Investigation of colour reconnection in WW events with the DELPHI detector at LEP-2
J. Abdallah
(1)
,
P. Abreu
,
W. Adam
,
P. Adzic
,
T. Albrecht
,
T. Alderweireld
,
R. Alemany-Fernandez
,
T. Allmendinger
,
P. P. Allport
,
U. Amaldi
,
N. Amapane
,
S. Amato
,
E. Anashkin
,
A. Andreazza
,
S. Andringa
,
N. Anjos
,
P. Antilogus
(1)
,
W. D. Apel
,
Y. Arnoud
(2)
,
S. Ask
,
B. Åsman
,
J.-E. Augustin
(1)
,
A. Augustinus
,
P. Baillon
,
A. Ballestrero
,
P. Bambade
(3)
,
R. Barbier
(4)
,
D. Bardin
,
G. J. Barker
,
A. Baroncelli
,
M. Battaglia
,
M. Baubillier
(1)
,
K. H. Becks
,
M. Begalli
,
A. Behrmann
,
E. Ben-Haim
(3)
,
N. Benekos
,
A. Benvenuti
,
C. Bérat
(2)
,
M. Berggren
(1)
,
L. Berntzon
,
D. Bertrand
,
M. Besançon
(5)
,
N. Besson
(5)
,
D. Bloch
(6)
,
M. Blom
,
M. Bluj
,
M. Bonesini
,
M. Boonekamp
(5)
,
P. S. L. Booth
,
G. Borisov
,
O. Botner
,
B. Bouquet
(3)
,
T. J. V. Bowcock
,
I. Boyko
,
M. Bracko
,
R. Brenner
,
E. Brodet
,
P. Brückman
,
J. M. Brunet
,
B. Buschbeck
,
P. Buschmann
,
M. Calvi
,
T. Camporesi
,
V. Canale
,
F. Carena
,
N. Castro
,
F. Cavallo
,
M. Chapkin
,
P. Charpentier
,
P. Checchia
,
R. Chierici
,
P. Shlyapnikov
,
J. Chudoba
,
S. U. Chung
,
K. Cieslik
,
P. Collins
,
R. Contri
,
G. Cosme
(3)
,
F. Cossutti
,
M. J. Costa
,
D. J. Crennell
,
J. Cuevas-Maestro
,
J. d'Hondt
,
J. Dalmau
,
T. da Silva
,
W. da Silva
(1)
,
G. Della Ricca
,
A. de Angelis
,
W. de Boer
,
C. de Clercq
,
B. de Lotto
,
N. de Maria
,
Min A. De
,
L. de Paula
,
L. Di Ciaccio
,
A. Di Simone
,
K. Doroba
,
J. Drees
,
G. Eigen
,
Tord Johan Carl Ekelöf
,
M. Ellert
,
M. Elsing
,
M. C. Espirito-Santo
,
G. K. Fanourakis
,
D. Fassouliotis
,
M. Feindt
,
J. Fernández
,
A. Ferrer
,
F. Ferro
,
U. Flagmeyer
,
H. Föth
,
E. Fokitis
,
F. Fulda-Quenzer
(3)
,
J. Fuster
,
M. Gandelman
,
C. García
,
P. Gavillet
,
E. Gazis
,
R. Gokieli
,
B. Golob
,
G. Gómez-Ceballos
,
Paulo Gonçalves
,
E. Graziani
,
G. Grosdidier
(3)
,
K. Grzelak
,
J. Guy
,
C. Haag
,
A. Hallgren
,
K. Hamacher
,
K. Hamilton
,
S. Haug
,
F. Hauler
,
V. Hedberg
,
M. Hennecke
,
H. Herr
,
Jakobus Hoffman
,
S. O. Holmgren
,
P. J. Holt
,
M. A. Houlden
,
K. Hultqvist
,
J. N. Jackson
,
G. Jarlskog
,
P. Jarry
(5)
,
D. Jeans
,
E. K. Johansson
,
P. D. Johansson
,
P. Jonsson
(4)
,
C. Joram
,
L. Jungermann
,
F. Kapusta
(1)
,
S. Katsanevas
(4)
,
E. Katsoufis
,
G. Kernel
,
B. P. Kersevan
,
U. Kerzel
,
B. T. King
,
N. J. Kjaer
,
P. Kluit
,
P. Kokkinias
,
C. Kourkoumelis
,
O. Kuznetsov
,
Z. Krumshtein
,
M. Kucharczyk
,
J. Lamsa
,
G. Leder
,
F. Ledroit
(2)
,
L. Leinonen
,
R. Leitner
,
J. Lemonne
,
V. Lepeltier
(3)
,
T. Lesiak
,
W. Liebig
,
D. Liko
,
A. Lipniacka
,
J. H. Lopes
,
J. M. López
,
D. Loukas
,
P. Lutz
(5)
,
L. Lyons
,
J. Macnaughton
,
A. Malek
,
S. Maltezos
,
F. Mandl
,
J. Marco
,
R. Marco
,
B. Maréchal
,
M. Margoni
,
J. C. Marin
,
C. Mariotti
,
A. Markou
,
C. Martínez-Rivero
,
J. Masik
,
N. Mastroyiannopoulos
,
F. Matorras
,
C. Matteuzzi
,
F. Mazzucato
,
M. Mazzucato
,
R. Mcnulty
,
C. Meroni
,
E. Migliore
,
W.A. Mitaroff
,
U. Mjörnmark
,
T. Moa
,
M. Moch
,
K. Mönig
,
R. Monge
,
J. Montenegro
,
D. Moraes
,
S. Moreno
,
P. Morettini
,
U. Müller
,
K. Münich
,
M. Mulders
,
L. Mundim
,
W. Murray
,
B. Muryn
,
G. Myatt
,
T. Myklebust
,
M. Nassiakou
,
F. Navarria
,
K. Nawrocki
,
R. Nicolaidou
(5)
,
M. Nikolenko
(6)
,
A. Oblakowska-Mucha
,
V. F. Obraztsov
