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22 results on '"B. Vujicic"'

1. Stochastic 2-bit null detector

Author

B. Vujicic, B. Antic, P. Sovilj, Dragan Pejic, and Zoran Mitrovic

Subjects
History, Bit (horse), Detector, Null (mathematics), Algorithm, Computer Science Applications, Education, Mathematics
Published
2018

2. Measurement of $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ at low Q2 and x * using the H1 vertex detector at HERA

Author

Daniel Pitzl, J. Zacek, G. Leibenguth, Pavel Murin, M. Ibbotson, B. Stella, Roland Horisberger, A. Valkárová, I. Sheviakov, Stefan Schmitt, F. Cassol-Brunner, A. Makankine, Wolfram Erdmann, G. Buschhorn, D. Ozerov, R. Weber, A. Baghdasaryan, M. Jacquet, D. P. C. Sankey, P. E. Reimer, A. Rostovtsev, M. Goettlich, L. Hajduk, Wolfgang Lange, B. Olivier, Laurent Favart, B. Portheault, A. Vest, O. Behrendt, S. Vinokurova, P. Kostka, T. Anthonis, V. Jemanov, J. Gayler, M. Hildebrandt, S. Hussain, J. Turnau, I. Milcewicz-Mika, I. Tsakov, Sakar Osman, C. Veelken, D. Meer, Matthew Beckingham, T. Laštovička, E. Barrelet, E. Gabathuler, E. Wünsch, Vladimir Palichik, K. H. Hiller, G. Thompson, R. C. W. Henderson, S. Gorbounov, V. Spaskov, Jan Kretzschmar, Anna Kropivnitskaya, V. Chekelian, S. Ghazaryan, J. Kückens, A. Nikiforov, Paul Laycock, E. Malinovski, Z. Rurikova, Emmanuel Sauvan, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, G. Grindhammer, C. Goyon, B. R. Grell, Andrej Liptaj, R. Felst, D. Utkin, J. Bähr, Theodora Papadopoulou, D. Wegener, N. Werner, Y. de Boer, H. Henschel, E. Rizvi, G. D. Patel, K. Wacker, H. Meyer, Georgios Tsipolitis, M. Fleischer, B. List, A. Aktas, D.P. Johnson, P. Van Mechelen, J.C. Bizot, C. Niebuhr, Fabian Zomer, A. Specka, C. Wissing, D. Mladenov, Matthias Ulrich Mozer, R. Marshall, N. Malden, C. Pascaud, L. Finke, Dirk L. Hoffmann, S. Egli, Dusan Bruncko, G. Franke, B. Naroska, I. Foresti, M.-O. Boenig, G. Cozzika, Thorsten Lux, L. Janauschek, S. Ginzburgskaya, Grzegorz Nowak, Stefan Valkar, A. Petrukhin, E. Lobodzinska, C. Kiesling, F. Salvaire, P. D. Thompson, Bogdan Povh, F. Sefkow, M. Urban, D. Haidt, V. Yeganov, T. Greenshaw, Y.C. Zhu, K. Daum, John A Coughlan, Y. Soloviev, W.D. Dau, J. B. Dainton, K. Krastev, T. Hreus, L. Lytkin, A. De Roeck, E. Tzamariudaki, A. J. Campbell, A. Dubak, Y. Vazdik, D. Lüke, M. Peez, Stefania Xella, Leif J. Jönsson, Benoit Roland, J. Cvach, T. Klimkovich, Cristinel Diaconu, Stephen Maxfield, J. Stiewe, J. Bracinik, N. Gogitidze, F. P. Schilling, Christoph Grab, L. Schoeffel, Nicolas Berger, J. Zimmermann, S. Levonian, A. Zhelezov, S. Baudrand, J. Ferencei, M. Martisikova, S. Sch¨atzel, V. Efremenko, S. Mikocki, S. Schmidt, T. Kluge, Guenter Eckerlin, André Schöning, L. Goerlich, Michael R. Wessels, V. Brisson, L. Lindfeld, Zhen Zhang, Ricardo Lopez-Fernandez, S. Baumgartner, Andreas Meyer, A. Usik, T. Frisson, I. Strauch, Philipp Fleischmann, E. Perez, Peter Robmann, A. D.R. Vargas Trevino, B. Vujicic, Jean-Arcady Meyer, P. Baranov, G. Laštovička-Medin, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, A. Rimmer, A. Knutsson, Gero Flucke, M. Kapichine, M. Nozicka, F. Tomasz, G. Knies, B. Delcourt, Magnus Hansson, G. Heinzelmann, V. Dodonov, S. Mangano, F. Moreau, S. J. Aplin, S. Essenov, Ilias Panagoulias, D. Traynor, R. Plačakyte, Katerina Lipka, M. Ismail, David Milstead, P. A. Smirnov, V. Tchoulakov, Pierre Marage, Klaus Desch, A. Falkewicz, R. Eichler, Adrian Perieanu, S. Caron, J. E. Olsson, W. Bartel, F. W. Büsser, J. Zalesak, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, J. V. Morris, I. Glushkov, Gerhard Brandt, S. Backovic, V. Volchinski, I. R. Kenyon, Natasa Raicevic, H. Lueders, C. Risler, Vincent Boudry, A. W. Jung, Xavier Janssen, A. N. Morozov, M. Ellerbrock, W. Yan, D. Perez-Astudillo, M. Gregori, N. Loktionova, A. Bunyatyan, G. Herrera, Bradley Cox, D.K. Nikitin, O. Henshaw, O. Behnke, R. Wolf, B. Wessling, F. Eisele, A. Hovhannisyan, Ankita Mehta, Anton Babaev, J. G. Contreras, C. Gwilliam, A. M. Fomenko, A. Mohamed, J. Wagner, V. P. Andreev, C. Gerlich, M. P. J. Landon, A. Astvatsatourov, P. Prideaux, R. Oganezov, I. Tsurin, K. Sedlák, C. Wigmore, H-C. Schultz-Coulon, H. U. Martyn, Matthias Klein, K. Müller, V. Cerny, D.P. Brown, Judith Katzy, A. Asmone, Y.H. Fleming, David South, Karel Cerny, K. Krüger, V. Lubimov, K. Nankov, L. N. Shtarkov, A. Glazov, V. Korbel, Alexandre Lebedev, C. Werner, Paul Newman, T. Zimmermann, Claus Kleinwort, G. Weber, U. Straumann, Thomas Naumann, Erika Garutti, A. V. Fedotov, L. Bystritskaya, H. Zohrabyan, R.N. Shaw-West, N. Keller, V. Lendermann, and A.-I. Lucaci-Timoce

Subjects
Quark, Quantum chromodynamics, Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, Vertex (curve), High Energy Physics::Experiment, Charm (quantum number), Impact parameter, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Bar (unit)
Abstract

Measurements are presented of inclusive charm and beauty cross sections in e^+p collisions at HERA for values of photon virtuality 12 \le Q^2 \le 60 GeV^2 and of the Bjorken scaling variable 0.0002 \le x \le 0.005. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. Values for the structure functions F_2^{c\bar{c}} and F_2^{b\bar{b}} are obtained. This is the first measurement of F_2^{b\bar{b}} in this kinematic range. The results are found to be compatible with the predictions of perturbative quantum chromodynamics and withprevious measurements of F_2^{c\bar{c}}.

Published
2006

3. Measurement of $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ at high Q 2 using the H1 vertex detector at HERA

