The n3He experiment: Hadronic parity violation in cold neutron capture on 3He

S. Baeßler; L. Barrón-Palos; N. Birge; J. D. Bowman; J. R. Calarco; T. V. Cianciolo; C. Coppola; C. Crawford; J. Favela; N. Fomin; I. Garishvili; C. Gautham; G. L. Greene; V. Gudkov; J. Hamblen; C. Hayes; L. Kabir; S. Kucuker; J. Martin; M. McCrea; P. Mueller; I. Novikov; C. Olguin; S. I. Penttilä; E. Plemons; M. Scott; P. N. Seo; Y. H. Song; A. Sprow; M. Schindler; J. Thomison; M. Viviani; J. Watts

The n3He experiment: Hadronic parity violation in cold neutron capture on 3He

S. Baeßler, L. Barrón-Palos, N. Birge, J. D. Bowman, J. R. Calarco, T. V. Cianciolo, C. Coppola, C. Crawford, J. Favela, N. Fomin, I. Garishvili, C. Gautham, G. L. Greene, V. Gudkov, J. Hamblen, C. Hayes, L. Kabir, S. Kucuker, J. Martin, M. McCreaP. Mueller, I. Novikov, C. Olguin, S. I. Penttilä, E. Plemons, M. Scott, P. N. Seo, Y. H. Song, A. Sprow, M. Schindler, J. Thomison, M. Viviani, J. Watts

Research output: Contribution to journal › Conference article › peer-review

Abstract

The n3He experiment aims to measure the parity violating asymmetry in the direction of proton emission in the reaction n→+ ³He → ³H →+ p, using the capture of polarized cold neutrons in an unpolarized gaseous 3He target. Using effective field theory based calculations, the size of the asymmetry is estimated to be in the range of (-10→2)×10^-8, depending on the framework in which the calculations are done, and our goal measurement accuracy is 2×10^-8. The asymmetry is a result of the low energy weak interaction between nucleons and its measurement will provide a benchmark for modern effective field theory calculations in the isospin = 0 channel. The exper- iment uses a ³He multiwire ionization chamber as the combined target and detector, operated in current mode. The n3He experiment was installed and commissioned in December 2014 on the Fundamental Neutron Physics Beamline at the Spallation Neutron Source at Oak Ridge National Laboratory. The experiment is currently taking production data. In this paper, we provide an overview of the experiment and will show a few preliminary results of the data collected to date.

Original language	English
Article number	102
Journal	Proceedings of Science
Volume	29-June-2015
State	Published - 2015
Event	8th International Workshop on Chiral Dynamics, CD 2015 - Pisa, Italy Duration: Jun 29 2015 → Jul 3 2015

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Baeßler, S., Barrón-Palos, L., Birge, N., Bowman, J. D., Calarco, J. R., Cianciolo, T. V., Coppola, C., Crawford, C., Favela, J., Fomin, N., Garishvili, I., Gautham, C., Greene, G. L., Gudkov, V., Hamblen, J., Hayes, C., Kabir, L., Kucuker, S., Martin, J., ... Watts, J. (2015). The n3He experiment: Hadronic parity violation in cold neutron capture on 3He. Proceedings of Science, 29-June-2015, Article 102.

@article{15a03b5be1364f909395b3dacff0f0bb,

title = "The n3He experiment: Hadronic parity violation in cold neutron capture on 3He",

abstract = "The n3He experiment aims to measure the parity violating asymmetry in the direction of proton emission in the reaction n→+ 3He → 3H →+ p, using the capture of polarized cold neutrons in an unpolarized gaseous 3He target. Using effective field theory based calculations, the size of the asymmetry is estimated to be in the range of (-10→2)×10-8, depending on the framework in which the calculations are done, and our goal measurement accuracy is 2×10-8. The asymmetry is a result of the low energy weak interaction between nucleons and its measurement will provide a benchmark for modern effective field theory calculations in the isospin = 0 channel. The exper- iment uses a 3He multiwire ionization chamber as the combined target and detector, operated in current mode. The n3He experiment was installed and commissioned in December 2014 on the Fundamental Neutron Physics Beamline at the Spallation Neutron Source at Oak Ridge National Laboratory. The experiment is currently taking production data. In this paper, we provide an overview of the experiment and will show a few preliminary results of the data collected to date.",

author = "S. Bae{\ss}ler and L. Barr{\'o}n-Palos and N. Birge and Bowman, {J. D.} and Calarco, {J. R.} and Cianciolo, {T. V.} and C. Coppola and C. Crawford and J. Favela and N. Fomin and I. Garishvili and C. Gautham and Greene, {G. L.} and V. Gudkov and J. Hamblen and C. Hayes and L. Kabir and S. Kucuker and J. Martin and M. McCrea and P. Mueller and I. Novikov and C. Olguin and Penttil{\"a}, {S. I.} and E. Plemons and M. Scott and Seo, {P. N.} and Song, {Y. H.} and A. Sprow and M. Schindler and J. Thomison and M. Viviani and J. Watts",

year = "2015",

language = "English",

volume = "29-June-2015",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab",

note = "8th International Workshop on Chiral Dynamics, CD 2015 ; Conference date: 29-06-2015 Through 03-07-2015",

