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EnglishWe present first results on the scalar coupling of weakly interacting massive particles (WIMPs) to pions from 1 t yr of exposure with the XENON1T experiment. This interaction is generated when the WIMP couples to a virtual pion exchanged between the nucleons in a nucleus. In contrast to most nonrelativistic operators, these pion-exchange currents can be coherently enhanced by the total number of nucleons and therefore may dominate in scenarios where spin-independent WIMP-nucleon interactions are suppressed. Moreover, for natural values of the couplings, they dominate over the spin-dependent channel due to their coherence in the nucleus. Using the signal model of this new WIMP-pion channel, no significant excess is found, leading to an upper limit cross section of 6.4×10-46 cm2 (90% confidence level) at 30 GeV/c2 WIMP mass.
| Titolo: | First Results on the Scalar WIMP-Pion Coupling, Using the XENON1T Experiment | |
| Autore/i: | Aprile E.; Aalbers J.; Agostini F.; Alfonsi M.; Althueser L.; Amaro F. D.; Anthony M.; Antochi V. C.; Arneodo F.; Baudis L.; Bauermeister B.; Benabderrahmane M. L.; Berger T.; Breur P. A.; Brown A.; Brown A.; Brown E.; Bruenner S.; Bruno G.; Budnik R.; Capelli C.; Cardoso J. M. R.; Cichon D.; Coderre D.; Colijn A. P.; Conrad J.; Cussonneau J. P.; Decowski M. P.; De Perio P.; Di Gangi P.; Di Giovanni A.; Diglio S.; Elykov A.; Eurin G.; Fei J.; Ferella A. D.; Fieguth A.; Fulgione W.; Gallo Rosso A.; Galloway M.; Gao F.; Garbini M.; Grandi L.; Greene Z.; Hasterok C.; Hogenbirk E.; Howlett J.; Iacovacci M.; Itay R.; Joerg F.; Kaminsky B.; Kazama S.; Kish A.; Koltman G.; Kopec A.; Landsman H.; Lang R. F.; Levinson L.; Lin Q.; Lindemann S.; Lindner M.; Lombardi F.; Lopes J. A. M.; Lopez Fune E.; Macolino C.; Mahlstedt J.; Manfredini A.; Marignetti F.; Marrodan Undagoitia T.; Masbou J.; Masson D.; Mastroianni S.; Messina M.; Micheneau K.; Miller K.; Molinario A.; Mora K.; Murra M.; Naganoma J.; Ni K.; Oberlack U.; Odgers K.; Pelssers B.; Piastra F.; Pienaar J.; Pizzella V.; Plante G.; Podviianiuk R.; Priel N.; Qiu H.; Ramirez Garcia D.; Reichard S.; Riedel B.; Rizzo A.; Rocchetti A.; Rupp N.; Dos Santos J. M. F.; Sartorelli G.; Sarcevic N.; Scheibelhut M.; Schindler S.; Schreiner J.; Schulte D.; Schumann M.; Scotto Lavina L.; Selvi M.; Shagin P.; Shockley E.; Silva M.; Simgen H.; Therreau C.; Thers D.; Toschi F.; Trinchero G.; Tunnell C.; Upole N.; Vargas M.; Wack O.; Wang H.; Wang Z.; Wei Y.; Weinheimer C.; Wenz D.; Wittweg C.; Wulf J.; Ye J.; Zhang Y.; Zhu T.; Zopounidis J. P.; Hoferichter M.; Klos P.; Menendez J.; Schwenk A. | |
| Autore/i Unibo: | ||
| Anno: | 2019 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.122.071301 | |
| Abstract: | We present first results on the scalar coupling of weakly interacting massive particles (WIMPs) to pions from 1 t yr of exposure with the XENON1T experiment. This interaction is generated when the WIMP couples to a virtual pion exchanged between the nucleons in a nucleus. In contrast to most nonrelativistic operators, these pion-exchange currents can be coherently enhanced by the total number of nucleons and therefore may dominate in scenarios where spin-independent WIMP-nucleon interactions are suppressed. Moreover, for natural values of the couplings, they dominate over the spin-dependent channel due to their coherence in the nucleus. Using the signal model of this new WIMP-pion channel, no significant excess is found, leading to an upper limit cross section of 6.4×10-46 cm2 (90% confidence level) at 30 GeV/c2 WIMP mass. | |
| Data stato definitivo: | 2020-03-02T00:57:35Z | |
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