Di-jet production in photon-photon collisions at √See from 189 to 209 GeV

G. Abbiendi; C. Ainsley; P. F. Åkesson; G. Alexander; J. Allison; P. Amaral; G. Anagnostou; K. J. Anderson; S. Arcelli; S. Asai; D. Axen; G. Azuelos; I. Bailey; E. Barberio; R. J. Barlow; R. J. Batley; P. Bechtle; T. Behnke; K. W. Bell; P. J. Bell; G. Bella; A. Bellerive; G. Benelli; S. Bethke; O. Biebel; I. J. Bloodworth; O. Boeriu; P. Bock; D. Bonacorsi; M. Boutemeur; S. Braibant; L. Brigliadori; R. M. Brown; K. Buesser; H. J. Burckhart; S. Campana; R. K. Carnegie; B. Caron; A. A. Carter; J. R. Carter; C. Y. Chang; D. G. Charlton; A. Csilling; M. Cuffiani; S. Dado; S. Dallison; A. de Roeck; E. A. de Wolf; K. Desch; B. Dienes; M. Donkers; J. Dubbert; E. Duchovni; G. Duckeck; I. P. Duerdoth; E. Elfgren; E. Etzion; F. Fabbri; L. Feld; P. Ferrari; F. Fiedler; I. Fleck; M. Ford; A. Frey; A. Fürtjes; P. Gagnon; J. W. Gary; G. Gaycken; C. Geich-Gimbel; G. Giacomelli; P. Giacomelli; M. Giunta; J. Goldberg; E. Gross; J. Grunhaus; M. Gruwé; P. O. Gunther; A. Gupta; C. Hajdu; M. Hamann; G. G. Hanson; K. Harder; A. Harel; M. Harin-Dirac; M. Hauschild; J. Hauschildt; C. M. Hawkes; R. Hawkings; R. J. Hemingway; C. Hensel; G. Herten; R. D. Heuer; J. C. Hill; K. Hoffman; R. J. Homer; D. Horváth; R. Howard; P. Igo-Kemenes; K. Ishii; H. Jeremie; P. Jovanovic; T. R. Junk; N. Kanaya; J. Kanzaki; G. Karapetian; D. Karlen; V. Kartvelishvili; K. Kawagoe; T. Kawamoto; R. K. Keeler; R. G. Kellogg; B. W. Kennedy; D. H. Kim; K. Klein; A. Klier; S. Kluth; T. Kobayashi; M. Kobel; S. Komamiya; L. Kormos; T. Krämer; T. Kress; P. Krieger; J. von Krogh; D. Krop; K. Kruger; T. Kuhl; M. Kupper; G. D. Lafferty; H. Landsman; D. Lanske; J. G. Layter; A. Leins; D. Lellouch; J. Letts; L. Levinson; J. Lillich; S. L. Lloyd; F. K. Loebinger; J. Lu; J. Ludwig; A. Macpherson; W. Mader; S. Marcellini; T. E. Marchant; A. J. Martin; J. P. Martin; G. Masetti; T. Mashimo; P. Mättig; W. J. McDonald; J. McKenna; T. J. McMahon; R. A. McPherson; F. Meijers; P. Mendez-Lorenzo; W. Menges; F. S. Merritt; H. Mes; A. Michelini; S. Mihara; G. Mikenberg; D. J. Miller; S. Moed; W. Mohr; T. Mori; A. Mutter; K. Nagai; I. Nakamura; H. A. Neal; R. Nisius; S. W. O'Neale; A. Oh; A. Okpara; M. J. Oreglia; S. Orito; C. Pahl; G. Pásztor; J. R. Pater; G. N. Patrick; J. E. Pilcher; J. Pinfold; D. E. Plane; B. Poli; J. Polok; O. Pooth; M. Przybycień; A. Quadt; K. Rabbertz; C. Rembser; P. Renkel; H. Rick; J. M. Roney; S. Rosati; Y. Rozen; K. Runge; K. Sachs; T. Saeki; O. Sahr; E. K.G. Sarkisyan; A. D. Schaile; O. Schaile; P. Scharff-Hansen; J. Schieck; T. Schörner-Sadenius; M. Schröder; M. Schumacher; C. Schwick; W. G. Scott; R. Seuster; T. G. Shears; B. C. Shen; P. Sherwood; G. Siroli; A. Skuja; A. M. Smith; R. Sobie; S. Söldner-Rembold; F. Spano; A. Stahl; K. Stephens; D. Strom; R. Ströhmer; S. Tarem; M. Tasevsky; R. J. Taylor; R. Teuscher; M. A. Thomson; E. Torrence; D. Toya; P. Tran; T. Trefzger; A. Tricoli; I. Trigger; Z. Trócsányi; E. Tsur; M. F. Turner-Watson; I. Ueda; B. Ujvári; B. Vachon; C. F. Vollmer; P. Vannerem; M. Verzocchi; H. Voss; J. Vossebeld; D. Waller; C. P. Ward; D. R. Ward; P. M. Watkins; A. T. Watson; N. K. Watson; P. S. Wells; T. Wengler; N. Wermes; D. Wetterling; G. W. Wilson; J. A. Wilson; G. Wolf; T. R. Wyatt; S. Yamashita; D. Zer-Zion; L. Zivkovic

