Sensitivity of the NEXT experiment to Xe-124 double electron capture

J Díaz; D González-Díaz; M Kekic; L Labarga; A Laing; P Lebrun; N López-March; M Losada; R. D. P Mano; J Martín-Albo; A Martínez; A. D McDonald; F Monrabal; C. M. B Monteiro; F. J Mora; J. Muñoz Vidal; P Novella; D. R Nygren; B Palmeiro; A Para; J Pérez; M Querol; J Renner; J Repond; S Riordan; L Ripoll; Y. Rodríguez García; J Rodríguez; L Rogers; B Romeo; C Romo-Luque; F. P Santos; J. M. F. dos Santos; C Sofka; T Stiegler; J. F Toledo; J Torrent; A Usón; J. F. C. A Veloso; R Webb; J. T White; K Woodruff; N Yahlali

doi:10.1007/JHEP02(2021)203

Sensitivity of the NEXT experiment to Xe-124 double electron capture

J Díaz, D González-Díaz, M Kekic, L Labarga, A Laing, P Lebrun, N López-March, M Losada, R. D. P Mano, J Martín-Albo, A Martínez, A. D McDonald, F Monrabal, C. M. B Monteiro, F. J Mora, J. Muñoz Vidal, P Novella, D. R Nygren, B Palmeiro, A ParaJ Pérez, M Querol, J Renner, J Repond, S Riordan, L Ripoll, Y. Rodríguez García, J Rodríguez, L Rogers, B Romeo, C Romo-Luque, F. P Santos, J. M. F. dos Santos, C Sofka, T Stiegler, J. F Toledo, J Torrent, A Usón, J. F. C. A Veloso, R Webb, J. T White, K Woodruff, N Yahlali,

Weizmann Institute of Science, Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

Abstract

Double electron capture by proton-rich nuclei is a second-order nuclearprocess analogous to double beta decay. Despite their similarities, the decaysignature is quite different, potentially providing a new channel to measurethe hypothesized neutrinoless mode of these decays. The Standard-Model-allowedtwo-neutrino double electron capture ($2\nu ECEC$) has been predicted for anumber of isotopes, but only observed in $^{78}$Kr, $^{130}$Ba and, recently,$^{124}$Xe. The sensitivity to this decay establishes a benchmark for theultimate experimental goal, namely the potential to discover also thelepton-number-violating neutrinoless version of this process, $0\nu ECEC$. Herewe report on the current sensitivity of the NEXT-White detector to $^{124}$Xe$2\nu ECEC$ and on the extrapolation to NEXT-100. Using simulated data for the$2\nu ECEC$ signal and real data from NEXT-White operated with$^{124}$Xe-depleted gas as background, we define an optimal event selectionthat maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100operated with xenon gas isotopically enriched with 1 kg of $^{124}$Xe and for a5-year run, a sensitivity to the $2\nu ECEC$ half-life of $6 \times 10^{22}$ y(at 90% confidence level) or better can be reached.

Original language	English
Article number	203
Number of pages	25
Journal	The journal of high energy physics
Volume	2021
Issue number	2
DOIs	https://doi.org/10.1007/JHEP02(2021)203
State	Published - 24 Feb 2021

Keywords

Dark Matter and Double Beta Decay (experiments)

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1007/JHEP02(2021)203License: CC BY

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Díaz, J., González-Díaz, D., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., McDonald, A. D., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. M., Novella, P., Nygren, D. R., Palmeiro, B. (2021). Sensitivity of the NEXT experiment to Xe-124 double electron capture. The journal of high energy physics, 2021(2), Article 203. https://doi.org/10.1007/JHEP02(2021)203

@article{9a5e88a1a9b74e6a93eade49101b94aa,

title = "Sensitivity of the NEXT experiment to Xe-124 double electron capture",

abstract = "Double electron capture by proton-rich nuclei is a second-order nuclearprocess analogous to double beta decay. Despite their similarities, the decaysignature is quite different, potentially providing a new channel to measurethe hypothesized neutrinoless mode of these decays. The Standard-Model-allowedtwo-neutrino double electron capture (\$2\textbackslash{}nu ECEC\$) has been predicted for anumber of isotopes, but only observed in \$\textasciicircum{}\{78\}\$Kr, \$\textasciicircum{}\{130\}\$Ba and, recently,\$\textasciicircum{}\{124\}\$Xe. The sensitivity to this decay establishes a benchmark for theultimate experimental goal, namely the potential to discover also thelepton-number-violating neutrinoless version of this process, \$0\textbackslash{}nu ECEC\$. Herewe report on the current sensitivity of the NEXT-White detector to \$\textasciicircum{}\{124\}\$Xe\$2\textbackslash{}nu ECEC\$ and on the extrapolation to NEXT-100. Using simulated data for the\$2\textbackslash{}nu ECEC\$ signal and real data from NEXT-White operated with\$\textasciicircum{}\{124\}\$Xe-depleted gas as background, we define an optimal event selectionthat maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100operated with xenon gas isotopically enriched with 1 kg of \$\textasciicircum{}\{124\}\$Xe and for a5-year run, a sensitivity to the \$2\textbackslash{}nu ECEC\$ half-life of \$6 \textbackslash{}times 10\textasciicircum{}\{22\}\$ y(at 90\% confidence level) or better can be reached.",

