Background-independent measurement of θ[subscript 13] in Double Chooz
The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle θ[subscript 13] by including 7.53 days of reactor-off data. A g...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Elsevier
2015
|
| Online Access: | http://hdl.handle.net/1721.1/98040 https://orcid.org/0000-0002-9970-108X https://orcid.org/0000-0002-6393-0438 |
| _version_ | 1811094786947416064 |
|---|---|
| author | Conrad, Janet Spitz, Joshua B. Terao, K. Winslow, Lindley |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Conrad, Janet Spitz, Joshua B. Terao, K. Winslow, Lindley |
| author_sort | Conrad, Janet |
| collection | MIT |
| description | The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle θ[subscript 13] by including 7.53 days of reactor-off data. A global fit of the observed antineutrino rates for different reactor power conditions is performed, yielding a measurement of bothθ[subscript 13] and the total background rate. The results on the mixing angle are improved significantly by including the reactor-off data in the fit, as it provides a direct measurement of the total background rate. This reactor rate modulation analysis considers antineutrino candidates with neutron captures on both Gd and H, whose combination yields sin[superscript 2](2θ[subscript 13]) = 0.102 ± 0.028(stat.) ± 0.033(syst.). The results presented in this study are fully consistent with the ones already published by Double Chooz, achieving a competitive precision. They provide, for the first time, a determination of θ[subscript 13] that does not depend on a background model. |
| first_indexed | 2024-09-23T16:05:06Z |
| format | Article |
| id | mit-1721.1/98040 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:05:06Z |
| publishDate | 2015 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/980402022-09-29T18:06:58Z Background-independent measurement of θ[subscript 13] in Double Chooz Conrad, Janet Spitz, Joshua B. Terao, K. Winslow, Lindley Massachusetts Institute of Technology. Department of Physics Conrad, Janet Spitz, Joshua B. Terao, K. Winslow, Lindley The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle θ[subscript 13] by including 7.53 days of reactor-off data. A global fit of the observed antineutrino rates for different reactor power conditions is performed, yielding a measurement of bothθ[subscript 13] and the total background rate. The results on the mixing angle are improved significantly by including the reactor-off data in the fit, as it provides a direct measurement of the total background rate. This reactor rate modulation analysis considers antineutrino candidates with neutron captures on both Gd and H, whose combination yields sin[superscript 2](2θ[subscript 13]) = 0.102 ± 0.028(stat.) ± 0.033(syst.). The results presented in this study are fully consistent with the ones already published by Double Chooz, achieving a competitive precision. They provide, for the first time, a determination of θ[subscript 13] that does not depend on a background model. United States. Dept. of Energy National Science Foundation (U.S.) 2015-08-05T18:49:58Z 2015-08-05T18:49:58Z 2014-05 2014-04 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/98040 Abe, Y., et al. “Background-independent measurement of θ[subscript 13] in Double Chooz.” Physics Letters B 735 (July 2014): 51–56. https://orcid.org/0000-0002-9970-108X https://orcid.org/0000-0002-6393-0438 en_US http://dx.doi.org/10.1016/j.physletb.2014.04.045 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier Elsevier Open Access |
| spellingShingle | Conrad, Janet Spitz, Joshua B. Terao, K. Winslow, Lindley Background-independent measurement of θ[subscript 13] in Double Chooz |
| title | Background-independent measurement of θ[subscript 13] in Double Chooz |
| title_full | Background-independent measurement of θ[subscript 13] in Double Chooz |
| title_fullStr | Background-independent measurement of θ[subscript 13] in Double Chooz |
| title_full_unstemmed | Background-independent measurement of θ[subscript 13] in Double Chooz |
| title_short | Background-independent measurement of θ[subscript 13] in Double Chooz |
| title_sort | background independent measurement of θ subscript 13 in double chooz |
| url | http://hdl.handle.net/1721.1/98040 https://orcid.org/0000-0002-9970-108X https://orcid.org/0000-0002-6393-0438 |
| work_keys_str_mv | AT conradjanet backgroundindependentmeasurementofthsubscript13indoublechooz AT spitzjoshuab backgroundindependentmeasurementofthsubscript13indoublechooz AT teraok backgroundindependentmeasurementofthsubscript13indoublechooz AT winslowlindley backgroundindependentmeasurementofthsubscript13indoublechooz |