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.
First Results on the Scalar WIMP-Pion Coupling, Using the XENON1T Experiment / 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.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 122:7(2019), pp. 071301.071301-071301.071308. [10.1103/PhysRevLett.122.071301]
First Results on the Scalar WIMP-Pion Coupling, Using the XENON1T Experiment
Agostini F.Membro del Collaboration Group
;Di Gangi P.Membro del Collaboration Group
;Sartorelli G.Funding Acquisition
;
2019
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