Author

G. G. Winter, G. Thompson, A. Nikiforov, Denis Johnson, K. H. Hiller, R. C. W. Henderson, S. Levonian, Jochen Dingfelder, Y.R. Coppens, T. Frisson, I. Strauch, Philipp Fleischmann, A. Baghdasaryan, A. Rostovtsev, Leif J. Jönsson, Carl Gwilliam, Yves Sirois, O. Behrendt, S. Vinokurova, R. Lemrani, P. Kostka, A. Specka, T. Klimkovich, Dirk L. Hoffmann, David South, J-P. Meyer, G. Franke, B. Vujicic, R. Oganezov, D. Utkin, J. Bähr, A. Makankine, G. Buschhorn, Matthias Ulrich Mozer, J. Turnau, Michael Schneider, A. Fedotov, Günter Flügge, J. Zalesak, R. Roosen, Wolfgang Lange, C. Niebuhr, Grzegorz Nowak, D. Ozerov, R. Weber, S. Ginzburgskaya, J. Gayler, R. Koutouev, A. Petrukhin, V. Andreev, M. Hildebrandt, Johannes Haller, Y. Soloviev, L. Lindfeld, J. E. Olsson, W. Bartel, A. D.R. Vargas Trevino, H. U. Martyn, Matthias Klein, C. Kiesling, E. E. Elsen, Ahmed Tarek Abouelfadl Mohamed, V. Lubimov, A. De Roeck, E. Tzamariudaki, A. J. Campbell, C. Wigmore, F. P. Schilling, M.-O. Boenig, John A Coughlan, B. Portheault, F. W. Büsser, K. Sedlak, Magnus Hansson, V. Jemanov, Peter Robmann, S. Mangano, Christoph Grab, E. Malinovski, Emmanuel Sauvan, K. Nankov, Roland Horisberger, V. Lendermann, A. Valkárová, V. Schröder, G. Grindhammer, Nicolas Berger, L. N. Shtarkov, I. R. Kenyon, T. Berndt, E. Perez, N. Werner, Michael R. Wessels, Natasa Raicevic, L. Goerlich, P. D. Thompson, V. Brisson, B. Leissner, S. Backovic, Vincent Boudry, D. P. C. Sankey, J. Zimmermann, R. Gerhards, A. Zhelezov, S. Baudrand, B. Stella, Adrian Perieanu, N. Keller, Martin Karlsson, Paul Newman, Zuzana Rurikova, Stefan Schmitt, A. N. Morozov, V. Yeganov, Paul Laycock, H. Lueders, D. Perez-Astudillo, M. Gregori, A. Dubak, R. Eichler, Georgios Tsipolitis, M. Fleischer, Ewelina Lobodzinska, Gerhard Brandt, Matthew Beckingham, M. Goettlich, T. Laštovička, F. Moreau, S. J. Aplin, V. Volchinski, H. Meyer, Y. Vazdik, R. Demirchyan, D. Lüke, Anna Kropivnitskaya, A. Aktas, E. Barrelet, B. Olivier, V. Chekelian, R. Felst, Xavier Janssen, J. Formánek, L. Bystritskaya, M. Peez, Stefania Xella, David Milstead, Zhen Zhang, D. Meer, E. A. De Wolf, Ch. Berger, Karlheinz Meier, H. Zohrabyan, D.P. Brown, S. Essenov, Ricardo Lopez-Fernandez, S. Baumgartner, Bogdan Povh, F. Sefkow, P. Höting, M. Jacquet, Th. Naumann, K. Gabathuler, D. Wegener, A. Usik, G. Frising, A. Rimmer, I. Herynek, D. Kant, Benno List, Katerina Lipka, E. Gabathuler, A. Knutsson, J. Garvey, Katja Krüger, Amanda R. Vest, Laurent Schoeffel, Judith Katzy, V. Tchoulakov, A. M. Fomenko, V. Efremenko, Y.H. Fleming, S. Mikocki, Sebastian M. Schmidt, C. Gerlich, C. Goyon, H-C. Schultz-Coulon, R. Pöschl, M. Urban, R. Marshall, T. Kluge, Pavel Murin, H. Grässler, Guenter Eckerlin, André Schöning, I. Milcewicz-Mika, M. Ibbotson, C. Duprel, Laurent Favart, W. Yan, J. Cvach, Ringaile Placakyte, N. Loktionova, A. Hovhannisyan, D. Traynor, C. Risler, G. Weber, U. Straumann, Anton Babaev, J. G. Contreras, I. Tsurin, P. Prideaux, P. Baranov, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, M. Ismail, P. Truöl, P. A. Smirnov, J. Wagner, B. Wessling, Juraj Bracinik, D.K. Nikitin, O. Henshaw, C. Wissing, J. Böhme, Murrough Landon, Karel Cerny, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Uraev, S. Gorbounov, J. Zacek, A. Glazov, J. Scheins, K. Müller, Christian Schwanenberger, V. Korbel, Stephen Maxfield, J. Stiewe, Wolfram Erdmann, Andrew Mehta, P. Van Mechelen, N. Gogitidze, W.D. Dau, J. B. Dainton, R. D. Heuer, L. Finke, M. Ellerbrock, G. Herrera, Alexandre Lebedev, Bradley Cox, C. Werner, K. Daum, F. Tomasz, C. Pascaud, G. Knies, S. Egli, S. Ghazaryan, F. Salvaire, D. Haidt, Eram Rizvi, G. Heinzelmann, V. Dodonov, Sascha Caron, E. Wünsch, G. D. Patel, K. Wacker, N. Malden, J. V. Morris, A. Bunyatyan, Dusan Bruncko, B. Naroska, Klaus Kurt Desch, H. Henschel, J.C. Bizot, T. Greenshaw, Erika Garutti, Fabian Zomer, I. Foresti, G. Cozzika, Stefan Valkar, C. Schmitz, H.-B. Bröker, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, J. Ferencei, M. Martisikova, J. Naumann, Gero Flucke, M. Kapichine, M. Nozicka, J. Marks, B. Delcourt, Roger Wolf, T. Anthonis, Claus Kleinwort, S. Schätzel, I. Sheviakov, V. Spaskov, J. Kückens, A. B. Meyer, B. Roland, V. Nagovizin, E. E. Woehrling, Pierre Marage, I. Glushkov, Christian Veelken, O. Behnke, F. Eisele, Daniel Pitzl, A. Asmone, F. Cassol-Brunner, L. Hajduk, L. Lytkin, Cristinel Diaconu, and P. E. Reimer

Subjects
Quantum chromodynamics, Physics, Particle physics, Photon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Structure function, HERA, 01 natural sciences, Transverse plane, 0103 physical sciences, High Energy Physics::Experiment, Vertex detector, Impact parameter, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract

Measurements are presented of inclusive charm and beauty cross sections in e$^+$p collisions at HERA for values of photon virtuality Q$^2$ > 150 GeV$^2$ and of inelasticity 0.1 < y < 0.7. The charm and beauty fractions are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. The data are divided into four regions in Q$^2$ and Bjorken x, and values for the structure functions $F_2^{c\overline{c}}$ and $F_2^{b\overline{b}}$ are obtained. The results are found to be compatible with the predictions of perturbative quantum chromodynamics.

Published
2005

4. [Untitled]

Author

N. Dimic, M. Antov, D. Pericin, and B. Vujicic

Subjects
chemistry.chemical_classification, Basal (phylogenetics), Enzyme, chemistry, Biochemistry, Partition method, Low activity, Polyporus squamosus, Biology, Pectinase, biology.organism_classification, Applied Microbiology and Biotechnology
Abstract

Three-phase partitioning system consisting of 56% (w/v) (NH ) SO in water/10% (v/v) tert-butanol, was used to isolate exo-pectinase from Polyporus squamosus. The low activity of the constitutive exo-pectinase produced in submerged culture was brought to a detectable activity and was then purified 3-fold.

Published
1997

5. Effect of inorganic phosphate on the secretion of pectinolytic enzymes byAspergillus niger

Author

M. Antov, B. Vujicic, S. Kevresan, M. Jarak, and D. Pericin

Subjects
chemistry.chemical_classification, biology, Chemistry, fungi, Aspergillus niger, Pomace, Fungi imperfecti, biology.organism_classification, Phosphate, Applied Microbiology and Biotechnology, chemistry.chemical_compound, Enzyme, Biochemistry, Extracellular, Fermentation, Secretion
Abstract

Inorganic phosphates, taken as NaH 2 PO 4 or KH 2 PO 4 , stimulated the production of pectinolytic enzymes and enhanced by up to two-fold the growth of Aspergillus niger in submerged liquid culture of apple pomace. Production of extracellular enzymes of endo- and exo- types, showed a different response to concentrations of phosphate in the medium

Published
1992

6. Diffractive photoproduction of rho mesons with large momentum transfer at HERA

Author

Grzegorz Nowak, S. Egli, I. Sheviakov, S. Schmitt, J. E. Olsson, W. Bartel, D. Wegener, Y. Soloviev, L. Finke, F. P. Schilling, P. E. Reimer, C. Wigmore, Y.C. Zhu, M.-O. Boenig, A. Petrukhin, K. Daum, A. Vest, O. Behrendt, S. Vinokurova, F. W. Büsser, S. Mangano, Nicolas Berger, Christoph Grab, V. Efremenko, F. Tomasz, I. R. Kenyon, A. Zhelezov, S. Baudrand, G. Knies, Natasa Raicevic, S. Mikocki, S. Ghazaryan, P. Kostka, Adrian Perieanu, Gerhard Brandt, V. Spaskov, V. Volchinski, J. Kückens, K. Wacker, H. Meyer, Vincent Boudry, J. Zacek, Xavier Janssen, H. U. Martyn, K. H. Hiller, A. Baghdasaryan, R. C. W. Henderson, A. Rostovtsev, A. N. Morozov, D. Perez-Astudillo, P. Baranov, D. Lüke, E. Wünsch, Ilias Panagoulias, M. Gregori, J. Turnau, Dave Sankey, Hans-Christian Schultz-Coulon, Daniel Pitzl, D. Utkin, R.N. Shaw-West, J. Bähr, J-P. Meyer, D. Traynor, S. Hussain, O. Henshaw, D. South, Wolfgang Lange, A. Asmone, B. R. Grell, V. Korbel, I. Tsakov, V. Lubimov, M. Goettlich, Katja Krüger, V. Chekelian, G. D. Patel, A. M. Fomenko, Max Klein, A. Specka, F. Cassol-Brunner, Laurent Schoeffel, D.P. Johnson, Paul Laycock, L. Hajduk, V. Brisson, G. Thompson, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, A. D.R. Vargas Trevino, P. Truöl, A. Dubak, A. Falkewicz, E. Malinovski, Emmanuel Sauvan, D.P. Brown, Katerina Lipka, N. Malden, Tomas Hreus, R. Eichler, C. Pascaud, A. Lebedev, J. Gayler, R. Plačakyte, C. Gerlich, Murrough Landon, G. Grindhammer, F. Salvaire, Jan Kretzschmar, D. Haidt, Roland Horisberger, A. Valkárová, V. Tchoulakov, Anton Babaev, Y. Vazdik, M. Ismail, S. Gorbounov, N. Werner, Andrej Liptaj, Pierre Marage, Eram Rizvi, David Milstead, A. Mohamed, W. Yan, P. A. Smirnov, G. Heinzelmann, K. Krastev, K. Nankov, P. Prideaux, V. Dodonov, D. Mladenov, C. Werner, L. N. Shtarkov, J. Zimmermann, N. Loktionova, M. Peez, Stefania Xella, M. Urban, F. Eisele, I. Glushkov, H. Henschel, Theodora Papadopoulou, L. Lindfeld, J.C. Bizot, A. Hovhannisyan, J. V. Morris, P. Van Mechelen, Fabian Zomer, R. Weber, A. Bunyatyan, J.G. Contreras, J. Wagner, I. Tsurin, M. Jacquet, G. Laštovička-Medin, O. Behnke, I. Foresti, G. Cozzika, K. Desch, Guenter Eckerlin, P. D. Thompson, V. Yeganov, Dusan Bruncko, J. Zalesak, Stefan Valkar, L. Bystritskaya, B. Naroska, E. Gabathuler, Karel Cerny, I. Milcewicz-Mika, T. Kluge, F. Moreau, S. J. Aplin, S. Levonian, H. Zohrabyan, C. Schmitz, Y. H. Fleming, T. Greenshaw, Erika Garutti, Hannes Jung, Alexander Zhokin, J. Becker, Pavel Murin, A. Schöning, C. Vallée, Leif J. Jönsson, Benoit Roland, J. Ferencei, M. Martisikova, M. Ibbotson, Emmanuelle Perez, A. Glazov, Zhen Zhang, Sakar Osman, Claus Kleinwort, Ricardo Lopez-Fernandez, S. Essenov, Paul Newman, A. Rimmer, Gero Flucke, Laurent Favart, M. Kapichine, M. Nozicka, G. Herrera, S. Baumgartner, T. Laštovička, M. Beckingham, T. Anthonis, Andreas Meyer, C. Veelken, Matthias Ulrich Mozer, D. Meer, A. Usik, E. Barrelet, A. Knutsson, A. Fedotov, T. Klimkovich, B. Vujicic, B. Delcourt, Peter Robmann, Z. Rurikova, G. Weber, U. Straumann, E. A. De Wolf, Ch. Berger, S. Ginzburgskaya, C. Kiesling, Karlheinz Meier, R. Roosen, Thomas Naumann, A. Nikiforov, S. Schätzel, A. De Roeck, W.D. Dau, Georgios Tsipolitis, M. Fleischer, E. Tzamariudaki, A. J. Campbell, J. B. Dainton, C. Goyon, Y. de Boer, L. Lytkin, Cristinel Diaconu, V. Jemanov, N. Keller, V. Lendermann, Bogdan Povh, F. Sefkow, T. Zimmermann, A.-I. Lucaci-Timoce, C. Risler, Stephen Maxfield, S. Backovic, J. Stiewe, H. Lueders, R. Marshall, C. Gwilliam, Andrew Mehta, J. Bracinik, M. Hildebrandt, A. Aktas, N. Gogitidze, A. Makankine, Judith Katzy, B. Olivier, G. Buschhorn, D. Ozerov, B. Portheault, A. W. Jung, M. Wessels, M. Ellerbrock, G. Leibenguth, Bradley Cox, R. Wolf, B. Wessling, T. Frisson, I. Strauch, Philipp Fleischmann, S. Caron, D.K. Nikitin, K. Müller, B. Stella, Wolfram Erdmann, B. List, J. Cvach, Vladimir Palichik, Ewelina Lobodzinska, C. Wissing, Anna Kropivnitskaya, R. Felst, Thorsten Lux, L. Janauschek, R. Oganezov, K. Sedlák, V. Cerny, S. Schmidt, A. Astvatsatourov, V. Andreev, John A Coughlan, Magnus Hansson, L. Goerlich, Dirk L. Hoffmann, G. Franke, C. Niebuhr, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Particle physics, Photon, Meson, Nuclear Theory, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, Power law, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Momentum transfer, Gamma ray, Perturbative QCD, HERA, Helicity, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract

