Double-tag events in two-photon collisions at LEP

P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, H. Anderhub, V. P. Andreev, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, A. Bajo, G. Baksay, L. Baksay, S. V. Baldew, S. Banerjee & 80 others Sw Banerjee, A. Barczyk, R. Barillère, P. Bartalini, M. Basile, N. Batalova, R. Battiston, A. Bay, F. Becattini, U. Becker, F. Behner, L. Bellucci, R. Berbeco, J. Berdugo, P. Berges, B. Bertucci, B. L. Betev, M. Biasini, M. Biglietti, A. Biland, J. J. Blaising, S. C. Blyth, G. J. Bobbink, A. Böhm, L. Boldizsár, B. Borgia, S. Bottai, D. Bourilkov, M. Bourquin, S. Braccini, J. G. Branson, F. Brochu, A. Buijs, J. D. Burger, W. J. Burger, X. D. Cai, M. Capell, G. Cara Romeo, G. Carlino, A. Cartacci, J. Casaus, F. Cavallari, N. Cavallo, C. Cecchi, M. Cerrada, M. Chamizo, Y. H. Chang, M. Chemarin, A. Chen, G. Chen, G. M. Chen, H. F. Chen, H. S. Chen, G. Chiefari, L. Cifarelli, F. Cindolo, I. Clare, R. Clare, G. Coignet, N. Colino, S. Costantini, B. De la Cruz, S. Cucciarelli, J. A. Van Dalen, R. De Asmundis, P. Déglon, J. Debreczeni, A. Degré, K. Deiters, D. Della Volpe, E. Delmeire, P. Denes, F. DeNotaristefani, A. De Salvo, M. Diemoz, M. Dierckxsens, D. Van Dierendonck, C. Dionisi, M. Dittmar, et.al

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Double-tag events in two-photon collisions are studied using the L3 detector at LEP centre-of-mass energies from √s = 189 GeV to 209 GeV. The cross sections of the e+e- → e+e-hadrons and y*y* → hadrons processes are measured as a function of the product of the photon virtualities, Q2 = √Q1 2Q2 2, of the two-photon mass, Wyy, and of the variable Y = 1n(Wyy 2/Q2). The average photon virtuality is (Q1 2) = (Q2 2) = 16 GeV2. The results are in agreement with next-to-leading order calculations for the process y*y* → qq̄ in the interval 2 ≤ Y ≤ 5. An excess is observed in the interval 5 <Y ≤ 7, corresponding to Wyy greater than 40 GeV. This may be interpreted as a contribution of resolved photon QCD processes or the onset of BFKL phenomena.

Original languageEnglish
Pages (from-to)39-51
Number of pages13
JournalPhysics Letters B
Volume531
Issue number1-2
DOIs
Publication statusPublished - Apr 4 2002

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collisions
photons
hadrons
intervals
center of mass
quantum chromodynamics
detectors
cross sections
products
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., ... et.al (2002). Double-tag events in two-photon collisions at LEP. Physics Letters B, 531(1-2), 39-51. https://doi.org/10.1016/S0370-2693(02)01340-0

Double-tag events in two-photon collisions at LEP. / Achard, P.; Adriani, O.; Aguilar-Benitez, M.; Alcaraz, J.; Alemanni, G.; Allaby, J.; Aloisio, A.; Alviggi, M. G.; Anderhub, H.; Andreev, V. P.; Anselmo, F.; Arefiev, A.; Azemoon, T.; Aziz, T.; Bagnaia, P.; Bajo, A.; Baksay, G.; Baksay, L.; Baldew, S. V.; Banerjee, S.; Banerjee, Sw; Barczyk, A.; Barillère, R.; Bartalini, P.; Basile, M.; Batalova, N.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Bellucci, L.; Berbeco, R.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B. L.; Biasini, M.; Biglietti, M.; Biland, A.; Blaising, J. J.; Blyth, S. C.; Bobbink, G. J.; Böhm, A.; Boldizsár, L.; Borgia, B.; Bottai, S.; Bourilkov, D.; Bourquin, M.; Braccini, S.; Branson, J. G.; Brochu, F.; Buijs, A.; Burger, J. D.; Burger, W. J.; Cai, X. D.; Capell, M.; Cara Romeo, G.; Carlino, G.; Cartacci, A.; Casaus, J.; Cavallari, F.; Cavallo, N.; Cecchi, C.; Cerrada, M.; Chamizo, M.; Chang, Y. H.; Chemarin, M.; Chen, A.; Chen, G.; Chen, G. M.; Chen, H. F.; Chen, H. S.; Chiefari, G.; Cifarelli, L.; Cindolo, F.; Clare, I.; Clare, R.; Coignet, G.; Colino, N.; Costantini, S.; De la Cruz, B.; Cucciarelli, S.; Van Dalen, J. A.; De Asmundis, R.; Déglon, P.; Debreczeni, J.; Degré, A.; Deiters, K.; Della Volpe, D.; Delmeire, E.; Denes, P.; DeNotaristefani, F.; De Salvo, A.; Diemoz, M.; Dierckxsens, M.; Van Dierendonck, D.; Dionisi, C.; Dittmar, M.; et.al.