,
A. Olshevski
,
A. Onofre
,
R. Orava
,
K. Österberg
,
A. Ouraou
(5)
,
A. Oyanguren
,
M. Paganoni
,
S. Paiano
,
J. P. Palacios
,
H. Palka
,
T. D. Papadopoulou
,
L. Pape
,
C. Parkes
,
F. Parodi
,
U. Parzefall
,
A. Passeri
,
O. Passon
,
L. Peralta
,
V. Perepelitsa
,
A. Perrotta
,
A. Petrolini
,
J. Piedra
,
L. Pieri
,
F. Pierre
(5)
,
M. Pimenta
,
E. Piotto
,
T. Podobnik
,
V. Poireau
,
M. E. Pol
,
G. Polok
,
V. Pozdnyakov
,
N. Pukhaeva
,
A. Pullia
,
J. Rames
,
A. Read
,
P. Rebecchi
,
J. Rehn
,
D. Reid
,
R. Reinhardt
,
P. B. Renton
,
F. Richard
(3)
,
J. Rídky
,
M. Rivero
,
D. Rodríguez
,
A. Romero
,
P. Ronchese
,
P. Roudeau
(3)
,
T. Rovelli
,
V. Ruhlmann-Kleider
(5)
,
D. Ryabtchikov
,
A. Sadowsky
,
L. Salmi
,
J. Salt
,
C. Sander
,
A. Savoy-Navarro
(1)
,
U. Schwickerath
,
R. Sekulin
,
M. Siebel
,
A. Sisakian
,
G. Smadja
(4)
,
O. Smirnova
,
A. Sokolov
,
A. Sopczak
,
R. Sosnowski
,
T. Spassoff
,
M. Stanitzki
,
A. Stocchi
(3)
,
J. Strauss
,
B. Stugu
,
M. Szczekowski
,
M. Szeptycka
,
T. Szumlak
,
T. Tabarelli
,
A. C. Taffard
,
F. Tegenfeldt
,
J. Timmermans
,
L. Tkatchev
,
M. Tobin
,
S. Todorovova
,
B. Tomé
,
A. Tonazzo
(7)
,
Pablo Tortosa
,
P. Travnicek
,
D. Treille
,
G. Tristram
(8)
,
M. Trochimczuk
,
C. Troncon
,
M.L. Turluer
(5)
,
I. A. Tyapkin
,
P. Tyapkin
,
S. Tzamarias
,
V. Uvarov
,
G. Valenti
,
P. van Dam
,
J. van Eldik
,
N. van Remortel
,
I. van Vulpen
,
G. Vegni
,
F. Veloso
,
W. Venus
,
P. Verdier
(4)
,
V. Verzi
,
D. Vilanova
(5)
,
L. Vitale
,
V. Vrba
,
H. Wahlen
,
C. Walck
,
A.J. Washbrook
,
C. Weiser
,
D. Wicke
,
J. Wickens
,
G. Wilkinson
,
M. Winter
(6)
,
M. Witek
,
O. Yushchenko
,
A. Zalewska
,
P. Zalewski
,
D. Zavrtanik
,
V. Zhuravlov
,
N.I. Zimin
,
A. Zintchenko
,
M. Zupan
1
LPNHE -
Laboratoire de Physique Nucléaire et de Hautes Énergies
2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3 LAL - Laboratoire de l'Accélérateur Linéaire
4 IPNL - Institut de Physique Nucléaire de Lyon
5 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
6 DRS-IPHC - Département Recherches Subatomiques
7 APC - Neutrinos
8 APC (UMR_7164) - AstroParticule et Cosmologie
2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3 LAL - Laboratoire de l'Accélérateur Linéaire
4 IPNL - Institut de Physique Nucléaire de Lyon
5 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
6 DRS-IPHC - Département Recherches Subatomiques
7 APC - Neutrinos
8 APC (UMR_7164) - AstroParticule et Cosmologie
P. Abreu
- Function : Author
W. Adam
- Function : Author
P. Adzic
- Function : Author
T. Albrecht
- Function : Author
T. Alderweireld
- Function : Author
R. Alemany-Fernandez
- Function : Author
T. Allmendinger
- Function : Author
P. P. Allport
- Function : Author
U. Amaldi
- Function : Author
N. Amapane
- Function : Author
S. Amato
- Function : Author
E. Anashkin
- Function : Author
A. Andreazza
- Function : Author
S. Andringa
- Function : Author
N. Anjos
- Function : Author
P. Antilogus
- Function : Author
- PersonId : 741722
- IdHAL : pierre-antilogus
- ORCID : 0000-0002-0389-5706
- IdRef : 116029315
W. D. Apel
- Function : Author
S. Ask
- Function : Author
B. Åsman
- Function : Author
A. Augustinus
- Function : Author
P. Baillon
- Function : Author
A. Ballestrero
- Function : Author
D. Bardin
- Function : Author
G. J. Barker
- Function : Author
A. Baroncelli
- Function : Author
