Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA

Andreev, V.; Hessler, J.; Vallée, C.; Daum, K.; Gouzevitch, M.; Baghdasaryan, A.; Britzger, D.; Patel, G. D.; Traynor, D.; Chekelian, V.; Žlebčík, R.; H1 Collaboration; Laycock, P.; Mehta, A.; Egli, S.; Picuric, I.; Wünsch, E.; Park, S.; Olsson, J. E.; Schmookler, B. A.; Maxfield, S. J.; Baty, A.; Hreus, T.; Tustin, G.; Kluth, S.; Sun, C.; Huber, F.; Cerny, K.; Schöning, A.; Lipka, K.; Valkárová, A.; Petrukhin, A.; Zohrabyan, H.; Acosta, F. Torales; Favart, L.; Henderson, R. C. W.; Li, W.; Katzy, J.; Rizvi, E.; Van Mechelen, P.; Campbell, A. J.; Drees, A.; Reichelt, D.; Stöcker, L.; Polifka, R.; Jacquet, M.; Fleischer, M.; Malinovski, E.; Lobodzinski, B.; Hoffmann, D.; Martyn, H.-U.; Steder, M.; Eckerlin, G.; Contreras, J. G.; Roosen, R.; Krücker, D.; Begzsuren, K.; Nachman, B.; Mikuni, V. M.; Wegener, D.; Elsen, E.; Janssen, T.; Sauvan, E.; Perez, E.; Tu, Z.; Gayler, J.; Kleinwort, C.; Arratia, M.; Ravdandorj, T.; Jung, A. W.; Newman, P. R.; Lin, J.; Goerlich, L.; Feltesse, J.; Brandt, G.; Schumann, S.; Shushkevich, S.; Fomenko, A.; Hladký, J.; Pitzl, D.; Lee, S. H.; Krüger, K.; List, B.; Jacobs, P. M.; Bolz, A.; Meyer, J.; Mondal, M. M.; Radescu, V.; Gal, C.; Levonian, S.; List, J.; Grindhammer, G.; Thompson, P. D.; Greenshaw, T.; Tseepeldorj, B.; Buniatyan, A.; Kostka, P.; Reimer, P.; Kretzschmar, J.; Chen, Z.; Soloviev, Y.; Zhang, Z.; Diaconu, C.; Schmitt, S.; Nowak, G.; Sankey, D. P. C.; Klest, H. T.; Ozerov, D.; Müller, K.; Sykora, T.; Boudry, V.; Raicevic, N.; Landon, M. P. J.; Žáček, J.; Preins, S.; Rostovtsev, A.; Dainton, J. B.; Straumann, U.; Pascaud, C.; Fedotov, A.; Schoeffel, L.; Sauter, M.; Gogitidze, N.; South, D.; Grab, C.; Bystritskaya, L.; Long, O. R.; Mikocki, S.; Naumann, Th.; Schnell, G.; Zhang, J.; Kogler, R.; Zomer, F.; Cvach, J.; Sopicki, P.; Meyer, A. B.; Haidt, D.; Lange, W.; Deshpande, A.; Sefkow, F.; Horisberger, R.; Stella, B.; Rotaru, M.; Cantun Avila, K. B.; Klein, M.; Niebuhr, C.; Specka, A.; Kiesling, C.; Robmann, P.

Preprint

PUBDB-2024-06521

Measurement of the 1-jettiness event shape observable in deep-inelastic electron-proton scattering at HERA

