Precision Measurement of Reactor Antineutrino Oscillation at Kilometer-Scale Baselines by Daya Bay

We present a new determination of the smallest neutrino mixing angle <math display="inline"><msub><mi>θ</mi><mn>13</mn></msub></math> and the mass-squared difference <math display="inline"><mi mathvariant="normal"...

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Detalles Bibliográficos
Autores principales: An, F.P., Bai, W.D., Balantekin, A.B., Bishai, M., Blyth, S., Cao, G.F., Cao, J., Chang, J.F., Chang, Y., Chen, H.S., Chen, H.Y., Chen, S.M., Chen, Y., Chen, Y.X., Chen, Z.Y., Cheng, J., Cheng, Z.K., Cherwinka, J.J., Chu, M.C., Cummings, J.P., Dalager, O., Deng, F.S., Ding, Y.Y., Ding, X.Y., Diwan, M.V., Dohnal, T., Dolzhikov, D., Dove, J., Duyang, H.Y., Dwyer, D.A., Gallo, J.P., Gonchar, M., Gong, G.H., Gong, H., Gu, W.Q., Guo, J.Y., Guo, L., Guo, X.H., Guo, Y.H., Guo, Z., Hackenburg, R.W., Han, Y., Hans, S., He, M., Heeger, K.M., Heng, Y.K., Hor, Y.K., Hsiung, Y.B., Hu, B.Z., Hu, J.R., Hu, T., Hu, Z.J., Huang, H.X., Huang, J.H., Huang, X.T., Huang, Y.B., Huber, P., Jaffe, D.E., Jen, K.L., Ji, X.L., Ji, X.P., Johnson, R.A., Jones, D., Kang, L., Kettell, S.H., Kohn, S., Kramer, M., Langford, T.J., Lee, J., Lee, J.H.C., Lei, R.T., Leitner, R., Leung, J.K.C., Li, F., Li, H.L., Li, J.J., Li, Q.J., Li, R.H., Li, S., Li, S.C., Li, W.D., Li, X.N., Li, X.Q., Li, Y.F., Li, Z.B., Liang, H., Lin, C.J., Lin, G.L., Lin, S., Ling, J.J., Link, J.M., Littenberg, L., Littlejohn, B.R., Liu, J.C., Liu, J.L., Liu, J.X., Lu, C., Lu, H.Q., Luk, K.B., Ma, B.Z., Ma, X.B., Ma, X.Y., Ma, Y.Q., Mandujano, R.C., Marshall, C., McDonald, K.T., McKeown, R.D., Meng, Y., Napolitano, J., Naumov, D., Naumova, E., Nguyen, T.M.T., Ochoa-Ricoux, J.P., Olshevskiy, A., Pan, H.-R., Park, J., Patton, S., Peng, J.C., Pun, C.S.J., Qi, F.Z., Qi, M., Qian, X., Raper, N., Ren, J., Reveco, C. Morales, Rosero, R., Roskovec, B., Ruan, X.C., Russell, B., Steiner, H., Sun, J.L., Tmej, T., Treskov, K., Tse, W.-H., Tull, C.E., Viren, B., Vorobel, V., Wang, C.H., Wang, J., Wang, M., Wang, N.Y., Wang, R.G., Wang, W., Wang, X., Wang, Y., Wang, Y.F., Wang, Z., Wei, H.Y., Wei, L.H., Wei, W., Wen, L.J., Whisnant, K., White, C.G., Wong, H.L.H., Worcester, E., Wu, D.R., Wu, Q., Wu, W.J., Xia, D.M., Xie, Z.Q., Xing, Z.Z., Xu, H.K., Xu, J.L., Xu, T., Xue, T., Yang, C.G., Yang, L., Yang, Y.Z., Yao, H.F., Ye, M., Yeh, M., Young, B.L., Yu, H.Z., Yu, Z.Y., Yue, B.B., Zavadskyi, V., Zeng, S., Zeng, Y., Zhan, L., Zhang, C., Zhang, F.Y., Zhang, H.H., Zhang, J.L., Zhang, J.W., Zhang, Q.M., Zhang, S.Q., Zhang, X.T., Zhang, Y.M., Zhang, Y.X., Zhang, Y.Y., Zhang, Z.J., Zhang, Z.P., Zhang, Z.Y., Zhao, J., Zhao, R.Z., Zhou, L., Zhuang, H.L., Zou, J.H.
Lenguaje:eng
Publicado: 2022
Materias:
hep-ex
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.130.161802
http://cds.cern.ch/record/2856837
Descripción
Sumario:We present a new determination of the smallest neutrino mixing angle <math display="inline"><msub><mi>θ</mi><mn>13</mn></msub></math> and the mass-squared difference <math display="inline"><mi mathvariant="normal">Δ</mi><msubsup><mi>m</mi><mn>32</mn><mn>2</mn></msubsup></math> using a final sample of <math display="inline"><mn>5.55</mn><mo>×</mo><msup><mn>10</mn><mn>6</mn></msup></math> inverse beta-decay (IBD) candidates with the final-state neutron captured on gadolinium. This sample is selected from the complete dataset obtained by the Daya Bay reactor neutrino experiment in 3158 days of operation. Compared to the previous Daya Bay results, selection of IBD candidates has been optimized, energy calibration refined, and treatment of backgrounds further improved. The resulting oscillation parameters are <math display="inline"><mrow><msup><mrow><mi>sin</mi></mrow><mrow><mn>2</mn></mrow></msup><mn>2</mn><msub><mrow><mi>θ</mi></mrow><mrow><mn>13</mn></mrow></msub><mo>=</mo><mn>0.0851</mn><mo>±</mo><mn>0.0024</mn></mrow></math>, <math display="inline"><mrow><mi mathvariant="normal">Δ</mi><msubsup><mrow><mi>m</mi></mrow><mrow><mn>32</mn></mrow><mrow><mn>2</mn></mrow></msubsup><mo>=</mo><mo stretchy="false">(</mo><mn>2.466</mn><mo>±</mo><mn>0.060</mn><mo stretchy="false">)</mo><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>-</mo><mn>3</mn></mrow></msup><mtext> </mtext><mtext> </mtext><msup><mrow><mi>eV</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math> for the normal mass ordering or <math display="inline"><mrow><mi mathvariant="normal">Δ</mi><msubsup><mrow><mi>m</mi></mrow><mrow><mn>32</mn></mrow><mrow><mn>2</mn></mrow></msubsup><mo>=</mo><mo>-</mo><mo stretchy="false">(</mo><mn>2.571</mn><mo>±</mo><mn>0.060</mn><mo stretchy="false">)</mo><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>-</mo><mn>3</mn></mrow></msup><mtext> </mtext><mtext> </mtext><msup><mrow><mi>eV</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math> for the inverted mass ordering.

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