The diffractive photoproduction of ρ mesons, e p → e ρ Y, with large momentum transfer squared at the proton vertex, |t|, is studied with the H1 detector at HERA using an integrated luminosity of 20.1 pb-1. The photon-proton centre of mass energy spans the range 75 < W < 95 GeV, the photon virtuality is restricted to Q2 < 0.01 GeV2 and the mass MY of the proton remnant is below 5 GeV. The t dependence of the cross section is measured for the range 1.5 < | t | < 10.0 GeV2 and is well described by a power law, d σ / d | t | ∝ | t |- n. The spin density matrix elements, which provide information on the helicity structure of the interaction, are extracted using measurements of angular distributions of the ρ decay products. The data indicate a violation of s-channel helicity conservation, with contributions from both single and double helicity-flip being observed. The results are compared to the predictions of perturbative QCD models., Physics Letters B, 638 (5-6), ISSN:0370-2693, ISSN:0031-9163, ISSN:1873-2445

Published
2006

7. A Determination of Electroweak Parameters at HERA

Author

M. Fleischer, J.E. Olsson, A. Usik, Paul Laycock, Emmanuel Sauvan, Murrough Landon, G. Grindhammer, C. Wissing, S. Gorbounov, N. Werner, F. W. Büsser, P.R. Newman, J. Ferencei, P.D. Thompson, G. Flucke, S. Backovic, Thorsten Lux, A. Glazov, R. Eichler, L. Janauschek, Y. Vazdik, V. Brisson, A. Baghdasaryan, K. Lipka, A. Morozov, G. Knies, B. List, A. Hovhannisyan, Vincent Boudry, B. Roland, L. Favart, Sakar Osman, Sebastian M. Schmidt, N. Gogitidze, A. Petrukhin, W. Bartel, L. Finke, J. Cvach, F. Salvaire, P. Smirnov, C. Niebuhr, C. Veelken, Max Klein, Y.C. Zhu, S. Caron, M. Gregori, A. Fomenko, J.G. Contreras, M. Ibbotson, T. Laštovička, B. Portheault, D. South, V. Yeganov, F. Tomasz, Eram Rizvi, T. Frisson, I. Strauch, P.J.W. Faulkner, M. Ismail, David Milstead, I. Glushkov, B. Olivier, S. Ghazaryan, B. Stella, G. Weber, E. Barrelet, L. Goerlich, X. Janssen, G. Heinzelmann, V. Tchoulakov, V. Dodonov, S. Baumgartner, U. Straumann, R. Oganezov, Alan Campbell, A. Kropivnitskaya, A. Vest, Zhen Zhang, Z. Rurikova, S. Vinokurova, V. Spaskov, A. Zhokin, Y.H. Fleming, K. Daum, V. Cerny, T. Papadopoulou, Ch. Berger, Karlheinz Meier, J. Zálešák, J. Gayler, S. Baudrand, J. Žáček, R. C. W. Henderson, R. Horisberger, M. Hildebrandt, C. Wigmore, Leif J. Jönsson, D. Nikitin, W. Lange, D. Mladenov, P. Baranov, R. Weber, Grazyna Nowak, V. Korbel, V. Efremenko, F. Cassol-Brunner, D. Utkin, C. Kleinwort, R.N. Shaw-West, C. Diaconu, Y. de Boer, Andreas Meyer, P. Van Mechelen, T. Klimkovich, K. Krastev, G. Herrera, Hans-Christian Schultz-Coulon, I. Sheviakov, T. Hreus, P. Kostka, M. Jacquet, K. Krüger, Dave Sankey, K. Müller, S. Hussain, Peter Robmann, M. Peez, V. Jemanov, G. Thompson, A. D. R. Vargas Trevino, V. Palichik, O. Behnke, B. R. Grell, G. Franke, B. Wessling, E. Wünsch, E. Gabathuler, G. D. Patel, B. Naroska, A. Astvatsatourov, Magnus Hansson, V. Lubimov, R. Plačakytė, A. Valkárová, H. Meyer, A. Lebedev, D. Hoffmann, A. Zhelezov, T. Kluge, G. Eckerlin, S. Mangano, A. Specka, I. Milcewicz-Mika, D. Haidt, T. Greenshaw, E. Lobodzinska, N. Malden, S. Schmitt, L. Hajduk, P. Murín, A. Mohamed, A. Schöning, N. Raicevic, H. Lueders, J. Bähr, R. Felst, C. Gerlich, D. Wegener, C. Grab, N. Keller, P. Prideaux, J. Katzy, R. Roosen, M. Martisikova, I. Tsakov, J.V. Morris, K. Nankov, A. Rostovtsev, D.P. Johnson, L. Lytkin, O. Behrendt, J.C. Bizot, N. Loktionova, V. Lendermann, M. Goettlich, C. Goyon, Stephen Maxfield, A. Makankine, P. Marage, D. Perez-Astudillo, K.H. Hiller, M.-O. Boenig, D. Traynor, A. Asmone, J. Stiewe, J. Turnau, L. Lindfeld, E. Garutti, A. Aktas, C. Werner, M. Kapichine, W.D. Dau, E. De Wolf, Andrew Mehta, J. Bracinik, A. Bunyatyan, J. B. Dainton, S. Levonian, P. Fleischmann, T. Zimmermann, I.R. Kenyon, F. Moreau, S. J. Aplin, M. Urban, F. Eisele, A. Fedotov, M. Nozicka, F. Sefkow, A. Dubak, A. Belousov, V. Volchinski, V. Chekelian, A.-I. Lucaci-Timoce, W. Yan, D. Bruncko, Jan Kretzschmar, J. Wagner, C. Risler, S. Egli, Andrej Liptaj, J. Zimmermann, D. Meer, A. W. Jung, M. Wessels, E. Perez, M. Ellerbrock, A. Falkewicz, Stefania Xella, Y. Soloviev, Karel Cerny, B. Delcourt, P. Reimer, Bradley Cox, I. Panagoulias, R. Wolf, J. A. Coughlan, Matthias Ulrich Mozer, D. Pitzl, I. Tsurin, S. Ginzburgskaya, F. Zomer, C. Kiesling, A. De Roeck, B. Vujicic, E. Tzamariudaki, S. Essenov, D. Lüke, L. Bystritskaya, E. Malinovski, S. Rusakov, V. Andreev, T. Anthonis, I. Foresti, G. Cozzika, Stefan Valkar, T. J. Sloan, C. Schmitz, Hannes Jung, P. Truöl, J. Becker, F.-P. Schilling, Bogdan Povh, J. Kückens, C. Pascaud, O. Henshaw, Th. Naumann, A. Nikiforov, R. Marshall, A. Babaev, W. Erdmann, G. Buschhorn, D. Ozerov, S. Mikocki, G. Lastovicka-Medin, S. Schätzel, M. Beckingham, H. U. Martyn, K. Wacker, Klaus Desch, R. Lopez-Fernandez, A. Rimmer, A. Knutsson, H. Henschel, K. Sedlák, H. Zohrabyan, C. Gwilliam, G. Leibenguth, J-P. Meyer, Adrian Perieanu, C. Vallée, Gerhard Brandt, G. Tsipolitis, D.P. Brown, L.N. Shtarkov, Nicolas Berger, Laurent Schoeffel, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, H1 Collaboration, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Quantum chromodynamics, Physics, Particle physics, Nuclear and High Energy Physics, Neutral current, 010308 nuclear & particles physics, Electroweak interaction, High Energy Physics::Phenomenology, FOS: Physical sciences, Weinberg angle, HERA, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Isospin, 0103 physical sciences, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics, Charged current
Abstract

