Measurement of Electron Antineutrino Oscillation Amplitude and Frequency via Neutron Capture on Hydrogen at Daya Bay

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10493911" target="_blank" >RIV/00216208:11320/24:10493911 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=A1Jd3C7jxh" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=A1Jd3C7jxh</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.133.151801" target="_blank" >10.1103/PhysRevLett.133.151801</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of Electron Antineutrino Oscillation Amplitude and Frequency via Neutron Capture on Hydrogen at Daya Bay

Popis výsledku v původním jazyce

This Letter reports the first measurement of the oscillation amplitude and frequency of reactor antineutrinos at Daya Bay via neutron capture on hydrogen using 1958 days of data. With over 3.6 million signal candidates, an optimized candidate selection, improved treatment of backgrounds and efficiencies, refined energy calibration, and an energy response model for the capture-on-hydrogen sensitive region, the relative (nu) over bar (e) rates and energy spectra variation among the near and far detectors gives sin(2)2 theta(13) = 0.0759(-0.0049)(+0.0050) and Delta m(32)(2) = (2.72(-0.15)(+0.14)) x 10(-3) eV(2) assuming the normal neutrino mass ordering, and Delta m(32)(2) = (-2.83(-0.14)(+0.15)) x 10(-3) eV(2) for the inverted neutrino mass ordering. This estimate of sin(2)2 theta(13) is consistent with and essentially independent from the one obtained using the capture-on-gadolinium sample at Daya Bay. The combination of these two results yields sin(2)2 theta(13) = 0.0833 +/- 0.0022, which represents an 8% relative improvement in precision regarding the Daya Bay full 3158-day capture-on-gadolinium result.

Název v anglickém jazyce

Measurement of Electron Antineutrino Oscillation Amplitude and Frequency via Neutron Capture on Hydrogen at Daya Bay

Popis výsledku anglicky

This Letter reports the first measurement of the oscillation amplitude and frequency of reactor antineutrinos at Daya Bay via neutron capture on hydrogen using 1958 days of data. With over 3.6 million signal candidates, an optimized candidate selection, improved treatment of backgrounds and efficiencies, refined energy calibration, and an energy response model for the capture-on-hydrogen sensitive region, the relative (nu) over bar (e) rates and energy spectra variation among the near and far detectors gives sin(2)2 theta(13) = 0.0759(-0.0049)(+0.0050) and Delta m(32)(2) = (2.72(-0.15)(+0.14)) x 10(-3) eV(2) assuming the normal neutrino mass ordering, and Delta m(32)(2) = (-2.83(-0.14)(+0.15)) x 10(-3) eV(2) for the inverted neutrino mass ordering. This estimate of sin(2)2 theta(13) is consistent with and essentially independent from the one obtained using the capture-on-gadolinium sample at Daya Bay. The combination of these two results yields sin(2)2 theta(13) = 0.0833 +/- 0.0022, which represents an 8% relative improvement in precision regarding the Daya Bay full 3158-day capture-on-gadolinium result.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

133

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

151801

Kód UT WoS článku

001382581800001

EID výsledku v databázi Scopus

2-s2.0-85206081586