of PT between particles nearby in rapidity (i.e., p(T) compensation) is analysed with respect to the thrust direction for pi(+)pi(-), K+K-, and (p) over barp pairs. In this case, the string model provides fair agreement with the data. The cluster model is incompatible with the data for all three particle pairs. The model with its central premiss of isotropically-decaying clusters predicts a p(T) correlation not seen in the data. (C) 2002 Elsevier Science B.V. All rights reserved. (Less)
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Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
533
issue
3-4
pages
243 - 252
publisher
Elsevier
external identifiers
  • wos:000175730100006
  • scopus:0037046602
ISSN
0370-2693
DOI
10.1016/S0370-2693(02)01658-1
language
English
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yes
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@article{c4c5e7ba-436e-437d-92e6-2b1855f22c0d,
  abstract     = {Observation is made of rapidity-alignment of K+K- and (p) over barp pairs which results from their asymmetric orientation in rapidity, with respect to the direction from primary quark to antiquark. The K+K- and (p) over barp data are consistent with predictions from the fragmentation string model. However, the (p) over barp data strongly disagree with the conventional implementation of the cluster model. The non-perturbative process of 'gluon splitting to diquarks' has to be incorporated into the cluster model for it to agree with the data. Local conservation of PT between particles nearby in rapidity (i.e., p(T) compensation) is analysed with respect to the thrust direction for pi(+)pi(-), K+K-, and (p) over barp pairs. In this case, the string model provides fair agreement with the data. The cluster model is incompatible with the data for all three particle pairs. The model with its central premiss of isotropically-decaying clusters predicts a p(T) correlation not seen in the data. (C) 2002 Elsevier Science B.V. All rights reserved.},
  author       = {Abdallah, J and Abreu, P and Adam, W and Adzic, P and Albrecht, T and Alderweireld, T and Alemany-Fernandez, R and Allmendinger, T and Allport, PP and Almehed, Sverker and Amaldi, U and Amapane, N and Amato, S and Anashkin, E and Andreazza, A and Andringa, S and Anjos, N and Antilogus, P and Apel, WD and Arnoud, Y and Ask, Stefan and Asman, B and Augustin, JE and Augustinus, A and Baillon, P and Ballestrero, A and Bambade, P and Barbier, R and Bardin, D and Barker, G and Baroncelli, A and Battaglia, M and Baubillier, M and Becks, KH and Begalli, M and Behrmann, A and Bellunato, T and Benekos, N and Benvenuti, A and Berat, C and Berggren, M and Berntzon, L and Bertrand, D and Besancon, M and Besson, N and Bloch, D and Blom, M and Bonesini, M and Boonekamp, M and Booth, PSL and Borisov, G and Botner, O and Bouquet, B and Bowcock, TJV and Boyko, I and Bracko, M and Brenner, R and Brodet, E and Brodzicka, J and Bruckman, P and Brunet, JM and Bugge, L and Buschmann, P and Calvi, M and Camporesi, T and Canale, V and Carena, F and Carimalo, C and Castro, N and Cavallo, F and Chapkin, M and Charpentier, P and Checchia, P and Chierici, R and Chliapnikov, P and Chung, SU and Cieslik, K and Collins, P and Contri, R and Cosme, G and Cossutti, F and Costa, MJ and Crawley, B and Crennell, D and Cuevas, J and D'Hondt, J and Dalmau, J and da Silva, T and Da Silva, W and Della Ricca, G and De Angelis, A and De Boer, W and De Clercq, C and De Lotto, B and De Maria, N and De Min, A and de Paula, L and Di Ciaccio, L and Di Simone, A and Doroba, K and Drees, J and Dris, M and Eigen, G and Ekelof, T and Ellert, M and Elsing, M and Santo, MCE and Fanourakis, G and Fassouliotis, D and Feindt, M and Fernandez, J and Ferrer, A and Ferro, F and Flagmeyer, U and Foeth, H and Fokitis, E and Fulda-Quenzer, F and Fuster, J and Gandelman, M and Garcia, C and Gavillet, P and Gazis, E and Gele, D and Geralis, T and Gokieli, R and Golob, B and Gomez-Ceballos, G and Goncalves, P and 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  issn         = {0370-2693},
  language     = {eng},
  number       = {3-4},
  pages        = {243--252},
  publisher    = {Elsevier},
  series       = {Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics},
  title        = {Rapidity-alignment and p(T) compensation of particle pairs in hadronic Z(0) decays},
  url          = {http://dx.doi.org/10.1016/S0370-2693(02)01658-1},
  volume       = {533},
  year         = {2002},
}