Using the deep inelastic e+p and e-p charged and neutral current scattering cross sections previously published, a combined electroweak and QCD analysis is performed to determine electroweak parameters accounting for their correlation with parton distributions. The data used have been collected by the H1 experiment in 1994-2000 and correspond to an integrated luminosity of 117.2 pb-1. A measurement is obtained of the W propagator mass in charged current ep scattering. The weak mixing angle sin 2θW is determined in the on-mass-shell renormalisation scheme. A first measurement at HERA is made of the light quark weak couplings to the Z0 boson and a possible contribution of right-handed isospin components to the weak couplings is investigated. © 2005 Elsevier B.V. All rights reserved., 0, DESY-05-093 / hep-ex/0507080, SCOPUS: ar.j, H1 Collaboration., info:eu-repo/semantics/published

Published
2005

8. The H1 Neural Network Trigger

Author

C. Kiesling, L. Janauschek, R. Placakyte, J. Zimmermann, and B. Vujicic

Subjects
Artificial neural network, business.industry, Computer science, Pattern recognition (psychology), Artificial intelligence, HERA, business
Abstract

High energy physics experiments require high-speed triggering systems capable of performing complex pattern recognition at rates of tens of megahertz. Neural networks implemented in hardware have been the solution of choice for certain experiments. The neural triggering problem is presented here via a detailed look at the H1 level-2 trigger at the HERA accelerator in Hamburg, Germany.

Published
2005

9. Measurement of Dijet Cross Sections in ep Interactions with a Leading Neutron at HERA

Author

V. Andreev, Peter Robmann, Yves Sirois, Magnus Hansson, Dirk L. Hoffmann, J. C. Bizot, G. Franke, C. Risler, S. Backovic, E. Wünsch, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, Dave Sankey, H. Lueders, F. Eisele, R. Oganezov, K. Sedlák, J. E. Olsson, W. Bartel, Fabian Zomer, Dusan Bruncko, C. Gwilliam, S. Levonian, B. Naroska, G. D. Patel, H. Meyer, Malte Hildebrandt, Laurent Schoeffel, S. Schmidt, Wolfram Erdmann, D.P. Johnson, A. M. Fomenko, Paul Laycock, E. Malinovski, Pierre Marage, A. Makankine, T. Greenshaw, G. Buschhorn, D. Ozerov, R. Weber, Emmanuel Sauvan, B. Vujicic, F. W. Büsser, N. Malden, G. Grindhammer, Erika Garutti, C. Gerlich, I. Foresti, G. Cozzika, N. Werner, Matthew Beckingham, Anna Kropivnitskaya, A. DeRoeck, R. Felst, P. Baranov, I. R. Kenyon, J. Ferencei, M. Martisikova, J. Naumann, L. Finke, Stefan Valkar, Natasa Raicevic, C. Wigmore, David South, F. Salvaire, D. Haidt, K. Daum, I. Glushkov, Wolfgang Lange, I. Milcewicz-Mika, J. Gayler, John A Coughlan, S. Ghazaryan, Vincent Boudry, F. Tomasz, Claus Kleinwort, A. N. Morozov, G. Knies, Leif J. Jönsson, Benoit Roland, K. Krüger, A. Nikiforov, D. Perez-Astudillo, M. Gregori, C. Goyon, Eram Rizvi, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, B. Stella, T. Klimkovich, Th. Naumann, M. Peez, G. Heinzelmann, V. Dodonov, Sergey Rusakov, P. Truöl, T. Frisson, I. Strauch, Philipp Fleischmann, R. Pöschl, R. Marshall, Zhen Zhang, S. Caron, Ricardo Lopez-Fernandez, Murrough Landon, S. Baumgartner, S. Gorbounov, O. Behnke, V. Chekelian, J. V. Morris, Andreas Meyer, D.K. Nikitin, E. Gabathuler, O. Henshaw, A. Bunyatyan, P. Van Mechelen, A. Usik, Klaus Desch, R. D. Heuer, G. Frising, A. Rimmer, C. Wissing, A. Knutsson, D. Wegener, Thorsten Lux, L. Janauschek, N. Van Remortel, V. Efremenko, S. Mikocki, M. Jacquet, E. E. Elsen, V. Lubimov, A. Dubak, M. Goettlich, K. Nankov, L. N. Shtarkov, J. Formánek, Stephen Maxfield, Sakar Osman, J. Stiewe, J. Scheins, I. Sheviakov, S. Schmitt, Adrian Perieanu, C. Veelken, Andrew Mehta, J. Bracinik, W.D. Dau, J. B. Dainton, N. Gogitidze, B. Portheault, Gerhard Brandt, Daniel Pitzl, B. Leißner, D. Meer, J. Zálešák, D. Traynor, V. Volchinski, V. Spaskov, Judith Katzy, F. Cassol-Brunner, R. Demirchyan, A. Asmone, J. Kückens, K. Wacker, L. Hajduk, Y.H. Fleming, Xavier Janssen, Max Klein, W. Yan, Georgios Tsipolitis, M. Fleischer, N. Loktionova, M. Urban, A. Hovhannisyan, K. Krastev, R. Plačakyte, I. Tsurin, E. Lobodzinska, Bogdan Povh, L. Lindfeld, F. Sefkow, M. Ismail, David Milstead, T. Kluge, Jan Kretzschmar, P. A. Smirnov, M. Wessels, Guenter Eckerlin, André Schöning, M. Ellerbrock, L. Goerlich, B. Delcourt, H. U. Martyn, G. Herrera, Bradley Cox, R. Wolf, B. Wessling, M.-O. Boenig, Matthias Ulrich Mozer, A. Fedotov, T. Laštovička, Nicolas Berger, P. D. Thompson, A. Vest, S. Ginzburgskaya, O. Behrendt, S. Vinokurova, A. Zhelezov, S. Baudrand, V. Yeganov, J. Zimmermann, J-P. Meyer, C. Kiesling, P. Kostka, E. Barrelet, E. Tzamariudaki, A. J. Campbell, D.P. Brown, J. Haller, L. Bystritskaya, J. Turnau, S. Mangano, Z. Rurikova, V. Jemanov, I. Tsakov, Roland Horisberger, A. Valkárová, H. Zohrabyan, Ch. Berger, F. Moreau, Karlheinz Meier, R. Roosen, Martin Karlsson, S. J. Aplin, K. Müller, C. Pascaud, Christian Schwanenberger, I. Herynek, L. Lytkin, Cristinel Diaconu, Y. Vazdik, D. Lüke, B. List, Stefania Xella, A. Aktas, S. Essenov, Katerina Lipka, J. Wagner, J. Cvach, V. Tchoulakov, R. Koutouev, A. Petrukhin, V. Brisson, A. D.R. Vargas Trevino, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, Pavel Murin, M. Ibbotson, Karel Cerny, E. Perez, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, B. Olivier, Laurent Favart, T. Anthonis, R. Gerhards, P. E. Reimer, G. G. Winter, A. Glazov, Gero Flucke, M. Kapichine, M. Nozicka, E. A. DeWolf, S. Schätzel, A. Baghdasaryan, A. Rostovtsev, N. Keller, G. Nowak, G. Thompson, V. Lendermann, V. Schröder, H. Henschel, D. Utkin, J. Bähr, C. Niebuhr, S. Egli, Y. Soloviev, Paul Newman, F. P. Schilling, Christoph Grab, A.-I. Lucaci-Timoce, K. H. Hiller, R. C. W. Henderson, G. Weber, U. Straumann, A. Specka, V. Korbel, Alexandre Lebedev, C. Werner, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and H1 Collaboration

Subjects
Particle physics, Physics and Astronomy (miscellaneous), Nuclear Theory, FOS: Physical sciences, Virtual particle, Parton, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutron, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Perturbative QCD, HERA, Deep inelastic scattering, 3. Good health, High Energy Physics::Experiment
Abstract

Measurements are reported of the production of dijet events with a leading neutron in ep interactions at HERA. Differential cross sections for photoproduction and deep inelastic scattering are presented as a function of several kinematic variables. Leading order QCD simulation programs are compared with the measurements. Models in which the real or virtual photon interacts with a parton of an exchanged pion are able to describe the data. Next-to-leading order perturbative QCD calculations based on pion exchange are found to be in good agreement with the measured cross sections. The fraction of leading neutron dijet events with respect to all dijet events is also determined. The dijet events with a leading neutron have a lower fraction of resolved photon processes than do the inclusive dijet data., 27 pages, 9 figures, 5 tables