}

Baeßler, S, Barrón-Palos, L, Birge, N, Bowman, JD, Calarco, JR, Cianciolo, TV, Coppola, C, Crawford, C, Favela, J, Fomin, N, Garishvili, I, Gautham, C, Greene, GL, Gudkov, V, Hamblen, J, Hayes, C, Kabir, L, Kucuker, S, Martin, J, McCrea, M, Mueller, P, Novikov, I, Olguin, C, Penttilä, SI, Plemons, E, Scott, M, Seo, PN, Song, YH, Sprow, A, Schindler, M, Thomison, J, Viviani, M & Watts, J 2015, 'The n3He experiment: Hadronic parity violation in cold neutron capture on 3He', Proceedings of Science, vol. 29-June-2015, 102.

TY - JOUR

T1 - The n3He experiment

T2 - 8th International Workshop on Chiral Dynamics, CD 2015

AU - Baeßler, S.

AU - Barrón-Palos, L.

AU - Birge, N.

AU - Bowman, J. D.

AU - Calarco, J. R.

AU - Cianciolo, T. V.

AU - Coppola, C.

AU - Crawford, C.

AU - Favela, J.

AU - Fomin, N.

AU - Garishvili, I.

AU - Gautham, C.

AU - Greene, G. L.

AU - Gudkov, V.

AU - Hamblen, J.

AU - Hayes, C.

AU - Kabir, L.

AU - Kucuker, S.

AU - Martin, J.

AU - McCrea, M.

AU - Mueller, P.

AU - Novikov, I.

AU - Olguin, C.

AU - Penttilä, S. I.

AU - Plemons, E.

AU - Scott, M.

AU - Seo, P. N.

AU - Song, Y. H.

AU - Sprow, A.

AU - Schindler, M.

AU - Thomison, J.

AU - Viviani, M.

AU - Watts, J.

PY - 2015

Y1 - 2015

N2 - The n3He experiment aims to measure the parity violating asymmetry in the direction of proton emission in the reaction n→+ 3He → 3H →+ p, using the capture of polarized cold neutrons in an unpolarized gaseous 3He target. Using effective field theory based calculations, the size of the asymmetry is estimated to be in the range of (-10→2)×10-8, depending on the framework in which the calculations are done, and our goal measurement accuracy is 2×10-8. The asymmetry is a result of the low energy weak interaction between nucleons and its measurement will provide a benchmark for modern effective field theory calculations in the isospin = 0 channel. The exper- iment uses a 3He multiwire ionization chamber as the combined target and detector, operated in current mode. The n3He experiment was installed and commissioned in December 2014 on the Fundamental Neutron Physics Beamline at the Spallation Neutron Source at Oak Ridge National Laboratory. The experiment is currently taking production data. In this paper, we provide an overview of the experiment and will show a few preliminary results of the data collected to date.

AB - The n3He experiment aims to measure the parity violating asymmetry in the direction of proton emission in the reaction n→+ 3He → 3H →+ p, using the capture of polarized cold neutrons in an unpolarized gaseous 3He target. Using effective field theory based calculations, the size of the asymmetry is estimated to be in the range of (-10→2)×10-8, depending on the framework in which the calculations are done, and our goal measurement accuracy is 2×10-8. The asymmetry is a result of the low energy weak interaction between nucleons and its measurement will provide a benchmark for modern effective field theory calculations in the isospin = 0 channel. The exper- iment uses a 3He multiwire ionization chamber as the combined target and detector, operated in current mode. The n3He experiment was installed and commissioned in December 2014 on the Fundamental Neutron Physics Beamline at the Spallation Neutron Source at Oak Ridge National Laboratory. The experiment is currently taking production data. In this paper, we provide an overview of the experiment and will show a few preliminary results of the data collected to date.

UR - http://www.scopus.com/inward/record.url?scp=84988729974&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:84988729974

SN - 1824-8039

VL - 29-June-2015

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 102

Y2 - 29 June 2015 through 3 July 2015

ER -

The n3He experiment: Hadronic parity violation in cold neutron capture on 3He

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