Search for QCD instanton-induced processes in deep-inelastic scattering at HERA
(2002) In European Physical Journal C. Particles and Fields 25(4). p.495-509- Abstract
- Signals of QCD instanton-induced processes are searched for in deep-inelastic scattering (DIS) at the electron-proton collider HERA in a kinematic region defined by the Bjorken-scaling variables x > 10(-3), 0.1 < y < 0.6 and photon virtualities 10 less than or similar to Q(2) < 100 GeV2. Several observables characterising hadronic final state properties of QCD instanton-induced events are exploited to identify a potentially instanton-enriched domain. While an excess of events with instanton-like topology is observed it cannot be claimed significant given the uncertainty of the standard DIS background simulation. Upper limits on the cross-section for instanton-induced processes of between 60 pb and 1000 pb are set dependent on... (More)
- Signals of QCD instanton-induced processes are searched for in deep-inelastic scattering (DIS) at the electron-proton collider HERA in a kinematic region defined by the Bjorken-scaling variables x > 10(-3), 0.1 < y < 0.6 and photon virtualities 10 less than or similar to Q(2) < 100 GeV2. Several observables characterising hadronic final state properties of QCD instanton-induced events are exploited to identify a potentially instanton-enriched domain. While an excess of events with instanton-like topology is observed it cannot be claimed significant given the uncertainty of the standard DIS background simulation. Upper limits on the cross-section for instanton-induced processes of between 60 pb and 1000 pb are set dependent on the kinematic domain considered. The data do not exclude the cross-section predicted by instanton perturbation theory for small instanton sizes. At large instanton sizes a naive extrapolation of instanton perturbation theory yields a cross-section in the range of sensitivity of this study. Such a cross-section is not observed, in agreement with non-perturbative lattice simulations of the QCD vacuum. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/320726
- author
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal C. Particles and Fields
- volume
- 25
- issue
- 4
- pages
- 495 - 509
- publisher
- Springer
- external identifiers
-
- wos:000179928900001
- scopus:0036878195
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s2002-01039-8
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Particle Physics (011013002), Chemical Physics (S) (011001060)
- id
- 076a4ee5-6ef9-4107-a7ea-518085664dda (old id 320726)
- date added to LUP
- 2016-04-01 15:55:42
- date last changed
- 2023-01-04 20:06:50
@article{076a4ee5-6ef9-4107-a7ea-518085664dda,
abstract = {{Signals of QCD instanton-induced processes are searched for in deep-inelastic scattering (DIS) at the electron-proton collider HERA in a kinematic region defined by the Bjorken-scaling variables x > 10(-3), 0.1 < y < 0.6 and photon virtualities 10 less than or similar to Q(2) < 100 GeV2. Several observables characterising hadronic final state properties of QCD instanton-induced events are exploited to identify a potentially instanton-enriched domain. While an excess of events with instanton-like topology is observed it cannot be claimed significant given the uncertainty of the standard DIS background simulation. Upper limits on the cross-section for instanton-induced processes of between 60 pb and 1000 pb are set dependent on the kinematic domain considered. The data do not exclude the cross-section predicted by instanton perturbation theory for small instanton sizes. At large instanton sizes a naive extrapolation of instanton perturbation theory yields a cross-section in the range of sensitivity of this study. Such a cross-section is not observed, in agreement with non-perturbative lattice simulations of the QCD vacuum.}},
author = {{Adloff, C and Andreev, V and Andrieu, B and Anthonis, T and Astvatsatourov, A and Babaev, A and Bahr, J and Baranov, P and Barrelet, E and Bartel, W and Becker, J and Beckingham, M and Beglarian, A and Behnke, O and Beier, C and Belousov, A and Berger, C and Berndt, T and Bizot, JC and Bohme, J and Boudry, V and Braunschweig, W and Brisson, V and Broker, HB and Brown, DP and Bruncko, D and Busser, FW and Bunyatyan, A and Burrage, A and Buschhorn, G and Bystritskaya, L and Campbell, AJ and Carli, T and Caron, S and Cassol-Brunner, F and Clarke, D and Collard, C and Contreras, JG and Coppens, YR and Coughlan, JA and Cousinou, MC and Cox, BE and Cozzika, G and Cvach, J and Dainton, JB and Dau, WD and Daum, K and