keywords = "Dark Matter and Double Beta Decay (experiments)",

author = "G Mart{\'i}nez-Lema and M Mart{\'i}nez-Vara and M Sorel and C Adams and V Alvarez and L Arazi and Arnquist, \{I. J\} and Azevedo, \{C. D. R\} and K Bailey and F Ballester and Benlloch-Rodr{\'i}guez, \{J. M\} and Borges, \{F. I. G. M\} and N Byrnes and S C{\'a}rcel and Carri{\'o}n, \{J. V\} and S Cebri{\'a}n and E Church and Conde, \{C. A. N\} and T Contreras and G D{\'i}az and J D{\'i}az and M Diesburg and J Escada and R Esteve and R Felkai and Fernandes, \{A. F. M\} and Fernandes, \{L. M. P\} and P Ferrario and Ferreira, \{A. L\} and Freitas, \{E. D. C\} and J Generowicz and S Ghosh and A Goldschmidt and G{\'o}mez-Cadenas, \{J. J\} and D Gonz{\'a}lez-D{\'i}az and R Guenette and Guti{\'e}rrez, \{R. M\} and J Haefner and K Hafidi and J Hauptman and Henriques, \{C. A. O\} and Morata, \{J. A. Hernando\} and P Herrero and V Herrero and Y Ifergan and S Johnston and Jones, \{B. J. P\} and M Kekic and L Labarga and A Laing and P Lebrun and N L{\'o}pez-March and M Losada and Mano, \{R. D. P\} and J Mart{\'i}n-Albo and A Mart{\'i}nez and McDonald, \{A. D\} and F Monrabal and Monteiro, \{C. M. B\} and Mora, \{F. J\} and Vidal, \{J. Mu{\~n}oz\} and P Novella and Nygren, \{D. R\} and B Palmeiro and A Para and J P{\'e}rez and M Querol and Redwine, \{A. B\} and J Renner and J Repond and S Riordan and L Ripoll and Garc{\'i}a, \{Y. Rodr{\'i}guez\} and J Rodr{\'i}guez and L Rogers and B Romeo and C Romo-Luque and Santos, \{F. P\} and Santos, \{J. M. F. dos\} and A Sim{\'o}n and C Sofka and T Stiegler and Toledo, \{J. F\} and J Torrent and A Us{\'o}n and Veloso, \{J. F. C. A\} and R Webb and R Weiss-Babai and White, \{J. T\} and K Woodruff and N Yahlali",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = feb,

day = "24",

doi = "10.1007/JHEP02(2021)203",

language = "الإنجليزيّة",

volume = "2021",

journal = "The journal of high energy physics",

issn = "1029-8479",

publisher = "Springer Verlag",

number = "2",

}

Díaz, J, González-Díaz, D, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, McDonald, AD, Monrabal, F, Monteiro, CMB, Mora, FJ, Vidal, JM, Novella, P, Nygren, DR, Palmeiro, B, Para, A, Pérez, J, Querol, M, Renner, J, Repond, J, Riordan, S, Ripoll, L, García, YR, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, Santos, JMFD, Sofka, C, Stiegler, T, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Webb, R, White, JT, Woodruff, K, Yahlali, N 2021, 'Sensitivity of the NEXT experiment to Xe-124 double electron capture', The journal of high energy physics, vol. 2021, no. 2, 203. https://doi.org/10.1007/JHEP02(2021)203