M. Battaglia
- Function : Author
K. H. Becks
- Function : Author
M. Begalli
- Function : Author
A. Behrmann
- Function : Author
N. Benekos
- Function : Author
A. Benvenuti
- Function : Author
C. Bérat
- Function : Author
- PersonId : 739578
- IdHAL : corinne-berat
- ORCID : 0000-0001-8294-6294
- IdRef : 033505187
L. Berntzon
- Function : Author
D. Bertrand
- Function : Author
M. Blom
- Function : Author
M. Bluj
- Function : Author
M. Bonesini
- Function : Author
P. S. L. Booth
- Function : Author
G. Borisov
- Function : Author
- PersonId : 755154
- ORCID : 0000-0002-4516-459X
O. Botner
- Function : Author
T. J. V. Bowcock
- Function : Author
I. Boyko
- Function : Author
- PersonId : 755203
- ORCID : 0000-0003-2787-1845
M. Bracko
- Function : Author
R. Brenner
- Function : Author
E. Brodet
- Function : Author
P. Brückman
- Function : Author
J. M. Brunet
- Function : Author
B. Buschbeck
- Function : Author
P. Buschmann
- Function : Author
M. Calvi
- Function : Author
T. Camporesi
- Function : Author
V. Canale
- Function : Author
F. Carena
- Function : Author
N. Castro
- Function : Author
F. Cavallo
- Function : Author
M. Chapkin
- Function : Author
P. Charpentier
- Function : Author
P. Checchia
- Function : Author
R. Chierici
- Function : Author
P. Shlyapnikov
- Function : Author
J. Chudoba
- Function : Author
S. U. Chung
- Function : Author
K. Cieslik
- Function : Author
P. Collins
- Function : Author
R. Contri
- Function : Author
F. Cossutti
- Function : Author
M. J. Costa
- Function : Author
D. J. Crennell
- Function : Author
J. Cuevas-Maestro
- Function : Author
J. d'Hondt
- Function : Author
J. Dalmau
- Function : Author
T. da Silva
- Function : Author
G. Della Ricca
- Function : Author
A. de Angelis
- Function : Author
W. de Boer
- Function : Author
C. de Clercq
- Function : Author
B. de Lotto
- Function : Author
- PersonId : 755199
- ORCID : 0000-0003-3624-4480
N. de Maria
- Function : Author
Min A. De
- Function : Author
L. de Paula
- Function : Author
L. Di Ciaccio
- Function : Author
A. Di Simone
- Function : Author
K. Doroba
- Function : Author
J. Drees
- Function : Author
G. Eigen
- Function : Author
Tord Johan Carl Ekelöf
- Function : Author
M. Ellert
- Function : Author
M. Elsing
- Function : Author
M. C. Espirito-Santo
- Function : Author
G. K. Fanourakis
- Function : Author
D. Fassouliotis
- Function : Author
M. Feindt
- Function : Author
J. Fernández
- Function : Author
A. Ferrer
- Function : Author
F. Ferro
- Function : Author
U. Flagmeyer
- Function : Author
H. Föth
- Function : Author
E. Fokitis
- Function : Author
J. Fuster
- Function : Author
M. Gandelman
- Function : Author
C. García
- Function : Author
P. Gavillet
- Function : Author
E. Gazis
- Function : Author
R. Gokieli
- Function : Author
B. Golob
- Function : Author
G. Gómez-Ceballos
- Function : Author
Paulo Gonçalves
- Function : Author
- PersonId : 6491
- IdHAL : paulo-goncalves
- ORCID : 0000-0002-1781-6159
- IdRef : 061093645
E. Graziani
- Function : Author
K. Grzelak
- Function : Author
J. Guy
- Function : Author
C. Haag
- Function : Author
A. Hallgren
- Function : Author
K. Hamacher
- Function : Author
K. Hamilton
- Function : Author
S. Haug
- Function : Author
F. Hauler
- Function : Author
V. Hedberg
- Function : Author
M. Hennecke
- Function : Author
H. Herr
- Function : Author
