Limits on contact interactions and leptoquarks at HERA
Creators: name: Abramowicz, H.
name: Abt, I.
name: Adamczyk, L.
name: Adamus, M.
name: Antonelli, S.
name: Aushev, V.
name: Behnke, O.
name: Behrens, Ulf
name: Bertolin, A.
name: Bloch, I.
name: Brock, I.
name: Brook, NH
name: Brugnera, R.
name: Bruni, A.
name: Bussey, Peter
name: Caldwell, A.
name: Capua, M.
name: Catterall, Corinna
name: Chwastowski, J.
name: Ciborowski, J.
name: Ciesielski, R.
name: Cooper-Sarkar, Amanda
name: Corradi, M.
name: Dementiev, RK
name: Devenish, Robin
name: Dusini, S.
name: Foster, B.
name: Gallo-Voss, Elisabetta
name: Garfagnini, A.
name: Geiser, A.
name: Gizhko, Andrii
name: Gladilin, LK
name: Golubkov, Yu A
name: Grzelak, G.
name: Hochman, D.
name: Ibrahim, ZA
name: Iga, Y.
name: Jomhari, Nur Zulaiha
name: Kadenko, I.
name: Kananov, S.
name: Karshon, U.
name: Kaur, P.
name: Aggarwal, R.
name: Kisielewska, D.
name: Klanner, R.
name: Klein, Uta
name: Korzhavina, IA
name: Kotański, A.
name: Kovalchuk, Nataliia
name: Kowalski, H.
name: Krupa, B.
name: Kuprash, Oleg
name: Kuze, M.
name: Levchenko, BB
name: Levy, Aharon
name: Lisovyi, Mikhaylo
name: Löhr, B.
name: Lohrmann, E.
name: Longhin, A.
name: Lukina, OYu
name: Malka, J.
name: Mohamad Idris, F.
name: Mohammad Nasir, N.
name: Myronenko, V.
name: Nagano, K.
name: Onishchuk, Yu
name: Paul, E.
name: Pokrovskiy, NS
name: Przybycien, M.
name: Ruspa, M.
name: Saxon, DH
name: Schioppa, M.
name: Schneekloth, U.
name: Schörner-Sadenius, T.
name: Shcheglova, LM
name: Shyrma, Yu
name: Skillicorn, IO
name: Słomiński, W.
name: Solano, A.
name: Stanco, L.
name: Stefaniuk, Nazar
name: Stern, A.
name: Stopa, P.
name: Sztuk-Dambietz, J.
name: Tassi, E.
name: Tokushuku, K.
name: Tomaszewska, J.
name: Tsurugai, T.
name: Turcato, M.
name: Turkot, O.
name: Tymieniecka, T.
name: Verbytskyi, Andrii
name: Wan Abdullah, WAT
name: Wichmann, K.
name: Wing, M.
name: Yamada, Sakue
name: Yamazaki, Y.
name: Żarnecki, AF
name: Zawiejski, L.
name: Zenaiev, O.
name: Zhautykov, BO
name: Gwenlan, C.
name: Hlushchenko, O.
name: Polini, A.
name: Libov, V.
name: Makarenko, I.
name: Masciocchi, S.
name: Onderwaater, J.
name: Nicassio, M.
name: Selyuzhenkov, I.
name: Nam, JD
name: Surrow, B.
name: Quintero, A.
name: Ferrnado, J.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019
Subjects: parton: distribution function
electron quark: scattering
DESY HERA Stor
contact interaction
leptoquark
deep inelastic scattering
charged current
new physics

description: High-precision HERA data corresponding to a luminosity of around 1 fb$^{-1}$ have been used in the framework of $eeqq$ contact interactions (CI) to set limits on possible high-energy contributions beyond the Standard Model to electron-quark scattering. Measurements of the inclusive deep inelastic cross sections in neutral and charged current $ep$ scattering were considered. The analysis of the $ep$ data has been based on simultaneous fits of parton distribution functions including contributions of CI couplings to $ep$ scattering. Several general CI models and scenarios with heavy leptoquarks were considered. Improvements in the description of the inclusive HERA data were obtained for a few models. Since a statistically significant deviation from the Standard Model cannot be established, limits in the TeV range were set on all models considered.