Published
2005

10. Measurement of beauty production at HERA using events with muons and jets

Author

C. Risler, C. Gwilliam, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, M.-O. Boenig, R. Koutouev, A. Petrukhin, V. Jemanov, Zhen Zhang, Ricardo Lopez-Fernandez, S. Baumgartner, Andreas Meyer, A. Usik, H. U. Martyn, Matthias Klein, Nicolas Berger, G. Frising, D.P. Brown, J. Haller, Søren Schmidt, Dusan Bruncko, Georgios Tsipolitis, M. Fleischer, P. E. Reimer, Roland Horisberger, W. Yan, R. Plačakyte, A. Zhelezov, S. Baudrand, Adrian Perieanu, Michael R. Wessels, V. Brisson, S. Levonian, A. Valkárová, P. D. Thompson, B. Naroska, Judith Katzy, A. Asmone, Y.H. Fleming, V. Yeganov, G. G. Winter, M. Ismail, David Milstead, P. A. Smirnov, N. Loktionova, B. List, E. Lobodzinska, A. Aktas, Bogdan Povh, F. Sefkow, D. Wegener, S. Mangano, B. Portheault, F. Moreau, S. J. Aplin, J. Cvach, F. Eisele, T. Greenshaw, Erika Garutti, T. Frisson, I. Strauch, J. Kroseberg, Philipp Fleischmann, Pavel Murin, A. Hovhannisyan, Gerhard Brandt, V. Volchinski, A. Dubak, R. Oganezov, K. Sedlák, V. Korbel, Martin Karlsson, Daniel Pitzl, R. Demirchyan, F. Cassol-Brunner, D. Traynor, Murrough Landon, Wolfgang Lange, M. Ibbotson, I. Tsurin, Gero Flucke, M. Kapichine, M. Nozicka, Xavier Janssen, A. M. Fomenko, K. Krastev, J. Ferencei, M. Martisikova, J. Naumann, T. Laštovička, B. Stella, B. Wessling, C. Wissing, J. Gayler, S. Gorbounov, C. Gerlich, B. Olivier, Laurent Favart, David South, T. Anthonis, Laurent Schoeffel, V. Efremenko, J-P. Meyer, L. Lindfeld, J. E. Olsson, Paul Laycock, E. Malinovski, Emmanuel Sauvan, W. Bartel, C. Wigmore, L. Hajduk, J. Žáček, Malte Hildebrandt, F. W. Büsser, I. Milcewicz-Mika, B. Vujicic, Katerina Lipka, A. Vest, V. Tchoulakov, Claus Kleinwort, E. Barrelet, S. Mikocki, P. Baranov, O. Behrendt, S. Vinokurova, Y. Vazdik, P. Van Mechelen, D. Lüke, A. Nikiforov, Hans-Christian Schultz-Coulon, P. Kostka, M. Urban, I. R. Kenyon, S. Schätzel, Theodora Papadopoulou, G. Grindhammer, Peter Robmann, Natasa Raicevic, Vladimir Palichik, S. Essenov, K. H. Hiller, Stefania Xella, V. Cerny, T. Kluge, Z. Rurikova, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, K. Krüger, Alexandre Lebedev, L. Finke, Vincent Boudry, Fabian Zomer, R. C. W. Henderson, V. Lubimov, C. Werner, A. D.R. Vargas Trevino, N. Werner, V. Chekelian, Thorsten Lux, K. Müller, E. Gabathuler, A. N. Morozov, T. J. Sloan, P.J.W. Faulkner, D. Perez-Astudillo, M. Gregori, A.S. Belousov, L. Janauschek, N. Van Remortel, Jan Kretzschmar, J. Turnau, Sergey Rusakov, R. Eichler, I. Foresti, Y. de Boer, G. Cozzika, K. Daum, Christian Schwanenberger, Stephen Maxfield, F. Tomasz, P. Truöl, Magnus Hansson, M. Jacquet, A. Baghdasaryan, A. Rostovtsev, J. Stiewe, Andrew Mehta, J. Bracinik, G. Knies, E. E. Elsen, Guenter Eckerlin, M. Goettlich, Stefan Valkar, André Schöning, I. Herynek, N. Gogitidze, V. Andreev, L. Goerlich, Paul Newman, Pierre Marage, S. Backovic, K. Nankov, W.D. Dau, J. B. Dainton, B. Leißner, E. Perez, R. Marshall, C. Schmitz, J. Formánek, I. Sheviakov, S. Schmitt, Hannes Jung, Alexander Zhokin, N. Keller, D. Utkin, G. Nowak, L. N. Shtarkov, John A Coughlan, I. Tsakov, B. Delcourt, A. Specka, R. Gerhards, V. Lendermann, J. Bähr, V. Schröder, C. Niebuhr, H. Lueders, Matthias Ulrich Mozer, M. Ellerbrock, Yves Sirois, J. Becker, G. Herrera, I. Glushkov, A. Fedotov, S. Egli, Bradley Cox, R. Wolf, A.-I. Lucaci-Timoce, S. Ginzburgskaya, J. Zimmermann, J. Zálešák, Y. Soloviev, C. Kiesling, V. Spaskov, Dirk L. Hoffmann, J. C. Bizot, G. Franke, A. De Roeck, F. P. Schilling, E. Tzamariudaki, A. J. Campbell, G. Weber, J. Kückens, K. Wacker, Christoph Grab, L. Bystritskaya, U. Straumann, A. Makankine, Matthew Beckingham, Thomas Naumann, Sakar Osman, Anna Kropivnitskaya, R. Felst, H. Zohrabyan, G. Buschhorn, C. Veelken, D. Ozerov, R. Weber, J. Wagner, S. Caron, D. Meer, O. Behnke, G. Thompson, D.K. Nikitin, O. Henshaw, Karel Cerny, H. Henschel, Wolfram Erdmann, A. Glazov, C. Pascaud, L. Lytkin, Cristinel Diaconu, S. Ghazaryan, Klaus Desch, A. Rimmer, A. Knutsson, C. Vallée, F. Salvaire, D. Haidt, C. Goyon, Eram Rizvi, G. Heinzelmann, V. Dodonov, Leif J. Jönsson, Benoit Roland, T. Klimkovich, M. Peez, E. Wünsch, Dave Sankey, G. D. Patel, H. Meyer, D.P. Johnson, N. Malden, J. V. Morris, A. Bunyatyan, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration

Subjects
Quark, Particle physics, Photon, Physics and Astronomy (miscellaneous), Hadron, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics, Collider, Engineering (miscellaneous), Physics, Muon, 010308 nuclear & particles physics, Perturbative QCD, HERA, Deep inelastic scattering, High Energy Physics::Experiment
Abstract

A measurement of the beauty production cross section in ep collisions at a centre-of-mass energy of 319 GeV is presented. The data were collected with the H1 detector at the HERA collider in the years 1999-2000. Events are selected by requiring the presence of jets and muons in the final state. Both the long lifetime and the large mass of b-flavoured hadrons are exploited to identify events containing beauty quarks. Differential cross sections are measured in photoproduction, with photon virtualities Q^2 < 1 GeV^2, and in deep inelastic scattering, where 2 < Q^2 < 100 GeV^2. The results are compared with perturbative QCD calculations to leading and next-to-leading order. The predictions are found to be somewhat lower than the data., 33 pages, 11 figures, 6 tables