Andreev, V. ; Arratia, M. ; Baghdasaryan, A. ; Baty, A. ; Begzsuren, K. ; Bolz, A.Extern*DESY* ; Boudry, V. ; Brandt, G. ; Britzger, D. ; Buniatyan, A. ; Bystritskaya, L. ; Campbell, A. J. ; Cantun Avila, K. B. ; Cerny, K. ; Chekelian, V. ; Chen, Z. ; Contreras, J. G. ; Cvach, J. ; Dainton, J. B. ; Daum, K. ; Deshpande, A. ; Diaconu, C. ; Drees, A. ; Eckerlin, G. ; Egli, S. ; Elsen, E. ; Favart, L. ; Fedotov, A. ; Feltesse, J. ; Fleischer, M. ; Fomenko, A. ; Gal, C. ; Gayler, J. ; Goerlich, L. ; Gogitidze, N. ; Gouzevitch, M. ; Grab, C. ; Greenshaw, T. ; Grindhammer, G. ; Haidt, D. ; Henderson, R. C. W. ; Hessler, J. ; Hladký, J. ; Hoffmann, D. ; Horisberger, R. ; Hreus, T. ; Huber, F. ; Jacobs, P. M. ; Jacquet, M. ; Janssen, T. ; Jung, A. W. ; Katzy, J. ; Kiesling, C. ; Klein, M. ; Kleinwort, C.DESY* ; Klest, H. T. ; Kluth, S. ; Kogler, R. ; Kostka, P. ; Kretzschmar, J. ; Krücker, D.DESY* ; Krüger, K. ; Landon, M. P. J. ; Lange, W. ; Laycock, P. ; Lee, S. H. ; Levonian, S. ; Li, W. ; Lin, J. ; Lipka, K.DESY* ; List, B. ; List, J. ; Lobodzinski, B. ; Long, O. R. ; Malinovski, E. ; Martyn, H.-U. ; Maxfield, S. J. ; Mehta, A. ; Meyer, A. B. ; Meyer, J. ; Mikocki, S. ; Mikuni, V. M. ; Mondal, M. M. ; Müller, K. ; Nachman, B. ; Naumann, T. ; Newman, P. R. ; Niebuhr, C.DESY* ; Nowak, G. ; Olsson, J. E. ; Ozerov, D. ; Park, S. ; Pascaud, C. ; Patel, G. D. ; Perez, E. ; Petrukhin, A. ; Picuric, I. ; Pitzl, D.DESY* ; Polifka, R. ; Preins, S. ; Radescu, V. ; Raicevic, N. ; Ravdandorj, T. ; Reichelt, D. ; Reimer, P. ; Rizvi, E. ; Robmann, P. ; Roosen, R. ; Rostovtsev, A. ; Rotaru, M. ; Sankey, D. P. C. ; Sauter, M. ; Sauvan, E. ; Schmitt, S. (Corresponding author)DESY* ; Schmookler, B. A. ; Schnell, G. ; Schoeffel, L. ; Schöning, A. ; Schumann, S. ; Sefkow, F. ; Shushkevich, S. ; Soloviev, Y. ; Sopicki, P. ; South, D. ; Specka, A. ; Steder, M. ; Stella, B. ; Stöcker, L. ; Straumann, U. ; Sun, C. ; Sykora, T. ; Thompson, P. D. ; Acosta, F. T. ; Traynor, D. ; Tseepeldorj, B. ; Tu, Z. ; Tustin, G. ; Valkárová, A. ; Vallée, C. ; Van Mechelen, P. ; Wegener, D. ; Wünsch, E. ; Žáček, J. ; Zhang, J. ; Zhang, Z. ; Žlebčík, R. ; Zohrabyan, H. ; Zomer, F. ; H1 Collaboration (Collaboration author)DESY*

2024

[10.3204/PUBDB-2024-06521]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2024-06521

Report No.: DESY-24-035; arXiv:2403.10109

Abstract: The H1 Collaboration reports the first measurement of the 1-jettiness event shape observable $\tau _1^b$ in neutral-current deep-inelastic electron-proton scattering (DIS). The observable $\tau _1^b$ is equivalent to a thrust observable defined in the Breit frame. The data sample was collected at the HERA ep collider in the years 2003–2007 with center-of-mass energy of $\sqrt{s}=319\,\textrm{GeV} $, corresponding to an integrated luminosity of 351.1 $\textrm{pb}^{-1}$. Triple differential cross sections are provided as a function of $\tau _1^b$, event virtuality $Q^{2}$, and inelasticity y, in the kinematic region $Q^{2} >150\,\textrm{GeV}^2 $. Single differential cross sections are provided as a function of $\tau _1^b$ in a limited kinematic range. Double differential cross sections are measured, in contrast, integrated over $\tau _1^b$ and represent the inclusive neutral-current DIS cross section measured as a function of $Q^{2}$ and y. The data are compared to a variety of predictions and include long-standing and more recent Monte Carlo event generators, predictions in fixed-order perturbative QCD where calculations up to $\mathcal {O}(\alpha _\textrm{s} ^3)$ are available for $\tau _1^b$ or inclusive DIS, and resummed predictions at next-to-leading logarithmic accuracy matched to fixed order predictions at $\mathcal {O}(\alpha _\textrm{s} ^2)$. These comparisons reveal sensitivity of the 1-jettiness observable to QCD parton shower and resummation effects, as well as the modeling of hadronization and fragmentation. Within their range of validity, the fixed-order predictions provide a good description of the data. Monte Carlo event generators are predictive over the full measured range and hence their underlying models and parameters can be constrained by comparing to the presented data.

Keyword(s): electron p: scattering ; electron p: deep inelastic scattering ; deep inelastic scattering: neutral current ; cross section: measured ; quantum chromodynamics: perturbation theory ; parton: showers ; numerical calculations: Monte Carlo ; differential cross section: measured ; momentum transfer dependence ; event shape analysis ; kinematics ; DESY HERA Stor ; H1 ; fragmentation ; sensitivity ; resummation ; thrust ; Breit frame ; hadronization ; data analysis method ; experimental results ; 319 GeV-cms