Jakobus Hoffman
- Function : Author
S. O. Holmgren
- Function : Author
P. J. Holt
- Function : Author
M. A. Houlden
- Function : Author
K. Hultqvist
- Function : Author
J. N. Jackson
- Function : Author
G. Jarlskog
- Function : Author
D. Jeans
- Function : Author
E. K. Johansson
- Function : Author
P. D. Johansson
- Function : Author
C. Joram
- Function : Author
L. Jungermann
- Function : Author
E. Katsoufis
- Function : Author
G. Kernel
- Function : Author
B. P. Kersevan
- Function : Author
U. Kerzel
- Function : Author
B. T. King
- Function : Author
N. J. Kjaer
- Function : Author
P. Kluit
- Function : Author
P. Kokkinias
- Function : Author
C. Kourkoumelis
- Function : Author
O. Kuznetsov
- Function : Author
Z. Krumshtein
- Function : Author
M. Kucharczyk
- Function : Author
J. Lamsa
- Function : Author
G. Leder
- Function : Author
L. Leinonen
- Function : Author
R. Leitner
- Function : Author
J. Lemonne
- Function : Author
T. Lesiak
- Function : Author
W. Liebig
- Function : Author
D. Liko
- Function : Author
A. Lipniacka
- Function : Author
J. H. Lopes
- Function : Author
J. M. López
- Function : Author
D. Loukas
- Function : Author
L. Lyons
- Function : Author
J. Macnaughton
- Function : Author
A. Malek
- Function : Author
S. Maltezos
- Function : Author
F. Mandl
- Function : Author
J. Marco
- Function : Author
R. Marco
- Function : Author
B. Maréchal
- Function : Author
M. Margoni
- Function : Author
J. C. Marin
- Function : Author
C. Mariotti
- Function : Author
A. Markou
- Function : Author
- PersonId : 755200
- ORCID : 0000-0002-0812-6818
C. Martínez-Rivero
- Function : Author
J. Masik
- Function : Author
N. Mastroyiannopoulos
- Function : Author
F. Matorras
- Function : Author
C. Matteuzzi
- Function : Author
F. Mazzucato
- Function : Author
M. Mazzucato
- Function : Author
R. Mcnulty
- Function : Author
C. Meroni
- Function : Author
E. Migliore
- Function : Author
W.A. Mitaroff
- Function : Author
U. Mjörnmark
- Function : Author
T. Moa
- Function : Author
M. Moch
- Function : Author
K. Mönig
- Function : Author
R. Monge
- Function : Author
J. Montenegro
- Function : Author
D. Moraes
- Function : Author
S. Moreno
- Function : Author
P. Morettini
- Function : Author
U. Müller
- Function : Author
K. Münich
- Function : Author
M. Mulders
- Function : Author
L. Mundim
- Function : Author
W. Murray
- Function : Author
B. Muryn
- Function : Author
G. Myatt
- Function : Author
T. Myklebust
- Function : Author
M. Nassiakou
- Function : Author
F. Navarria
- Function : Author
K. Nawrocki
- Function : Author
A. Oblakowska-Mucha
- Function : Author
V. F. Obraztsov
- Function : Author
A. Olshevski
- Function : Author
A. Onofre
- Function : Author
R. Orava
- Function : Author
K. Österberg
- Function : Author
A. Oyanguren
- Function : Author
M. Paganoni
- Function : Author
S. Paiano
- Function : Author
- PersonId : 755201
- ORCID : 0000-0002-2239-3373
J. P. Palacios
- Function : Author
H. Palka
- Function : Author
T. D. Papadopoulou
- Function : Author
L. Pape
- Function : Author
C. Parkes
- Function : Author
F. Parodi
- Function : Author
U. Parzefall
- Function : Author
A. Passeri
- Function : Author
O. Passon
- Function : Author
L. Peralta
- Function : Author
V. Perepelitsa
- Function : Author
A. Perrotta
- Function : Author
A. Petrolini