In: Physics Letters B, Vol. 531, No. 1-2, 04.04.2002, p. 39-51.

Research output: Contribution to journalArticle

Achard, P, Adriani, O, Aguilar-Benitez, M, Alcaraz, J, Alemanni, G, Allaby, J, Aloisio, A, Alviggi, MG, Anderhub, H, Andreev, VP, Anselmo, F, Arefiev, A, Azemoon, T, Aziz, T, Bagnaia, P, Bajo, A, Baksay, G, Baksay, L, Baldew, SV, Banerjee, S, Banerjee, S, Barczyk, A, Barillère, R, Bartalini, P, Basile, M, Batalova, N, Battiston, R, Bay, A, Becattini, F, Becker, U, Behner, F, Bellucci, L, Berbeco, R, Berdugo, J, Berges, P, Bertucci, B, Betev, BL, Biasini, M, Biglietti, M, Biland, A, Blaising, JJ, Blyth, SC, Bobbink, GJ, Böhm, A, Boldizsár, L, Borgia, B, Bottai, S, Bourilkov, D, Bourquin, M, Braccini, S, Branson, JG, Brochu, F, Buijs, A, Burger, JD, Burger, WJ, Cai, XD, Capell, M, Cara Romeo, G, Carlino, G, Cartacci, A, Casaus, J, Cavallari, F, Cavallo, N, Cecchi, C, Cerrada, M, Chamizo, M, Chang, YH, Chemarin, M, Chen, A, Chen, G, Chen, GM, Chen, HF, Chen, HS, Chiefari, G, Cifarelli, L, Cindolo, F, Clare, I, Clare, R, Coignet, G, Colino, N, Costantini, S, De la Cruz, B, Cucciarelli, S, Van Dalen, JA, De Asmundis, R, Déglon, P, Debreczeni, J, Degré, A, Deiters, K, Della Volpe, D, Delmeire, E, Denes, P, DeNotaristefani, F, De Salvo, A, Diemoz, M, Dierckxsens, M, Van Dierendonck, D, Dionisi, C, Dittmar, M & et.al 2002, 'Double-tag events in two-photon collisions at LEP', Physics Letters B, vol. 531, no. 1-2, pp. 39-51. https://doi.org/10.1016/S0370-2693(02)01340-0
Achard P, Adriani O, Aguilar-Benitez M, Alcaraz J, Alemanni G, Allaby J et al. Double-tag events in two-photon collisions at LEP. Physics Letters B. 2002 Apr 4;531(1-2):39-51. https://doi.org/10.1016/S0370-2693(02)01340-0
Achard, P. ; Adriani, O. ; Aguilar-Benitez, M. ; Alcaraz, J. ; Alemanni, G. ; Allaby, J. ; Aloisio, A. ; Alviggi, M. G. ; Anderhub, H. ; Andreev, V. P. ; Anselmo, F. ; Arefiev, A. ; Azemoon, T. ; Aziz, T. ; Bagnaia, P. ; Bajo, A. ; Baksay, G. ; Baksay, L. ; Baldew, S. V. ; Banerjee, S. ; Banerjee, Sw ; Barczyk, A. ; Barillère, R. ; Bartalini, P. ; Basile, M. ; Batalova, N. ; Battiston, R. ; Bay, A. ; Becattini, F. ; Becker, U. ; Behner, F. ; Bellucci, L. ; Berbeco, R. ; Berdugo, J. ; Berges, P. ; Bertucci, B. ; Betev, B. L. ; Biasini, M. ; Biglietti, M. ; Biland, A. ; Blaising, J. J. ; Blyth, S. C. ; Bobbink, G. J. ; Böhm, A. ; Boldizsár, L. ; Borgia, B. ; Bottai, S. ; Bourilkov, D. ; Bourquin, M. ; Braccini, S. ; Branson, J. G. ; Brochu, F. ; Buijs, A. ; Burger, J. D. ; Burger, W. J. ; Cai, X. D. ; Capell, M. ; Cara Romeo, G. ; Carlino, G. ; Cartacci, A. ; Casaus, J. ; Cavallari, F. ; Cavallo, N. ; Cecchi, C. ; Cerrada, M. ; Chamizo, M. ; Chang, Y. H. ; Chemarin, M. ; Chen, A. ; Chen, G. ; Chen, G. M. ; Chen, H. F. ; Chen, H. S. ; Chiefari, G. ; Cifarelli, L. ; Cindolo, F. ; Clare, I. ; Clare, R. ; Coignet, G. ; Colino, N. ; Costantini, S. ; De la Cruz, B. ; Cucciarelli, S. ; Van Dalen, J. A. ; De Asmundis, R. ; Déglon, P. ; Debreczeni, J. ; Degré, A. ; Deiters, K. ; Della Volpe, D. ; Delmeire, E. ; Denes, P. ; DeNotaristefani, F. ; De Salvo, A. ; Diemoz, M. ; Dierckxsens, M. ; Van Dierendonck, D. ; Dionisi, C. ; Dittmar, M. ; et.al. / Double-tag events in two-photon collisions at LEP. In: Physics Letters B. 2002 ; Vol. 531, No. 1-2. pp. 39-51.