Published
2005

11. Measurement of Charm and Beauty Photoproduction at HERA using D* mu Correlations

Author

C. Niebuhr, S. Egli, Y. Soloviev, Georgios Tsipolitis, M. Fleischer, F. P. Schilling, Christoph Grab, A. Makankine, G. Buschhorn, Bogdan Povh, F. Sefkow, D. Ozerov, T. Laštovička, A. Vest, John A Coughlan, O. Behrendt, S. Vinokurova, E. Barrelet, Z. Rurikova, Adrian Perieanu, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, P. Kostka, Paul Laycock, E. Malinovski, Emmanuel Sauvan, J. Turnau, G. Grindhammer, I. Foresti, A. Baghdasaryan, A. Rostovtsev, B. Stella, J. Žáček, T. Kluge, Gerhard Brandt, K. Krastev, G. Cozzika, V. Volchinski, N. Werner, I. Tsakov, B. Wessling, H. U. Martyn, Matthias Klein, T. Frisson, L. Lindfeld, H. Meyer, R. Demirchyan, Vladimir Palichik, I. Strauch, Roland Horisberger, Philipp Fleischmann, A. Valkárová, D. Wegener, I. R. Kenyon, Stefan Valkar, V. Lubimov, C. Pascaud, B. Olivier, C. Schmitz, Hannes Jung, Alexander Zhokin, V. Efremenko, Xavier Janssen, S. Mikocki, Guenter Eckerlin, A. Dubak, Peter Robmann, M. Goettlich, J. Formánek, Hans-Christian Schultz-Coulon, Martin Karlsson, V. Yeganov, J. Becker, C. Vallée, D. Utkin, J. Bähr, B. Vujicic, Magnus Hansson, Paul Richard Newman, Grzegorz Nowak, Zhen Zhang, K. Nankov, Ricardo Lopez-Fernandez, P. E. Reimer, Klaus Desch, F. Moreau, S. J. Aplin, L. N. Shtarkov, A. Rimmer, D. Hoffmann, Andreas Meyer, D. Meer, S. Backovic, R. Koutouev, A. Petrukhin, J-P. Meyer, P. Baranov, R. Weber, G. G. Winter, Gero Flucke, A. Knutsson, A. Usik, Sakar Osman, S. Baumgartner, L. Goerlich, V. Chekelian, G. Frising, H. Lueders, M. Kapichine, M. Nozicka, C. Veelken, S. Baudrand, A. Nikiforov, B. Delcourt, Wolfgang Lange, Ewelina Lobodzinska, Matthew Beckingham, S. Essenov, A. M. Fomenko, J. E. Olsson, Leif J. Jönsson, V. Cerny, A. Falkewicz, W. Bartel, V. Jemanov, Benoit Roland, Matthias Ulrich Mozer, S. Levonian, S. Schätzel, J. Gayler, C. Gerlich, Anna Kropivnitskaya, R. Felst, K. H. Hiller, R. C. W. Henderson, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Malte Hildebrandt, Sergey Rusakov, P. Truöl, A. Fedotov, T. Klimkovich, F. W. Büsser, M. Peez, S. Ginzburgskaya, C. Kiesling, W. Yan, R. Marshall, A. De Roeck, E. Tzamariudaki, A. J. Campbell, G. Thompson, D.P. Brown, J. Haller, N. Loktionova, R. Eichler, Michael R. Wessels, David South, V. Brisson, Theodora Papadopoulou, M.-O. Boenig, A. Specka, A. Hovhannisyan, Søren Schmidt, S. Mangano, K. Krüger, Natasa Raicevic, H. Henschel, I. Sheviakov, S. Schmitt, Th. Naumann, I. Tsurin, B. Portheault, Nicolas Berger, E. Gabathuler, J.C. Bizot, E. E. Elsen, K. Müller, C. Wigmore, Vincent Boudry, A. Zhelezov, A. Schöning, A. D.R. Vargas Trevino, Emmanuelle Perez, Christian Schwanenberger, A. Aktas, J. Zimmermann, Y. Vazdik, A. N. Morozov, P.D. Thompson, Stefania Xella, Stephen Maxfield, D. Perez-Astudillo, C. Risler, M. Gregori, J. Zálešák, V. Spaskov, R. Gerhards, J. Stiewe, F. Zomer, J. Kückens, K. Wacker, Dusan Bruncko, B. Naroska, Andrew Mehta, J. Bracinik, T. Greenshaw, Erika Garutti, J. Ferencei, M. Martisikova, J. Naumann, Katerina Lipka, Claus Kleinwort, N. Gogitidze, V. Tchoulakov, L. Bystritskaya, V. Andreev, H. Zohrabyan, C. Gwilliam, R. Plačakytė, A. Astvatsatourov, M. Ellerbrock, N. Keller, G. Herrera, Bradley Cox, Yves Sirois, V. Lendermann, V. Schröder, R. Wolf, A.-I. Lucaci-Timoce, G. Franke, F. Eisele, Judith Katzy, R. Oganezov, K. Sedlák, Y.H. Fleming, J. Cvach, C. Goyon, J. Wagner, Karel Cerny, A. Glazov, G. Weber, U. Straumann, V. Korbel, C. Werner, W.D. Dau, J. B. Dainton, B. Leißner, M. Ismail, David Milstead, P. A. Smirnov, O. Henshaw, L. Finke, K. Daum, F. Tomasz, G. Knies, M. Jacquet, I. Milcewicz-Mika, Anton Babaev, J. G. Contreras, Laurent Schoeffel, A. Mohamed, P. Prideaux, Murrough Landon, Pavel Murin, S. Gorbounov, M. Ibbotson, Wolfram Erdmann, B. List, P. Van Mechelen, Laurent Favart, T. Anthonis, J. V. Morris, A. Bunyatyan, D. Lüke, E. Wünsch, Dave Sankey, G. D. Patel, D.P. Johnson, N. Malden, A. Lebedev, F. Salvaire, D. Haidt, Daniel Pitzl, D. Traynor, A. Asmone, S. Ghazaryan, Eram Rizvi, G. Heinzelmann, F. Cassol-Brunner, V. Dodonov, L. Hajduk, M. Urban, C. Wissing, Jan Kretzschmar, L. Lytkin, Cristinel Diaconu, Thorsten Lux, L. Janauschek, N. Van Remortel, S. Caron, D.K. Nikitin, Pierre Marage, I. Glushkov, O. Behnke, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and H1 Collaboration

Subjects
Nuclear and High Energy Physics, Particle physics, Meson, Proton, High Energy Physics::Lattice, Nuclear Theory, FOS: Physical sciences, 01 natural sciences, law.invention, High Energy Physics - Experiment, Nuclear physics, Cross section (physics), High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Charm (quantum number), 010306 general physics, Collider, Nuclear Experiment, Physics, Quantum chromodynamics, Muon, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract

A measurement of charm and beauty photoproduction at the electron proton collider HERA is presented based on the simultaneous detection of a D*± meson and a muon. The correlation between the D* meson and the muon serves to separate the charm and beauty contributions and the analysis provides comparable sensitivity to both. The total and differential experimental cross sections are compared to LO and NLO QCD calculations. The measured charm cross section is in good agreement with QCD predictions including higher order effects while the beauty cross section is higher. © 2005 Elsevier B.V. All rights reserved., 0, DESY-05-040 / hep-ex/0503038, H1 Collaboration., info:eu-repo/semantics/published

Published
2005
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12. A Direct Search for Stable Magnetic Monopoles Produced in Positron-Proton Collisions at HERA

Author

A. Vest, O. Behrendt, S. Vinokurova, W. Yan, P. Kostka, N. Loktionova, A. Hovhannisyan, J. Turnau, Judith Katzy, I. Tsurin, A. Asmone, Y.H. Fleming, J. Scheins, W.D. Dau, J. B. Dainton, B. Leißner, I. Tsakov, Dusan Bruncko, B. Naroska, M.-O. Boenig, B. Wessling, I. Milcewicz-Mika, M. Jacquet, E. E. Elsen, T. Greenshaw, Erika Garutti, J. E. Olsson, W. Bartel, C. Wissing, J. Ferencei, M. Martisikova, J. Naumann, Malte Hildebrandt, Nicolas Berger, Georgios Tsipolitis, Claus Kleinwort, A. Baghdasaryan, A. Rostovtsev, Max Klein, C. Goyon, I. Sheviakov, S. Schmitt, M. Fleischer, F. Eisele, L. Finke, R. Plačakyte, F. W. Büsser, C. Risler, J. Zimmermann, M. Ismail, David Milstead, P. A. Smirnov, Thorsten Lux, L. Janauschek, N. Van Remortel, R. Oganezov, K. Sedlák, R. Koutouev, A. Petrukhin, V. Korbel, E. Lobodzinska, Bogdan Povh, C. Pascaud, I. R. Kenyon, J. Zálešák, V. Spaskov, A. Zhelezov, Paul Laycock, S. Baudrand, B. Stella, E. Malinovski, Adrian Perieanu, F. Sefkow, L. Lytkin, B. Vujicic, Cristinel Diaconu, C. Gwilliam, Gero Flucke, K. Daum, Natasa Raicevic, J. Kückens, K. Wacker, D. Utkin, Emmanuel Sauvan, Pierre Marage, G. Grindhammer, K. Müller, Christian Schwanenberger, B. Portheault, Vincent Boudry, Th. Naumann, Gerhard Brandt, E. Wünsch, P. Baranov, Sakar Osman, H. U. Martyn, M. Kapichine, M. Nozicka, A. M. Fomenko, I. Glushkov, J. Bähr, V. Volchinski, Dave Sankey, F. Tomasz, R. Demirchyan, L. Bystritskaya, G. Knies, C. Gerlich, Leif J. Jönsson, N. Werner, Benoit Roland, Xavier Janssen, V. Chekelian, Magnus Hansson, Alexandre Lebedev, C. Niebuhr, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, C. Wigmore, Sergey Rusakov, Wolfram Erdmann, P. Truöl, D.P. Brown, J. Haller, E. Gabathuler, C. Veelken, O. Behnke, V. Brisson, G. D. Patel, H. Meyer, C. Werner, T. Klimkovich, S. Egli, J. Cvach, M. Peez, A. N. Morozov, D. Perez-Astudillo, M. Gregori, H. Zohrabyan, V. Andreev, Daniel Pitzl, Katerina Lipka, D.P. Johnson, F. Cassol-Brunner, D. Traynor, Y. Soloviev, T. Laštovička, N. Malden, T. Kluge, L. Hajduk, F. P. Schilling, D. Meer, Stephen Maxfield, J. Wagner, E. Barrelet, S. Ghazaryan, C. Vallée, J. Stiewe, Z. Rurikova, M. Urban, Yves Sirois, N. Keller, Zhen Zhang, Ricardo Lopez-Fernandez, V. Tchoulakov, Andrew Mehta, J. Bracinik, E. A. De Wolf, Ch. Berger, S. Baumgartner, Anton Babaev, J. G. Contreras, G. Nowak, F. Salvaire, D. Haidt, Karel Cerny, K. H. Hiller, Guenter Eckerlin, André Schöning, N. Gogitidze, R. Roosen, L. Goerlich, Jan Kretzschmar, Dirk L. Hoffmann, J. C. Bizot, S. Schätzel, Christoph Grab, V. Lendermann, V. Schröder, R. C. W. Henderson, G. Franke, B. Delcourt, A. Mohamed, Laurent Schoeffel, J. Žáček, Eram Rizvi, S. Schmidt, Andreas Meyer, S. Caron, A. Usik, G. Heinzelmann, V. Dodonov, Y. Vazdik, I. Herynek, D. Lüke, M. Wessels, Hans-Christian Schultz-Coulon, M. Ellerbrock, A.-I. Lucaci-Timoce, Roland Horisberger, A. Valkárová, P. Prideaux, G. Herrera, Bradley Cox, V. Lubimov, Fabian Zomer, D.K. Nikitin, Stefania Xella, R. Wolf, Murrough Landon, Matthew Beckingham, G. Frising, A. Glazov, O. Henshaw, Paul Newman, J. V. Morris, R. Eichler, Anna Kropivnitskaya, R. Felst, S. Gorbounov, A. Bunyatyan, Matthias Ulrich Mozer, A. Fedotov, V. Jemanov, John A Coughlan, S. Ginzburgskaya, P. Van Mechelen, C. Kiesling, I. Foresti, G. Cozzika, A. De Roeck, E. Tzamariudaki, A. J. Campbell, R. D. Heuer, Pavel Murin, A. Specka, Martin Karlsson, A. Dubak, G. Weber, U. Straumann, M. Ibbotson, K. Krastev, L. Lindfeld, Stefan Valkar, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, K. Nankov, L. N. Shtarkov, B. List, A. Aktas, B. Olivier, G. Thompson, Laurent Favart, T. Anthonis, H. Henschel, S. Levonian, A. Nikiforov, David South, K. Krüger, R. Pöschl, R. Marshall, Klaus Desch, A. Rimmer, A. Knutsson, K. Meier, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, D. Wegener, V. Efremenko, S. Mikocki, P. E. Reimer, G. G. Winter, M. Goettlich, J. Formánek, A. D.R. Vargas Trevino, P. D. Thompson, V. Yeganov, S. Mangano, F. Moreau, S. J. Aplin, S. Essenov, E. Perez, R. Gerhards, Wolfgang Lange, J. Gayler, Peter Robmann, S. Backovic, H. Lueders, T. Frisson, I. Strauch, Philipp Fleischmann, J-P. Meyer, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration

