BibTex format
@article{Abratenko:2024:07/P07032,
author = {Abratenko, P and Alterkait, O and Andrade, Aldana D and Arellano, L and Asaadi, J and Ashkenazi, A and Balasubramanian, S and Baller, B and Barr, G and Barrow, D and Barrow, J and Basque, V and Benevides, Rodrigues O and Berkman, S and Bhanderi, A and Bhat, A and Bhattacharya, M and Bishai, M and Blake, A and Bogart, B and Bolton, T and Book, JY and Camilleri, L and Cao, Y and Caratelli, D and Caro, Terrazas I and Cavanna, F and Cerati, G and Chen, Y and Conrad, JM and Convery, M and Cooper-Troendle, L and Crespo-Anadón, JI and Cross, R and Del, Tutto M and Dennis, SR and Detje, P and Devitt, A and Diurba, R and Djurcic, Z and Dorrill, R and Duffy, K and Dytman, S and Eberly, B and Englezos, P and Ereditato, A and Evans, JJ and Fine, R and Finnerud, OG and Fleming, BT and Foreman, W and Foppiani, N and Franco, D and Furmanski, AP and Garcia-Gamez, D and Gardiner, S and Ge, G and Gollapinni, S and Goodwin, O and Gramellini, E and Green, P and Greenlee, H and Gu, W and Guenette, R and Gu},
doi = {07/P07032},
journal = {Journal of Instrumentation},
title = {First application of a liquid argon time projection chamber for the search for intranuclear neutron-antineutron transitions and annihilation in <sup>40</sup>Ar using the MicroBooNE detector},
url = {http://dx.doi.org/10.1088/1748-0221/19/07/P07032},
volume = {19},
year = {2024}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - We present a novel methodology to search for intranuclear neutron-antineutron transition (n → n) followed by n-nucleon annihilation within an 40Ar nucleus, using the MicroBooNE liquid argon time projection chamber (LArTPC) detector. A discovery of n → n transition or a new best limit on the lifetime of this process would either constitute physics beyond the Standard Model or greatly constrain theories of baryogenesis, respectively. The approach presented in this paper makes use of deep learning methods to select n → n events based on their unique features and differentiate them from cosmogenic backgrounds. The achieved signal and background efficiencies are (70.22 ± 6.04)% and (0.0020 ± 0.0003)%, respectively. A demonstration of a search is performed with a data set corresponding to an exposure of 3.32 × 1026 neutron-years, and where the background rate is constrained through direct measurement, assuming the presence of a negligible signal. With this approach, no excess of events over the background prediction is observed, setting a demonstrative lower bound on the n → n lifetime in 40Ar of τm 1.1 × 1026 years, and on the free n → n transition time of τn→n 2.6 × 105 s, each at the 90% confidence level. This analysis represents a first-ever proof-of-principle demonstration of the ability to search for this rare process in LArTPCs with high efficiency and low background.
AU - Abratenko,P
AU - Alterkait,O
AU - Andrade,Aldana D
AU - Arellano,L
AU - Asaadi,J
AU - Ashkenazi,A
AU - Balasubramanian,S
AU - Baller,B
AU - Barr,G
AU - Barrow,D
AU - Barrow,J
AU - Basque,V
AU - Benevides,Rodrigues O
AU - Berkman,S
AU - Bhanderi,A
AU - Bhat,A
AU - Bhattacharya,M
AU - Bishai,M
AU - Blake,A
AU - Bogart,B
AU - Bolton,T
AU - Book,JY
AU - Camilleri,L
AU - Cao,Y
AU - Caratelli,D
AU - Caro,Terrazas I
AU - Cavanna,F
AU - Cerati,G
AU - Chen,Y
AU - Conrad,JM
AU - Convery,M
AU - Cooper-Troendle,L
AU - Crespo-Anadón,JI
AU - Cross,R
AU - Del,Tutto M
AU - Dennis,SR
AU - Detje,P
AU - Devitt,A
AU - Diurba,R
AU - Djurcic,Z
AU - Dorrill,R
AU - Duffy,K
AU - Dytman,S
AU - Eberly,B
AU - Englezos,P
AU - Ereditato,A
AU - Evans,JJ
AU - Fine,R
AU - Finnerud,OG
AU - Fleming,BT
AU - Foreman,W
AU - Foppiani,N
AU - Franco,D
AU - Furmanski,AP
AU - Garcia-Gamez,D
AU - Gardiner,S
AU - Ge,G
AU - Gollapinni,S
AU - Goodwin,O
AU - Gramellini,E
AU - Green,P
AU - Greenlee,H
AU - Gu,W
AU - Guenette,R
AU - Guzowski,P
AU - Hagaman,L
AU - Hen,O
AU - Hicks,R
AU - Hilgenberg,C
AU - Horton-Smith,GA
AU - Imani,Z
AU - Irwin,B
AU - Itay,R
AU - James,C
AU - Ji,X
AU - Jiang,L
AU - Jo,JH
AU - Johnson,RA
AU - Jwa,YJ
AU - Kalra,D
AU - Kamp,N
AU - Karagiorgi,G
AU - Ketchum,W
AU - Kirby,M
AU - Kobilarcik,T
AU - Kreslo,I
AU - Lepetic,I
AU - Li,JY
AU - Li,K
AU - Li,Y
AU - Lin,K
AU - Littlejohn,BR
AU - Liu,H
AU - Louis,WC
AU - Luo,X
AU - Mariani,C
AU - Marsden,D
AU - Marshall,J
AU - Martinez,N
AU - Martinez,Caicedo DA
DO - 07/P07032
PY - 2024///
TI - First application of a liquid argon time projection chamber for the search for intranuclear neutron-antineutron transitions and annihilation in <sup>40</sup>Ar using the MicroBooNE detector
T2 - Journal of Instrumentation
UR - http://dx.doi.org/10.1088/1748-0221/19/07/P07032
VL - 19
ER -