doi:10.1140/epjc/s2003-01360-8

Di-jet production in photon-photon collisions at √S_ee from 189 to 209 GeV

G. Abbiendi, C. Ainsley, P. F. Åkesson, G. Alexander, J. Allison, P. Amaral, G. Anagnostou, K. J. Anderson, S. Arcelli, S. Asai, D. Axen, G. Azuelos^*, I. Bailey, E. Barberio, R. J. Barlow, R. J. Batley, P. Bechtle, T. Behnke, K. W. Bell, P. J. BellG. Bella, A. Bellerive, G. Benelli, S. Bethke, O. Biebel, I. J. Bloodworth, O. Boeriu, P. Bock, D. Bonacorsi, M. Boutemeur, S. Braibant, L. Brigliadori, R. M. Brown, K. Buesser, H. J. Burckhart, S. Campana, R. K. Carnegie, B. Caron, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, A. Csilling, M. Cuffiani, S. Dado, S. Dallison, A. de Roeck, E. A. de Wolf, K. Desch, B. Dienes, M. Donkers, J. Dubbert, E. Duchovni, G. Duckeck, I. P. Duerdoth, E. Elfgren, E. Etzion, F. Fabbri, L. Feld, P. Ferrari, F. Fiedler, I. Fleck, M. Ford, A. Frey, A. Fürtjes, P. Gagnon, J. W. Gary, G. Gaycken, C. Geich-Gimbel, G. Giacomelli, P. Giacomelli, M. Giunta, J. Goldberg, E. Gross, J. Grunhaus, M. Gruwé, P. O. Gunther, A. Gupta, C. Hajdu, M. Hamann, G. G. Hanson, K. Harder, A. Harel, M. Harin-Dirac, M. Hauschild, J. Hauschildt, C. M. Hawkes, R. Hawkings, R. J. Hemingway, C. Hensel, G. Herten, R. D. Heuer, J. C. Hill, K. Hoffman, R. J. Homer, D. Horváth, R. Howard, P. Igo-Kemenes, K. Ishii, H. Jeremie, P. Jovanovic, T. R. Junk, N. Kanaya, J. Kanzaki, G. Karapetian, D. Karlen, V. Kartvelishvili, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, D. H. Kim, K. Klein, A. Klier, S. Kluth, T. Kobayashi, M. Kobel, S. Komamiya, L. Kormos, T. Krämer, T. Kress, P. Krieger, J. von Krogh, D. Krop, K. Kruger, T. Kuhl, M. Kupper, G. D. Lafferty, H. Landsman, D. Lanske, J. G. Layter, A. Leins, D. Lellouch, J. Letts, L. Levinson, J. Lillich, S. L. Lloyd, F. K. Loebinger, J. Lu, J. Ludwig, A. Macpherson, W. Mader, S. Marcellini, T. E. Marchant, A. J. Martin, J. P. Martin, G. Masetti, T. Mashimo, P. Mättig, W. J. McDonald, J. McKenna, T. J. McMahon, R. A. McPherson, F. Meijers, P. Mendez-Lorenzo, W. Menges, F. S. Merritt, H. Mes, A. Michelini, S. Mihara, G. Mikenberg, D. J. Miller, S. Moed, W. Mohr, T. Mori, A. Mutter, K. Nagai, I. Nakamura, H. A. Neal, R. Nisius, S. W. O'Neale, A. Oh, A. Okpara, M. J. Oreglia, S. Orito, C. Pahl, G. Pásztor, J. R. Pater, G. N. Patrick, J. E. Pilcher, J. Pinfold, D. E. Plane, B. Poli, J. Polok, O. Pooth, M. Przybycień, A. Quadt, K. Rabbertz, C. Rembser, P. Renkel, H. Rick, J. M. Roney, S. Rosati, Y. Rozen, K. Runge, K. Sachs, T. Saeki, O. Sahr, E. K.G. Sarkisyan, A. D. Schaile, O. Schaile, P. Scharff-Hansen, J. Schieck, T. Schörner-Sadenius, M. Schröder, M. Schumacher, C. Schwick, W. G. Scott, R. Seuster, T. G. Shears, B. C. Shen, P. Sherwood, G. Siroli, A. Skuja, A. M. Smith, R. Sobie, S. Söldner-Rembold, F. Spano, A. Stahl, K. Stephens, D. Strom, R. Ströhmer, S. Tarem, M. Tasevsky, R. J. Taylor, R. Teuscher, M. A. Thomson, E. Torrence, D. Toya, P. Tran, T. Trefzger, A. Tricoli, I. Trigger, Z. Trócsányi, E. Tsur, M. F. Turner-Watson, I. Ueda, B. Ujvári, B. Vachon, C. F. Vollmer, P. Vannerem, M. Verzocchi, H. Voss, J. Vossebeld, D. Waller, C. P. Ward, D. R. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. S. Wells, T. Wengler, N. Wermes, D. Wetterling, G. W. Wilson, J. A. Wilson, G. Wolf, T. R. Wyatt, S. Yamashita, D. Zer-Zion, L. Zivkovic