Davidsson, Mattias and Delcourt, B and Delerue, N and Demirchyan, R and De Roeck, A and De Wolf, EA and Diaconu, C and Dingfelder, J and Dixon, P and Dodonov, V and Dowell, JD and Droutskoi, A and Dubak, A and Duprel, C and Eckerlin, G and Eckstein, D and Efremenko, V and Egli, S and Eichler, R and Eisele, F and Eisenhandler, E and Ellerbrock, M and Elsen, E and Erdmann, M and Erdmann, W and Faulkner, PJW and Favart, L and Fedotov, A and Felst, R and Ferencei, J and Ferron, S and Fleischer, M and Fleischmann, P and Fleming, YH and Flugge, G and Fomenko, A and Foresti, I and Formanek, J and Franke, G and Frising, G and Gabathuler, E and Gabathuler, K and Garvey, J and Gassner, J and Gayler, J and Gerhards, R and Gerlich, C and Ghazaryan, S and Goerlich, L and Gogitidze, N and Grab, C and Grabski, V and Grassler, H and Greenshaw, T and Grindhammer, G and Hadig, T and Haidt, D and Hajduk, L and Haller, L and Haynes, WJ and Heinemann, B and Heinzelmann, G and Henderson, RCW and Hengstmann, S and Henschel, H and Heremans, R and Herrera, G and Herynek, I and Hildebrandt, M and Hilgers, M and Hiller, KH and Hladky, J and Hoting, P and Hoffmann, D and Horisberger, R and Hovhannisyan, A and Hurling, S and Ibbotson, M and Issever, C and Jacquet, M and Jaffre, M and Janauschek, L and Janssen, X and Jemanov, V and Jönsson, Leif and Johnson, C and Johnson, DP and Jones, MAS and Jung, Hannes and Kant, D and Kapichine, M and Karlsson, Martin and Karschnick, O and Keil, F and Keller, N and Kennedy, J and Kenyon, IR and Kermiche, S and Kiesling, C and Kjellberg, Pär and Klein, M and Kleinwort, C and Kluge, T and Knies, G and Koblitz, B and Kolya, SD and Korbel, V and Kostka, P and Kotelnikov, SK and Koutouev, R and Lastovicka, T and Laycock, P and Lebailly, E and Lebedev, A and Leissner, B and Lemrani, R and Lendermann, V and Levonian, S and Lindström, Magnus and List, B and Lobodzinska, E and Lobodzinski, B and Loginov, A and Loktionova, N and Lubimov, V and Luders, S and Luke, D and Lytkin, L and Malden, N and Malinovski, E and Malinovski, I and Mangano, S and Maracek, R and Marage, P and Marks, J and Marshall, R and Martyn, HU and Martyniak, J and Maxfield, SJ and Meer, D and Mehta, A and Meier, K and Meyer, AB and Meyer, H and Meyer, J and Meyer, PO and Mikocki, S and Milstead, D and Mohrdieck, S and Mondragon, MN and Moreau, F and Morozov, A and Morris, JV and Muller, K and Murin, P and Nagovizin, V and Naroska, B and Naumann, J and Naumann, T and Nellen, G and Newman, PR and Niebergall, F and Niebuhr, C and Nix, O and Nowak, G and Olsson, JE and Ozerov, D and Panassik, V and Pascaud, C and Patel, GD and Peez, M and Perez, E and Petrukhin, A and Phillips, JP and Pitzl, D and Poschl, R and Potachnikova, I and Povh, B and Radel, G and Rauschenberger, J and Reimer, P and Reisert, B and Reyna, D and Risler, C and Rizvi, E and Robmann, P and Roosen, R and Rostovtsev, A and Rusakov, S and Rybicki, K and Sankey, DPC and Schatzel, S and Scheins, J and Schilling, FP and Schleper, P and Schmidt, D and Schmidt, D and Schmidt, S and Schmidt, S and Schneider, M and Schoeffel, L and Schoning, A and Schorner, T and Schroder, V and Schultz-Coulon, HC and Schwanenberger, C and Sedlak, K and Sefkow, F and Shekelyan, V and Sheviakov, I and Shtarkov, LN and Sirois, Y and Sloan, T and Smirnov, P and Soloviev, Y and South, D and Spaskov, V and Specka, A and Spitzer, H and Stamen, R and Stella, B and Stiewe, J and Strauch, I and Straumann, U and Swart, M and Tchetchelnitski, S and Thompson, G and Thompson, PD and Tobien, N and Tomasz, F and Traynor, D and Truol, P and Tsipolitis, G and Tsurin, I and Turnau, J and Turney, JE and Tzamariudaki, E and Udluft, S and Uraev, A and Urban, M and Usik, A and Valkar, S and Valkarova, A and Vallee, C and Van Mechelen, P and Vassiliev, S and Vazdik, Y and Vest, A and Vichnevski, A and Wacker, K and Wagner, J and Wallny, R and Waugh, B and Weber, G and Wegener, D and Werner, C and Werner, N and Wessels, M and White, G and Wiesand, S and Wilksen, T and Winde, M and Winter, GG and Wissing, C and Wobisch, M and Woehrling, EE and Wunsch, E and Wyatt, AC and Zacek, J and Zalesak, J and Zhang, Z and Zhokin, A and Zomer, F and zur Nedden, M}},
issn = {{1434-6044}},
language = {{eng}},
number = {{4}},
pages = {{495--509}},
publisher = {{Springer}},
series = {{European Physical Journal C. Particles and Fields}},
title = {{Search for QCD instanton-induced processes in deep-inelastic scattering at HERA}},
url = {{http://dx.doi.org/10.1140/epjc/s2002-01039-8}},
doi = {{10.1140/epjc/s2002-01039-8}},
volume = {{25}},
year = {{2002}},
}