TY - JOUR

T1 - Sensitivity of the NEXT experiment to Xe-124 double electron capture

AU - Martínez-Lema, G

AU - Martínez-Vara, M

AU - Sorel, M

AU - Adams, C

AU - Alvarez, V

AU - Arazi, L

AU - Arnquist, I. J

AU - Azevedo, C. D. R

AU - Bailey, K

AU - Ballester, F

AU - Benlloch-Rodríguez, J. M

AU - Borges, F. I. G. M

AU - Byrnes, N

AU - Cárcel, S

AU - Carrión, J. V

AU - Cebrián, S

AU - Church, E

AU - Conde, C. A. N

AU - Contreras, T

AU - Díaz, G

AU - Díaz, J

AU - Diesburg, M

AU - Escada, J

AU - Esteve, R

AU - Felkai, R

AU - Fernandes, A. F. M

AU - Fernandes, L. M. P

AU - Ferrario, P

AU - Ferreira, A. L

AU - Freitas, E. D. C

AU - Generowicz, J

AU - Ghosh, S

AU - Goldschmidt, A

AU - Gómez-Cadenas, J. J

AU - González-Díaz, D

AU - Guenette, R

AU - Gutiérrez, R. M

AU - Haefner, J

AU - Hafidi, K

AU - Hauptman, J

AU - Henriques, C. A. O

AU - Morata, J. A. Hernando

AU - Herrero, P

AU - Herrero, V

AU - Ifergan, Y

AU - Johnston, S

AU - Jones, B. J. P

AU - Kekic, M

AU - Labarga, L

AU - Laing, A

AU - Lebrun, P

AU - López-March, N

AU - Losada, M

AU - Mano, R. D. P

AU - Martín-Albo, J

AU - Martínez, A

AU - McDonald, A. D

AU - Monrabal, F

AU - Monteiro, C. M. B

AU - Mora, F. J

AU - Vidal, J. Muñoz

AU - Novella, P

AU - Nygren, D. R

AU - Palmeiro, B

AU - Para, A

AU - Pérez, J

AU - Querol, M

AU - Redwine, A. B

AU - Renner, J

AU - Repond, J

AU - Riordan, S

AU - Ripoll, L

AU - García, Y. Rodríguez

AU - Rodríguez, J

AU - Rogers, L

AU - Romeo, B

AU - Romo-Luque, C

AU - Santos, F. P

AU - Santos, J. M. F. dos

AU - Simón, A

AU - Sofka, C

AU - Stiegler, T

AU - Toledo, J. F

AU - Torrent, J

AU - Usón, A

AU - Veloso, J. F. C. A

AU - Webb, R

AU - Weiss-Babai, R

AU - White, J. T

AU - Woodruff, K

AU - Yahlali, N

PY - 2021/2/24

Y1 - 2021/2/24

N2 - Double electron capture by proton-rich nuclei is a second-order nuclearprocess analogous to double beta decay. Despite their similarities, the decaysignature is quite different, potentially providing a new channel to measurethe hypothesized neutrinoless mode of these decays. The Standard-Model-allowedtwo-neutrino double electron capture ($2\nu ECEC$) has been predicted for anumber of isotopes, but only observed in $^{78}$Kr, $^{130}$Ba and, recently,$^{124}$Xe. The sensitivity to this decay establishes a benchmark for theultimate experimental goal, namely the potential to discover also thelepton-number-violating neutrinoless version of this process, $0\nu ECEC$. Herewe report on the current sensitivity of the NEXT-White detector to $^{124}$Xe$2\nu ECEC$ and on the extrapolation to NEXT-100. Using simulated data for the$2\nu ECEC$ signal and real data from NEXT-White operated with$^{124}$Xe-depleted gas as background, we define an optimal event selectionthat maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100operated with xenon gas isotopically enriched with 1 kg of $^{124}$Xe and for a5-year run, a sensitivity to the $2\nu ECEC$ half-life of $6 \times 10^{22}$ y(at 90% confidence level) or better can be reached.

AB - Double electron capture by proton-rich nuclei is a second-order nuclearprocess analogous to double beta decay. Despite their similarities, the decaysignature is quite different, potentially providing a new channel to measurethe hypothesized neutrinoless mode of these decays. The Standard-Model-allowedtwo-neutrino double electron capture ($2\nu ECEC$) has been predicted for anumber of isotopes, but only observed in $^{78}$Kr, $^{130}$Ba and, recently,$^{124}$Xe. The sensitivity to this decay establishes a benchmark for theultimate experimental goal, namely the potential to discover also thelepton-number-violating neutrinoless version of this process, $0\nu ECEC$. Herewe report on the current sensitivity of the NEXT-White detector to $^{124}$Xe$2\nu ECEC$ and on the extrapolation to NEXT-100. Using simulated data for the$2\nu ECEC$ signal and real data from NEXT-White operated with$^{124}$Xe-depleted gas as background, we define an optimal event selectionthat maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100operated with xenon gas isotopically enriched with 1 kg of $^{124}$Xe and for a5-year run, a sensitivity to the $2\nu ECEC$ half-life of $6 \times 10^{22}$ y(at 90% confidence level) or better can be reached.

KW - Dark Matter and Double Beta Decay (experiments)

UR - http://www.scopus.com/inward/record.url?scp=85101833596&partnerID=8YFLogxK

U2 - 10.1007/JHEP02(2021)203

DO - 10.1007/JHEP02(2021)203

M3 - مقالة

SN - 1029-8479

VL - 2021

JO - The journal of high energy physics

JF - The journal of high energy physics

IS - 2

M1 - 203

ER -

Sensitivity of the NEXT experiment to Xe-124 double electron capture

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