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

Di-jet production is studied in collisions of quasi-real photons at e ⁺e^- centre-of-mass energies √s_ee from 189 to 209 GeV at LEP. The data were collected with the OPAL detector. Jets are reconstructed using an inclusive k_⊥-clustering algorithm for all cross-section measurements presented. A cone jet algorithm is used in addition to study the different structure of the jets resulting from either of the algorithms. The inclusive di-jet cross-section is measured as a function of the mean transverse energy Ē_T^jet of the two leading jets, and as a function of the estimated fraction of the photon momentum carried by the parton entering the hard sub-process, x_γ, for different regions of Ē_T^jet. Angular distributions in di-jet events are measured and used to demonstrate the dominance of quark and gluon initiated processes in different regions of phase space. Furthermore the inclusive di-jet cross-section as a function of |η^jet| and |Δη^jet| is presented, where η^jet is the jet pseudo-rapidity. Different regions of the x_γ⁺-x _γ^--space are explored to study and control the influence of an underlying event. The results are compared to next-to-leading order perturbative QCD calculations and to the predictions of the leading order Monte Carlo generator PYTHIA.

Original language	English
Pages (from-to)	307-325
Number of pages	19
Journal	European Physical Journal C
Volume	31
Issue number	3
DOIs	https://doi.org/10.1140/epjc/s2003-01360-8
Publication status	Published - 2003 Nov
Externally published	Yes

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

Access to Document

10.1140/epjc/s2003-01360-8

Cite this

Abbiendi, G., Ainsley, C., Åkesson, P. F., Alexander, G., Allison, J., Amaral, P., Anagnostou, G., Anderson, K. J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R. J., Batley, R. J., Bechtle, P., Behnke, T., Bell, K. W., ... Zivkovic, L. (2003). Di-jet production in photon-photon collisions at √S_ee from 189 to 209 GeV. European Physical Journal C, 31(3), 307-325. https://doi.org/10.1140/epjc/s2003-01360-8