Subjects
Particle physics, Physics and Astronomy (miscellaneous), Proton, Magnetometer, Magnetic monopole, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Positron, law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Engineering (miscellaneous), Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, HERA, 3. Good health, MoEDAL experiment, High Energy Physics::Experiment, Beam (structure)
Abstract

A direct search has been made for magnetic monopoles produced in e^+ p collisions at a centre of mass energy of 300 GeV at HERA. The beam pipe surrounding the interaction region in 1995-1997 was investigated using a SQUID magnetometer to look for stopped magnetic monopoles. During this time an integrated luminosity of 62 pb^{-1} was delivered. No magnetic monopoles were observed and charge and mass dependent upper limits on the e^+ p production cross section are set., 23 pages, 11 figures, 1 table

Published
2005

13. Exact solution of the one-dimensional Potts bridge model with competing interactions

Author

M. Mijatovic, B. Vujicic, and D. Hajdukovic

Subjects
Physics, Exact solutions in general relativity, Specific heat, Ferromagnetism, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Statistical physics, Condensed Matter Physics, Potts model
Abstract

The exact solution of the q-state Potts bridge model with competing ferromagnetic and antiferromagnetic interactions is obtained and corresponding regular and critical behaviour studied.

Published
1988

14. Analyse and research of nonmetallic inclusions for steel 100Cr6

Author

I. Vitez, M. Oruč, A. Gigović-Gekić, and B. Vujičić

Subjects
steel 100Cr6, nonmetallic inclusions, optical and scanning electronic microscope, vacuum and induction electric furnace, Mining engineering. Metallurgy, TN1-997
Abstract

Steel 100Cr6 belongs to a group of hardened steels, which are applicable for production of rolling element parts. Because of specific working conditions, a proper chemical composition is required with a minimum content of nonmetallic inclusion. In this paper, the research results of presence the nonmetallic inclusions and their chemical composition are presented for the steel produced in vacuum and open induction electric furnace and their influence on the prescribed properties for this steel. The optical and scanning electronic microscope are used to identify presence and the chemical compositions of nonmetallic inclusions.

Published
2009

15. Prediction of traffic in a public safety network

Author

Ljiljana Trajkovic, Hao Chen, and B. Vujicic

Subjects
Engineering, business.industry, Public safety network, Quality of service, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Aggregate (data warehouse), computer.software_genre, Traffic prediction, Network traffic simulation, Traffic classification, Statistical analysis, Data mining, business, computer, Traffic generation model
Abstract

Traditional statistical analysis and mining of network data are often employed to determine traffic distribution, to summarize a user's behavior patterns, or to predict future network traffic. We analyze three months of network log data from a deployed public safety trunked radio network. After data cleaning and traffic extraction, we apply the K-means algorithm and identify that three clusters of talk groups best reflect users' behavior patterns represented by the hourly number of calls. We propose a traffic prediction model by applying the classical SARIMA models on clusters of users. The predicted network traffic agrees with the collected traffic data and the proposed cluster-based prediction approach performs well compared to the prediction based on the aggregate traffic.

17. Comparison of Autologous and Allogeneic Adipose-Derived Stem Cells in Kidney Transplantation: Immunological Considerations and Therapeutic Efficacy.

Author

Fodor Duric L, Basic Jukic N, and Vujicic B

Abstract

Regenerative medicine shows significant potential in treating kidney diseases through the application of various types of stem and progenitor cells, including mesenchymal stem cells (MSCs), renal stem/progenitor cells, embryonic stem cells (ESCs), and induced pluripotent stem cells (iPSCs). Stem cells possess the unique ability to repair injured organs and improve impaired functions, making them a key element in the research of therapies for kidney tissue repair and organ regeneration. In kidney transplantation, reperfusion injury can cause tissue destruction, leading to an initially low glomerular filtration rate and long-term impact on function by creating irreversible interstitial fibrosis. MSCs have proven useful in repairing early tissue injury in animal models of kidney, lung, heart, and intestine transplantation. The use of stem cell therapies in solid organ transplantation raises the question of whether autologous or allogeneic cells should be preferred. Adipose-derived stem cells (ASCs), characterized by the lack of HLA Class II molecules and low expression of HLA Class I and co-stimulatory signals, are considered immune-privileged. However, the actual risk of graft rejection associated with allogeneic ASCs remains unclear. It has been demonstrated that donor-derived ASCs can promote the development of Treg cells in vitro, and some degree of tolerance induction has been observed in vivo. Nevertheless, a study comparing the efficacy of autologous and allogeneic ASCs in a rat model with a total MHC mismatch for kidney transplantation showed that donor-derived administration of ASCs did not improve the grafts' survival and was associated with increased mortality through an immunologically mediated mechanism. Given the lack of data, autologous ASCs appear to be a safer option in this research context. The aim of this review was to examine the differences between autologous and allogeneic ASCs in the context of their application in kidney transplantation therapies, considering potential immune reactions and therapeutic efficacy. Some have argued that ASCs harvested from end-stage renal disease (ESRD) patients may have lower regenerative potential due to the toxic effects of uremia, potentially limiting their use in transplantation settings. However, evidence suggests that the beneficial properties of ASCs are not affected by uremia or dialysis. Indeed, some investigators have demonstrated that ASCs harvested from chronic kidney disease (CKD) patients exhibit normal characteristics and function, maintaining consistent proliferative capacity and genetic stability over time, even after prolonged exposure to uremic serum Furthermore, no differences were observed in the response of ASCs to immune activation or their inhibitory effect on the proliferation of alloantigen-activated peripheral blood mononuclear cells between patients with normal or impaired renal function. This review presents the current achievements in stem cell research aimed at treating kidney diseases, highlighting significant progress and ongoing efforts in the development of stem cell-based therapies. Despite the encouraging results, further research is needed to overcome the current limitations and fully realize the potential of these innovative treatments. Advances in this field are crucial for developing effective therapies that can address the complex challenges associated with kidney damage and failure.

Published
2024
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18. Association of multiple retinal nodular hamartomas and "confetti" skin lesions with end-stage renal disease in patients with tuberous sclerosis.

Author

Prelevic V, Juric I, Bevc S, Marcun-Varda N, Aleckovic-Halilovic M, Mesic E, Bilic H, Grujicic M, Zabic I, Josipovic J, Vujicic B, Marinaki S, Simic-Ogrizovic S, Milinkovic M, Azasevac T, Idrizi A, Arnol M, Radunovic D, Antunovic T, and Jukic NB

Subjects
Humans, Female, Adolescent, Young Adult, Adult, Middle Aged, MTOR Inhibitors, Retrospective Studies, Tuberous Sclerosis complications, Tuberous Sclerosis epidemiology, Hamartoma complications, Kidney Failure, Chronic etiology, Kidney Failure, Chronic complications, Angiomyolipoma complications, Angiomyolipoma pathology, Skin Diseases, Renal Insufficiency, Chronic complications, Renal Insufficiency, Chronic epidemiology
Abstract

Purpose: The main purpose of this study is to explore characteristics of patients with chronic kidney disease in tuberous sclerosis (TSC) and to underline differences in clinical characteristics between end-stage renal disease (ESRD) patients and patients in earlier stages of chronic kidney disease., Methods: This multicentric, retrospective study included data for 48 patients from seven South-Eastern European countries (Albania, Bosnia and Herzegovina, Croatia, Greece, Montenegro, Serbia, Slovenia) in the period from February to August 2020. Researchers collected data from local and national nephrological and neurological registries and offered clinical and laboratory results from medical histories in follow-up periods., Results: This study enrolled 48 patients with a median age of 32.3 years (range, 18-46 years), and predominant female gender (60.45%). The percentage of patients with chronic kidney disease (CKD) diagnosis of the total number of patients was 66.90%, with end-stage renal disease development in 39.6%. The most prevalent renal lesions leading to chronic kidney disease were angiomyolipomas (AMLs) in 76.6%, while multiple renal cysts were present in 42.6% of patients. Nephrectomy was performed in 43% of patients, while the mTOR inhibitors were used in 18 patients (37.5%). The majority of patients had cutaneous manifestations of tuberous sclerosis-83.30% had hypomelanotic cutaneous lesions, and 68.80% had angiofibromas. Multiple retinal nodular hamartomas and "confetti" skin lesions were more frequent in end-stage renal disease (ESRD) than in patients with earlier stages of chronic kidney disease (p-0.033 and 0.03, respectively)., Conclusion: Our study has also shown that retinal hamartomas and "confetti" skin lesions are more frequent in end-stage renal diseases (ESRD) patients than in other chronic kidney disease (CKD) patients. Usage of mTOR inhibitors can also reduce the number of complications and associated with tuberous sclerosis, such as dermatological manifestations and retinal hamartoma, which are more common in the terminal stage of chronic kidney disease., (© 2022. The Author(s), under exclusive licence to Springer Nature B.V.)

Published
2023
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19. Comparison of clinical assessment and multifrequency bioimpedance analysis as methods of estimating volume status in peritoneal dialysis patients - A single-center experience
.