- Function : Author
J. Piedra
- Function : Author
L. Pieri
- Function : Author
F. Pierre
- Function : Author
- PersonId : 739575
- IdHAL : frederic-pierre
- ORCID : 0000-0003-1243-6808
- IdRef : 068904975
M. Pimenta
- Function : Author
E. Piotto
- Function : Author
T. Podobnik
- Function : Author
V. Poireau
- Function : Author
M. E. Pol
- Function : Author
G. Polok
- Function : Author
V. Pozdnyakov
- Function : Author
N. Pukhaeva
- Function : Author
A. Pullia
- Function : Author
J. Rames
- Function : Author
A. Read
- Function : Author
P. Rebecchi
- Function : Author
J. Rehn
- Function : Author
D. Reid
- Function : Author
R. Reinhardt
- Function : Author
P. B. Renton
- Function : Author
J. Rídky
- Function : Author
M. Rivero
- Function : Author
D. Rodríguez
- Function : Author
A. Romero
- Function : Author
P. Ronchese
- Function : Author
T. Rovelli
- Function : Author
D. Ryabtchikov
- Function : Author
A. Sadowsky
- Function : Author
L. Salmi
- Function : Author
J. Salt
- Function : Author
C. Sander
- Function : Author
U. Schwickerath
- Function : Author
R. Sekulin
- Function : Author
M. Siebel
- Function : Author
A. Sisakian
- Function : Author
O. Smirnova
- Function : Author
A. Sokolov
- Function : Author
A. Sopczak
- Function : Author
R. Sosnowski
- Function : Author
T. Spassoff
- Function : Author
M. Stanitzki
- Function : Author
J. Strauss
- Function : Author
B. Stugu
- Function : Author
M. Szczekowski
- Function : Author
M. Szeptycka
- Function : Author
T. Szumlak
- Function : Author
T. Tabarelli
- Function : Author
A. C. Taffard
- Function : Author
F. Tegenfeldt
- Function : Author
J. Timmermans
- Function : Author
L. Tkatchev
- Function : Author
M. Tobin
- Function : Author
S. Todorovova
- Function : Author
B. Tomé
- Function : Author
Pablo Tortosa
- Function : Author
- PersonId : 5235
- IdHAL : pablo-tortosa
- ORCID : 0000-0002-7928-7264
- IdRef : 186126034
P. Travnicek
- Function : Author
D. Treille
- Function : Author
M. Trochimczuk
- Function : Author
C. Troncon
- Function : Author
I. A. Tyapkin
- Function : Author
P. Tyapkin
- Function : Author
S. Tzamarias
- Function : Author
V. Uvarov
- Function : Author
G. Valenti
- Function : Author
P. van Dam
- Function : Author
J. van Eldik
- Function : Author
N. van Remortel
- Function : Author
I. van Vulpen
- Function : Author
G. Vegni
- Function : Author
F. Veloso
- Function : Author
W. Venus
- Function : Author
V. Verzi
- Function : Author
L. Vitale
- Function : Author
V. Vrba
- Function : Author
H. Wahlen
- Function : Author
C. Walck
- Function : Author
A.J. Washbrook
- Function : Author
C. Weiser
- Function : Author
D. Wicke
- Function : Author
J. Wickens
- Function : Author
G. Wilkinson
- Function : Author
M. Witek
- Function : Author
O. Yushchenko
- Function : Author
A. Zalewska
- Function : Author
P. Zalewski
- Function : Author
D. Zavrtanik
- Function : Author
V. Zhuravlov
- Function : Author
N.I. Zimin
- Function : Author
A. Zintchenko
- Function : Author
M. Zupan
- Function : Author
Abstract
In the reaction e+e- -> WW -> (q_1 qbar_2)(q_3 qbar_4) the usual hadronization models treat the colour singlets q_1 qbar_2 and q_3 qbar_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 kappa parameter most compatible with the data was found to be: kappa_{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.