Abbiendi, G, Ainsley, C, Åkesson, PF, Alexander, G, Allison, J, Amaral, P, Anagnostou, G, Anderson, KJ, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Bailey, I, Barberio, E, Barlow, RJ, Batley, RJ, Bechtle, P, Behnke, T, Bell, KW, Bell, PJ, Bella, G, Bellerive, A, Benelli, G, Bethke, S, Biebel, O, Bloodworth, IJ, Boeriu, O, Bock, P, Bonacorsi, D, Boutemeur, M, Braibant, S, Brigliadori, L, Brown, RM, Buesser, K, Burckhart, HJ, Campana, S, Carnegie, RK, Caron, B, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Csilling, A, Cuffiani, M, Dado, S, Dallison, S, de Roeck, A, de Wolf, EA, Desch, K, Dienes, B, Donkers, M, Dubbert, J, Duchovni, E, Duckeck, G, Duerdoth, IP, Elfgren, E, Etzion, E, Fabbri, F, Feld, L, Ferrari, P, Fiedler, F, Fleck, I, Ford, M, Frey, A, Fürtjes, A, Gagnon, P, Gary, JW, Gaycken, G, Geich-Gimbel, C, Giacomelli, G, Giacomelli, P, Giunta, M, Goldberg, J, Gross, E, Grunhaus, J, Gruwé, M, Gunther, PO, Gupta, A, Hajdu, C, Hamann, M, Hanson, GG, Harder, K, Harel, A, Harin-Dirac, M, Hauschild, M, Hauschildt, J, Hawkes, CM, Hawkings, R, Hemingway, RJ, Hensel, C, Herten, G, Heuer, RD, Hill, JC, Hoffman, K, Homer, RJ, Horváth, D, Howard, R, Igo-Kemenes, P, Ishii, K, Jeremie, H, Jovanovic, P, Junk, TR, Kanaya, N, Kanzaki, J, Karapetian, G, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Keeler, RK, Kellogg, RG, Kennedy, BW, Kim, DH, Klein, K, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Komamiya, S, Kormos, L, Krämer, T, Kress, T, Krieger, P, von Krogh, J, Krop, D, Kruger, K, Kuhl, T, Kupper, M, Lafferty, GD, Landsman, H, Lanske, D, Layter, JG, Leins, A, Lellouch, D, Letts, J, Levinson, L, Lillich, J, Lloyd, SL, Loebinger, FK, Lu, J, Ludwig, J, Macpherson, A, Mader, W, Marcellini, S, Marchant, TE, Martin, AJ, Martin, JP, Masetti, G, Mashimo, T, Mättig, P, McDonald, WJ, McKenna, J, McMahon, TJ, McPherson, RA, Meijers, F, Mendez-Lorenzo, P, Menges, W, Merritt, FS, Mes, H, Michelini, A, Mihara, S, Mikenberg, G, Miller, DJ, Moed, S, Mohr, W, Mori, T, Mutter, A, Nagai, K, Nakamura, I, Neal, HA, Nisius, R, O'Neale, SW, Oh, A, Okpara, A, Oreglia, MJ, Orito, S, Pahl, C, Pásztor, G, Pater, JR, Patrick, GN, Pilcher, JE, Pinfold, J, Plane, DE, Poli, B, Polok, J, Pooth, O, Przybycień, M, Quadt, A, Rabbertz, K, Rembser, C, Renkel, P, Rick, H, Roney, JM, Rosati, S, Rozen, Y, Runge, K, Sachs, K, Saeki, T, Sahr, O, Sarkisyan, EKG, Schaile, AD, Schaile, O, Scharff-Hansen, P, Schieck, J, Schörner-Sadenius, T, Schröder, M, Schumacher, M, Schwick, C, Scott, WG, Seuster, R, Shears, TG, Shen, BC, Sherwood, P, Siroli, G, Skuja, A, Smith, AM, Sobie, R, Söldner-Rembold, S, Spano, F, Stahl, A, Stephens, K, Strom, D, Ströhmer, R, Tarem, S, Tasevsky, M, Taylor, RJ, Teuscher, R, Thomson, MA, Torrence, E, Toya, D, Tran, P, Trefzger, T, Tricoli, A, Trigger, I, Trócsányi, Z, Tsur, E, Turner-Watson, MF, Ueda, I, Ujvári, B, Vachon, B, Vollmer, CF, Vannerem, P, Verzocchi, M, Voss, H, Vossebeld, J, Waller, D, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wengler, T, Wermes, N, Wetterling, D, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Zer-Zion, D & Zivkovic, L 2003, 'Di-jet production in photon-photon collisions at √S_ee from 189 to 209 GeV', European Physical Journal C, vol. 31, no. 3, pp. 307-325. https://doi.org/10.1140/epjc/s2003-01360-8