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abstract = "Double-tag events in two-photon collisions are studied using the L3 detector at LEP centre-of-mass energies from √s = 189 GeV to 209 GeV. The cross sections of the e+e- → e+e-hadrons and y*y* → hadrons processes are measured as a function of the product of the photon virtualities, Q2 = √Q1 2Q2 2, of the two-photon mass, Wyy, and of the variable Y = 1n(Wyy 2/Q2). The average photon virtuality is (Q1 2) = (Q2 2) = 16 GeV2. The results are in agreement with next-to-leading order calculations for the process y*y* → qq̄ in the interval 2 ≤ Y ≤ 5. An excess is observed in the interval 5 <Y ≤ 7, corresponding to Wyy greater than 40 GeV. This may be interpreted as a contribution of resolved photon QCD processes or the onset of BFKL phenomena.",
author = "P. Achard and O. Adriani and M. Aguilar-Benitez and J. Alcaraz and G. Alemanni and J. Allaby and A. Aloisio and Alviggi, {M. G.} and H. Anderhub and Andreev, {V. P.} and F. Anselmo and A. Arefiev and T. Azemoon and T. Aziz and P. Bagnaia and A. Bajo and G. Baksay and L. Baksay and Baldew, {S. V.} and S. Banerjee and Sw Banerjee and A. Barczyk and R. Barill{\`e}re and P. Bartalini and M. Basile and N. Batalova and R. Battiston and A. Bay and F. Becattini and U. Becker and F. Behner and L. Bellucci and R. Berbeco and J. Berdugo and P. Berges and B. Bertucci and Betev, {B. L.} and M. Biasini and M. Biglietti and A. Biland and Blaising, {J. J.} and Blyth, {S. C.} and Bobbink, {G. J.} and A. B{\"o}hm and L. Boldizs{\'a}r and B. Borgia and S. Bottai and D. Bourilkov and M. Bourquin and S. Braccini and Branson, {J. G.} and F. Brochu and A. Buijs and Burger, {J. D.} and Burger, {W. J.} and Cai, {X. D.} and M. Capell and {Cara Romeo}, G. and G. Carlino and A. Cartacci and J. Casaus and F. Cavallari and N. Cavallo and C. Cecchi and M. Cerrada and M. Chamizo and Chang, {Y. H.} and M. Chemarin and A. Chen and G. Chen and Chen, {G. M.} and Chen, {H. F.} and Chen, {H. S.} and G. Chiefari and L. Cifarelli and F. Cindolo and I. Clare and R. Clare and G. Coignet and N. Colino and S. Costantini and {De la Cruz}, B. and S. Cucciarelli and {Van Dalen}, {J. A.} and {De Asmundis}, R. and P. D{\'e}glon and J. Debreczeni and A. Degr{\'e} and K. Deiters and {Della Volpe}, D. and E. Delmeire and P. Denes and F. DeNotaristefani and {De Salvo}, A. and M. Diemoz and M. Dierckxsens and {Van Dierendonck}, D. and C. Dionisi and M. Dittmar and et.al",
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TY - JOUR

T1 - Double-tag events in two-photon collisions at LEP

AU - Achard, P.

AU - Adriani, O.

AU - Aguilar-Benitez, M.

AU - Alcaraz, J.

AU - Alemanni, G.

AU - Allaby, J.

AU - Aloisio, A.

AU - Alviggi, M. G.

AU - Anderhub, H.