Author

Vujicic B, Dorcic G, Babic V, Rundic A, Devcic B, Simac DV, Zaputovic L, and Racki S

Subjects
Adult, Aged, Blood Pressure, Body Composition, Female, Humans, Male, Middle Aged, Prospective Studies, Sensitivity and Specificity, Young Adult, Blood Volume, Electric Impedance, Kidney Diseases physiopathology, Kidney Diseases therapy, Peritoneal Dialysis adverse effects, Symptom Assessment
Abstract

Introduction: Clinical assessment (CA) is frequently used for the evaluation of volume status in peritoneal dialysis (PD) patients despite its subjectivity. Multiple-frequency bioelectrical impedance analysis (MF-BIA) is objective, accurate, and quick, proving to be a promising technique for measuring volume status. The aim of this study was to assess volume status in PD patients using CA and MF-BIA and to compare results., Materials and Methods: Incident PD patients were prospectively analyzed between January 1, 2014, and January 1, 2016, at the Clinical Hospital Center of -Rijeka, Croatia. Volume status measurements were performed once a month for 6 consecutive months. The presence of symptoms and signs associated with hyper- or hypovolemia were detected by CA. Euvolemia was defined as a symptom-free state or up to 2 symptoms maximum. Patients lacking up to 1.2 L of volume or with up to 1.2 L in excess were considered euvolemic, as measured by MF-BIA., Results: A total of 45 PD patients were analyzed; 51% were men, 27% were diabetic, the mean age was 52 ± 26 years, and PD duration was 11.5 ± 6.5 months. In comparison to MF-BIA, CA showed a significant difference in detected hypervolemia between baseline and follow-up (p = 0.708 vs. p = 0.01, respectively) and among all measurements (p < 0.01). Contrary to CA, volume status measured by MF-BIA correlated significantly with systolic and diastolic blood pressure (R = 0.29; p ≤ 0.01 and R = 0.26; p ≤ 0.01, respectively). CA showed low sensitivity (0.24) and high specificity (0.92) in detecting hypervolemia., Conclusion: MF-BIA is an effective, objective, and safe method for assessing volume status in PD patients. Longitudinal monitoring of body composition changes - including hydration state - leading to adequate therapeutic intervention is a promising and potential application of MF-BIA along with CA.

Published
2019
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20. Soluble intracellular adhesion molecule-1 and omentin-1 as potential biomarkers of subclinical atherosclerosis in hemodialysis patients.

Author

Kocijancic M, Cubranic Z, Vujicic B, Racki S, Dvornik S, and Zaputovic L

Subjects
Adult, Aged, Aged, 80 and over, Atherosclerosis diagnostic imaging, Atherosclerosis epidemiology, Biomarkers blood, Case-Control Studies, Disease Progression, Echocardiography, Doppler methods, Female, Humans, Kidney Failure, Chronic diagnosis, Linear Models, Male, Middle Aged, Multivariate Analysis, Prognosis, Renal Dialysis methods, Retrospective Studies, Risk Assessment, Severity of Illness Index, Solubility, Survival Analysis, Atherosclerosis blood, Intercellular Adhesion Molecule-1 blood, Kidney Failure, Chronic therapy, Renal Dialysis adverse effects, Vascular Cell Adhesion Molecule-1 blood
Abstract

Purpose: Atherosclerotic cardiovascular complications represent significant cause of mortality in hemodialysis (HD) patients. The aims of this study were to: (a) investigate association of sICAM-1, sVCAM-1, omentin-1 and other non-traditional risk factors with subclinical atherosclerosis; (b) examine the diagnostic value of these specific markers in the early detection of subclinical atherosclerosis; and (c) examine their role as predictors of mortality in group of patients with subclinical atherosclerosis on regular HD., Materials and Methods: Starting from November 2011, a cohort of 210 HD patients participated in this 3-year follow-up study. The subjects were divided into three groups according to the presence of atherosclerosis. Atherosclerotic disease was assessed by measuring carotid intima-media thickness (IMT). Samplings were withdrawn at baseline and thereafter every 12 months until the end of follow-up., Results: IMT showed weak correlation with sICAM-1 (r = 0.39, P = 0.001), sVCAM-1 (r = 0.27, P = 0.015) and omentin-1 (r = -0.25, P = 0.020), and also omentin-1 showed good correlation with parameters of systolic and diastolic function (r = 0.52, P = 0.001 and r = 0.51, P = 0.001). Multivariate analysis showed that sICAM-1 and sVCAM-1 concentrations were a strong independent correlate of IMT (P = 0.031 and P = 0.010, respectively). The Cox proportional analysis showed that sICAM-1 and omentin-1 concentrations were strong predictors of cardiovascular death (HR 1.85, CI 1.18-2.32, P = 0.021 and HR 4.14, CI 1.38-12.1, P = 0.004, respectively) and that serial measurements of these markers predict IMT progression (HR 1.98, 95 % CI 1.21-2.38, P < 0.002 and HR 2.91, 95 % CI 1.57-4.72, P < 0.001, respectively)., Conclusions: Our study demonstrated that sICAM-1 and omentin-1 levels are strong predictors of cardiovascular death in HD patients with subclinical atherosclerosis.

Published
2016
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21. Serum omentin-1 levels as a possible risk factor of mortality in patients with diabetes on haemodialysis.

Author

Kocijancic M, Vujicic B, Racki S, Cubranic Z, Zaputovic L, and Dvornik S

Subjects
Adult, Aged, Aged, 80 and over, Biomarkers blood, Diabetes Mellitus, Type 2 complications, Diabetes Mellitus, Type 2 mortality, Diabetic Nephropathies blood, Enzyme-Linked Immunosorbent Assay, Female, GPI-Linked Proteins blood, Humans, Male, Middle Aged, Renal Insufficiency, Chronic blood, Renal Insufficiency, Chronic complications, Risk Factors, Cytokines blood, Diabetes Mellitus, Type 2 blood, Diabetic Nephropathies mortality, Diabetic Nephropathies therapy, Lectins blood, Renal Dialysis adverse effects, Renal Dialysis statistics & numerical data, Renal Insufficiency, Chronic mortality, Renal Insufficiency, Chronic therapy
Abstract

Aim: The main cause of mortality in haemodialysis (HD) patients is cardiovascular disease. Serum omentin-1 level was found to be associated with cardio-metabolic disorders. The aim of this study was to examine the role of omentin-1 as a predictor of mortality in a group of diabetes positive HD patients., Methods: A total of 120 prevalent HD patients were included in the study from December 2012 to May 2014. Patients were divided into two groups according to the presence or absence of diabetes. Venous blood samples were taken at months 0 and 18 following an overnight fast (prior to a midweek HD session). Serum omentin-1 level was assessed by enzyme-linked immunosorbent assay., Results: A total of 84 HD patients were analysed at the end of an 18-month follow-up. Omentin-1 levels of HD patients with diabetes were found to be lower than of HD patients without diabetes (9.1±5.8 ng/mL vs. 11.4±4.1 ng/mL, respectively; P=0.015) at the end of follow-up. Omentin-1 levels of survived patients with diabetes were found to be higher than of nonsurvived patients with diabetes (16.5±10.1 ng/mL vs. 12.9±5.3 ng/mL, respectively; P=0.045). During follow-up, 36 patients (30%) died, of whom 25 had diabetes (34%)., Conclusions: Serum omentin-1 levels were significantly lower in HD patients with diabetes. A decrease in omentin-1 levels could be an independent mortality risk factor in this patient group. Further investigation in a greater number of patients is needed., (Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.)

Published
2015
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22. Left ventricle diastolic dysfunction in obese patients with newly diagnosed arterial hypertension.

Author

Persic V, Ruzic A, Miletic B, Balen S, Jovanovic Z, Vcev A, Racki S, and Vujicic B

Subjects
Adult, Cardiac Volume physiology, Comorbidity, Cross-Sectional Studies, Echocardiography, Doppler, Female, Humans, Hypertension diagnosis, Hypertension epidemiology, Hypertrophy, Left Ventricular diagnosis, Hypertrophy, Left Ventricular epidemiology, Hypertrophy, Left Ventricular physiopathology, Male, Middle Aged, Obesity complications, Obesity epidemiology, Reference Values, Ventricular Dysfunction, Left diagnosis, Ventricular Dysfunction, Left epidemiology, Diastole physiology, Hypertension physiopathology, Obesity physiopathology, Ventricular Dysfunction, Left physiopathology
Abstract

Background: The frequent coexistence of obesity and arterial hypertension is well known. Although both conditions have been identified as independent risk factors for impaired left ventricular diastolic function, there is a paucity of data on the dysfunction among obese patients with newly diagnosed arterial hypertension. The study was performed to determine the prevalence of diastolic dysfunction in obese individuals with newly diagnosed arterial hypertension and to compare it with the prevalence in normotensive obese persons., Methods: We enrolled 125 obese patients: 65 with newly diagnosed hypertension and 60 normotensive patients matched for age, sex and body mass index. Left ventricular diastolic function was assessed from the following Doppler-echocardiographic measurements: mitral inflow velocities (E and A wave), E wave deceleration time, isovolumetric relaxation time, left atrial and left ventricular diameters, left ventricular wall thickness and left ventricular heart mass index. Diastolic dysfunction was considered when the E/A ratio was <1., Results: We found significantly higher A wave, lower E/A ratio, longer E deceleration time and a bigger left atrium in obese patients with newly diagnosed arterial hypertension. We did not find significant differences in E wave peak velocities between the two groups. Although there was no difference in left ventricle heart mass or the prevalence of left ventricle hypertrophy, the prevalence of diastolic dysfunction was higher in the group with newly diagnosed arterial hypertension., Conclusion: This study suggests that newly diagnosed arterial hypertension significantly contributes to impairment of left ventricular diastolic function in obese patients before development of structural aberrations detectable on echocardiography.

Published
2007
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