@article{c31d00d6713d49a7a3ffef5ff328466d,

title = "Di-jet production in photon-photon collisions at √See from 189 to 209 GeV",

abstract = "Di-jet production is studied in collisions of quasi-real photons at e +e- centre-of-mass energies √see from 189 to 209 GeV at LEP. The data were collected with the OPAL detector. Jets are reconstructed using an inclusive k⊥-clustering algorithm for all cross-section measurements presented. A cone jet algorithm is used in addition to study the different structure of the jets resulting from either of the algorithms. The inclusive di-jet cross-section is measured as a function of the mean transverse energy ĒTjet of the two leading jets, and as a function of the estimated fraction of the photon momentum carried by the parton entering the hard sub-process, xγ, for different regions of ĒTjet. Angular distributions in di-jet events are measured and used to demonstrate the dominance of quark and gluon initiated processes in different regions of phase space. Furthermore the inclusive di-jet cross-section as a function of |ηjet| and |Δηjet| is presented, where ηjet is the jet pseudo-rapidity. Different regions of the xγ+-x γ--space are explored to study and control the influence of an underlying event. The results are compared to next-to-leading order perturbative QCD calculations and to the predictions of the leading order Monte Carlo generator PYTHIA.",

author = "G. Abbiendi and C. Ainsley and {\AA}kesson, {P. F.} and G. Alexander and J. Allison and P. Amaral and G. Anagnostou and Anderson, {K. J.} and S. Arcelli and S. Asai and D. Axen and G. Azuelos and I. Bailey and E. Barberio and Barlow, {R. J.} and Batley, {R. J.} and P. Bechtle and T. Behnke and Bell, {K. W.} and Bell, {P. J.} and G. Bella and A. Bellerive and G. Benelli and S. Bethke and O. Biebel and Bloodworth, {I. J.} and O. Boeriu and P. Bock and D. Bonacorsi and M. Boutemeur and S. Braibant and L. Brigliadori and Brown, {R. M.} and K. Buesser and Burckhart, {H. J.} and S. Campana and Carnegie, {R. K.} and B. Caron and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and A. Csilling and M. Cuffiani and S. Dado and S. Dallison and {de Roeck}, A. and {de Wolf}, {E. A.} and K. Desch and B. Dienes and M. Donkers and J. Dubbert and E. Duchovni and G. Duckeck and Duerdoth, {I. P.} and E. Elfgren and E. Etzion and F. Fabbri and L. Feld and P. Ferrari and F. Fiedler and I. Fleck and M. Ford and A. Frey and A. F{\"u}rtjes and P. Gagnon and Gary, {J. W.} and G. Gaycken and C. Geich-Gimbel and G. Giacomelli and P. Giacomelli and M. Giunta and J. Goldberg and E. Gross and J. Grunhaus and M. Gruw{\'e} and Gunther, {P. O.} and A. Gupta and C. Hajdu and M. Hamann and Hanson, {G. G.} and K. Harder and A. Harel and M. Harin-Dirac and M. Hauschild and J. Hauschildt and Hawkes, {C. M.} and R. Hawkings and Hemingway, {R. J.} and C. Hensel and G. Herten and Heuer, {R. D.} and Hill, {J. C.} and K. Hoffman and Homer, {R. J.} and D. Horv{\'a}th and R. Howard and P. Igo-Kemenes and K. Ishii and H. Jeremie and P. Jovanovic and Junk, {T. R.