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Response of the XENON100 Dark Matter Detector to Nuclear Recoils

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arxiv 1304.1427 v2 pith:746GLOQS submitted 2013-04-04 astro-ph.IM astro-ph.CO

Response of the XENON100 Dark Matter Detector to Nuclear Recoils

The XENON100 Collaboration: E. Aprile , M. Alfonsi , K. Arisaka , F. Arneodo , C. Balan , L. Baudis , B. Bauermeister , A. Behrens
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P. Beltrame K. Bokeloh A. Brown E. Brown S. Bruenner G. Bruno R. Budnik J. M. R. Cardoso W.-T. Chen B. Choi A. P. Colijn H. Contreras J. P. Cussonneau M. P. Decowski E. Duchovni S. Fattori A. D. Ferella W. Fulgione F. Gao M. Garbini C. Geis C. Ghag K.-L. Giboni L. W. Goetzke C. Grignon E. Gross W. Hampel R. Itay F. Kaether G. Kessler A. Kish J. Lamblin H. Landsman R. F. Lang M. Le Calloch C. Levy K. E. Lim Q. Lin S. Lindemann M. Lindner J. A. M. Lopes K. Lung T. Marrodan Undagoitia F. V. Massoli A. J. Melgarejo Fernandez Y. Meng M. Messina A. Molinario K. Ni U. Oberlack S. E. A. Orrigo E. Pantic R. Persiani G. Plante N. Priel A. Rizzo S. Rosendahl J. M. F. dos Santos G. Sartorelli J. Schreiner M. Schumann L. Scotto Lavina P. R. Scovell M. Selvi P. Shagin H. Simgen A. Teymourian D. Thers O. Vitells H. Wang M. Weber C. Weinheimer H. Schuhmacher B. Wiegel
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classification astro-ph.IM astro-ph.CO
keywords darkmatterxenon100detectornuclearresultsscintillationsignal
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Results from the nuclear recoil calibration of the XENON100 dark matter detector installed underground at the Laboratori Nazionali del Gran Sasso (LNGS), Italy are presented. Data from measurements with an external 241AmBe neutron source are compared with a detailed Monte Carlo simulation which is used to extract the energy dependent charge-yield Qy and relative scintillation efficiency Leff. A very good level of absolute spectral matching is achieved in both observable signal channels - scintillation S1 and ionization S2 - along with agreement in the 2-dimensional particle discrimination space. The results confirm the validity of the derived signal acceptance in earlier reported dark matter searches of the XENON100 experiment.

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