AU - Andreev, V. P.

AU - Anselmo, F.

AU - Arefiev, A.

AU - Azemoon, T.

AU - Aziz, T.

AU - Bagnaia, P.

AU - Bajo, A.

AU - Baksay, G.

AU - Baksay, L.

AU - Baldew, S. V.

AU - Banerjee, S.

AU - Banerjee, Sw

AU - Barczyk, A.

AU - Barillère, R.

AU - Bartalini, P.

AU - Basile, M.

AU - Batalova, N.

AU - Battiston, R.

AU - Bay, A.

AU - Becattini, F.

AU - Becker, U.

AU - Behner, F.

AU - Bellucci, L.

AU - Berbeco, R.

AU - Berdugo, J.

AU - Berges, P.

AU - Bertucci, B.

AU - Betev, B. L.

AU - Biasini, M.

AU - Biglietti, M.

AU - Biland, A.

AU - Blaising, J. J.

AU - Blyth, S. C.

AU - Bobbink, G. J.

AU - Böhm, A.

AU - Boldizsár, L.

AU - Borgia, B.

AU - Bottai, S.

AU - Bourilkov, D.

AU - Bourquin, M.

AU - Braccini, S.

AU - Branson, J. G.

AU - Brochu, F.

AU - Buijs, A.

AU - Burger, J. D.

AU - Burger, W. J.

AU - Cai, X. D.

AU - Capell, M.

AU - Cara Romeo, G.

AU - Carlino, G.

AU - Cartacci, A.

AU - Casaus, J.

AU - Cavallari, F.

AU - Cavallo, N.

AU - Cecchi, C.

AU - Cerrada, M.

AU - Chamizo, M.

AU - Chang, Y. H.

AU - Chemarin, M.

AU - Chen, A.

AU - Chen, G.

AU - Chen, G. M.

AU - Chen, H. F.

AU - Chen, H. S.

AU - Chiefari, G.

AU - Cifarelli, L.

AU - Cindolo, F.

AU - Clare, I.

AU - Clare, R.

AU - Coignet, G.

AU - Colino, N.

AU - Costantini, S.

AU - De la Cruz, B.

AU - Cucciarelli, S.

AU - Van Dalen, J. A.

AU - De Asmundis, R.

AU - Déglon, P.

AU - Debreczeni, J.

AU - Degré, A.

AU - Deiters, K.

AU - Della Volpe, D.

AU - Delmeire, E.

AU - Denes, P.

AU - DeNotaristefani, F.

AU - De Salvo, A.

AU - Diemoz, M.

AU - Dierckxsens, M.

AU - Van Dierendonck, D.

AU - Dionisi, C.

AU - Dittmar, M.

AU - et.al,

PY - 2002/4/4

Y1 - 2002/4/4

N2 - Double-tag events in two-photon collisions are studied using the L3 detector at LEP centre-of-mass energies from √s = 189 GeV to 209 GeV. The cross sections of the e+e- → e+e-hadrons and y*y* → hadrons processes are measured as a function of the product of the photon virtualities, Q2 = √Q1 2Q2 2, of the two-photon mass, Wyy, and of the variable Y = 1n(Wyy 2/Q2). The average photon virtuality is (Q1 2) = (Q2 2) = 16 GeV2. The results are in agreement with next-to-leading order calculations for the process y*y* → qq̄ in the interval 2 ≤ Y ≤ 5. An excess is observed in the interval 5 <Y ≤ 7, corresponding to Wyy greater than 40 GeV. This may be interpreted as a contribution of resolved photon QCD processes or the onset of BFKL phenomena.

AB - Double-tag events in two-photon collisions are studied using the L3 detector at LEP centre-of-mass energies from √s = 189 GeV to 209 GeV. The cross sections of the e+e- → e+e-hadrons and y*y* → hadrons processes are measured as a function of the product of the photon virtualities, Q2 = √Q1 2Q2 2, of the two-photon mass, Wyy, and of the variable Y = 1n(Wyy 2/Q2). The average photon virtuality is (Q1 2) = (Q2 2) = 16 GeV2. The results are in agreement with next-to-leading order calculations for the process y*y* → qq̄ in the interval 2 ≤ Y ≤ 5. An excess is observed in the interval 5 <Y ≤ 7, corresponding to Wyy greater than 40 GeV. This may be interpreted as a contribution of resolved photon QCD processes or the onset of BFKL phenomena.

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U2 - 10.1016/S0370-2693(02)01340-0

DO - 10.1016/S0370-2693(02)01340-0

M3 - Article

VL - 531

SP - 39

EP - 51

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-2

ER -