} and N. Kanaya and J. Kanzaki and G. Karapetian and D. Karlen and V. Kartvelishvili and K. Kawagoe and T. Kawamoto and Keeler, {R. K.} and Kellogg, {R. G.} and Kennedy, {B. W.} and Kim, {D. H.} and K. Klein and A. Klier and S. Kluth and T. Kobayashi and M. Kobel and S. Komamiya and L. Kormos and T. Kr{\"a}mer and T. Kress and P. Krieger and {von Krogh}, J. and D. Krop and K. Kruger and T. Kuhl and M. Kupper and Lafferty, {G. D.} and H. Landsman and D. Lanske and Layter, {J. G.} and A. Leins and D. Lellouch and J. Letts and L. Levinson and J. Lillich and Lloyd, {S. L.} and Loebinger, {F. K.} and J. Lu and J. Ludwig and A. Macpherson and W. Mader and S. Marcellini and Marchant, {T. E.} and Martin, {A. J.} and Martin, {J. P.} and G. Masetti and T. Mashimo and P. M{\"a}ttig and McDonald, {W. J.} and J. McKenna and McMahon, {T. J.} and McPherson, {R. A.} and F. Meijers and P. Mendez-Lorenzo and W. Menges and Merritt, {F. S.} and H. Mes and A. Michelini and S. Mihara and G. Mikenberg and Miller, {D. J.} and S. Moed and W. Mohr and T. Mori and A. Mutter and K. Nagai and I. Nakamura and Neal, {H. A.} and R. Nisius and O'Neale, {S. W.} and A. Oh and A. Okpara and Oreglia, {M. J.} and S. Orito and C. Pahl and G. P{\'a}sztor and Pater, {J. R.} and Patrick, {G. N.} and Pilcher, {J. E.} and J. Pinfold and Plane, {D. E.} and B. Poli and J. Polok and O. Pooth and M. Przybycie{\'n} and A. Quadt and K. Rabbertz and C. Rembser and P. Renkel and H. Rick and Roney, {J. M.} and S. Rosati and Y. Rozen and K. Runge and K. Sachs and T. Saeki and O. Sahr and Sarkisyan, {E. K.G.} and Schaile, {A. D.} and O. Schaile and P. Scharff-Hansen and J. Schieck and T. Sch{\"o}rner-Sadenius and M. Schr{\"o}der and M. Schumacher and C. Schwick and Scott, {W. G.} and R. Seuster and Shears, {T. G.} and Shen, {B. C.} and P. Sherwood and G. Siroli and A. Skuja and Smith, {A. M.} and R. Sobie and S. S{\"o}ldner-Rembold and F. Spano and A. Stahl and K. Stephens and D. Strom and R. Str{\"o}hmer and S. Tarem and M. Tasevsky and Taylor, {R. J.} and R. Teuscher and Thomson, {M. A.} and E. Torrence and D. Toya and P. Tran and T. Trefzger and A. Tricoli and I. Trigger and Z. Tr{\'o}cs{\'a}nyi and E. Tsur and Turner-Watson, {M. F.} and I. Ueda and B. Ujv{\'a}ri and B. Vachon and Vollmer, {C. F.} and P. Vannerem and M. Verzocchi and H. Voss and J. Vossebeld and D. Waller and Ward, {C. P.} and Ward, {D. R.} and Watkins, {P. M.} and Watson, {A. T.} and Watson, {N. K.} and Wells, {P. S.} and T. Wengler and N. Wermes and D. Wetterling and Wilson, {G. W.} and Wilson, {J. A.} and G. Wolf and Wyatt, {T. R.} and S. Yamashita and D. Zer-Zion and L. Zivkovic",

year = "2003",

month = nov,

doi = "10.1140/epjc/s2003-01360-8",

language = "English",

volume = "31",

pages = "307--325",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "3",

}

TY - JOUR

T1 - Di-jet production in photon-photon collisions at √See from 189 to 209 GeV

AU - Abbiendi, G.

AU - Ainsley, C.

AU - Åkesson, P. F.

AU - Alexander, G.

AU - Allison, J.

AU - Amaral, P.

AU - Anagnostou, G.

AU - Anderson, K. J.

AU - Arcelli, S.

AU - Asai, S.

AU - Axen, D.

AU - Azuelos, G.

AU - Bailey, I.

AU - Barberio, E.

AU - Barlow, R. J.

AU - Batley, R. J.

AU - Bechtle, P.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bell, P. J.

AU - Bella, G.

AU - Bellerive, A.

AU - Benelli, G.

AU - Bethke, S.

AU - Biebel, O.

AU - Bloodworth, I. J.

AU - Boeriu, O.

AU - Bock, P.

AU - Bonacorsi, D.

AU - Boutemeur, M.

AU - Braibant, S.

AU - Brigliadori, L.

AU - Brown, R. M.

AU - Buesser, K.

AU - Burckhart, H. J.

AU - Campana, S.

AU - Carnegie, R. K.

AU - Caron, B.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Csilling, A.

AU - Cuffiani, M.

AU - Dado, S.

AU - Dallison, S.

AU - de Roeck, A.

AU - de Wolf, E. A.

AU - Desch, K.

AU - Dienes, B.

AU - Donkers, M.

AU - Dubbert, J.

AU - Duchovni, E.

AU - Duckeck, G.

AU - Duerdoth, I. P.

AU - Elfgren, E.

AU - Etzion, E.

AU - Fabbri, F.

AU - Feld, L.

AU - Ferrari, P.

AU - Fiedler, F.

AU - Fleck, I.

AU - Ford, M.

AU - Frey, A.

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PY - 2003/11

Y1 - 2003/11

N2 - Di-jet production is studied in collisions of quasi-real photons at e +e- centre-of-mass energies √see from 189 to 209 GeV at LEP. The data were collected with the OPAL detector. Jets are reconstructed using an inclusive k⊥-clustering algorithm for all cross-section measurements presented. A cone jet algorithm is used in addition to study the different structure of the jets resulting from either of the algorithms. The inclusive di-jet cross-section is measured as a function of the mean transverse energy ĒTjet of the two leading jets, and as a function of the estimated fraction of the photon momentum carried by the parton entering the hard sub-process, xγ, for different regions of ĒTjet. Angular distributions in di-jet events are measured and used to demonstrate the dominance of quark and gluon initiated processes in different regions of phase space. Furthermore the inclusive di-jet cross-section as a function of |ηjet| and |Δηjet| is presented, where ηjet is the jet pseudo-rapidity. Different regions of the xγ+-x γ--space are explored to study and control the influence of an underlying event. The results are compared to next-to-leading order perturbative QCD calculations and to the predictions of the leading order Monte Carlo generator PYTHIA.

AB - Di-jet production is studied in collisions of quasi-real photons at e +e- centre-of-mass energies √see from 189 to 209 GeV at LEP. The data were collected with the OPAL detector. Jets are reconstructed using an inclusive k⊥-clustering algorithm for all cross-section measurements presented. A cone jet algorithm is used in addition to study the different structure of the jets resulting from either of the algorithms. The inclusive di-jet cross-section is measured as a function of the mean transverse energy ĒTjet of the two leading jets, and as a function of the estimated fraction of the photon momentum carried by the parton entering the hard sub-process, xγ, for different regions of ĒTjet. Angular distributions in di-jet events are measured and used to demonstrate the dominance of quark and gluon initiated processes in different regions of phase space. Furthermore the inclusive di-jet cross-section as a function of |ηjet| and |Δηjet| is presented, where ηjet is the jet pseudo-rapidity. Different regions of the xγ+-x γ--space are explored to study and control the influence of an underlying event. The results are compared to next-to-leading order perturbative QCD calculations and to the predictions of the leading order Monte Carlo generator PYTHIA.

UR - http://www.scopus.com/inward/record.url?scp=20244364481&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=20244364481&partnerID=8YFLogxK

U2 - 10.1140/epjc/s2003-01360-8

DO - 10.1140/epjc/s2003-01360-8

M3 - Article

AN - SCOPUS:20244364481

SN - 1434-6044

VL - 31

SP - 307

EP - 325

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

Di-jet production in photon-photon collisions at √S_ee from 189 to 209 GeV

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