Limit on Tensor Currents from Li 8 β Decay

M. G. Sternberg; R. Segel; N. D. Scielzo; G. Savard; J. A. Clark; P. F. Bertone; F. Buchinger; M. Burkey; S. Caldwell; A. Chaudhuri; J. E. Crawford; C. M. Deibel; J. Greene; S. Gulick; D. Lascar; A. F. Levand; G. Li; A. Pérez Galván; K. S. Sharma; J. Van Schelt; R. M. Yee; B. J. Zabransky

doi:10.1103/PhysRevLett.115.182501

Limit on Tensor Currents from Li 8 β Decay

M. G. Sternberg, R. Segel, N. D. Scielzo^*, G. Savard, J. A. Clark, P. F. Bertone, F. Buchinger, M. Burkey, S. Caldwell, A. Chaudhuri, J. E. Crawford, C. M. Deibel, J. Greene, S. Gulick, D. Lascar, A. F. Levand, G. Li, A. Pérez Galván, K. S. Sharma, J. Van ScheltR. M. Yee, B. J. Zabransky

^*Corresponding author for this work

Physics and Astronomy

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Abstract

In the standard model, the weak interaction is formulated with a purely vector-axial-vector (V-A) structure. Without restriction on the chirality of the neutrino, the most general limits on tensor currents from nuclear β decay are dominated by a single measurement of the β-ν¯ correlation in He6 β decay dating back over a half century. In the present work, the β-ν¯-α correlation in the β decay of Li8 and subsequent α-particle breakup of the Be8∗ daughter was measured. The results are consistent with a purely V-A interaction and in the case of couplings to right-handed neutrinos (CT=-CT′) limits the tensor fraction to |CT/CA|2<0.011 (95.5% C.L.). The measurement confirms the He6 result using a different nuclear system and employing modern ion-trapping techniques subject to different systematic uncertainties.

Original language	English (US)
Article number	182501
Journal	Physical review letters
Volume	115
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.115.182501
State	Published - Oct 28 2015

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.115.182501

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Sternberg, M. G., Segel, R., Scielzo, N. D., Savard, G., Clark, J. A., Bertone, P. F., Buchinger, F., Burkey, M., Caldwell, S., Chaudhuri, A., Crawford, J. E., Deibel, C. M., Greene, J., Gulick, S., Lascar, D., Levand, A. F., Li, G., Pérez Galván, A., Sharma, K. S., ... Zabransky, B. J. (2015). Limit on Tensor Currents from Li 8 β Decay. Physical review letters, 115(18), [182501]. https://doi.org/10.1103/PhysRevLett.115.182501

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title = "Limit on Tensor Currents from Li 8 β Decay",

abstract = "In the standard model, the weak interaction is formulated with a purely vector-axial-vector (V-A) structure. Without restriction on the chirality of the neutrino, the most general limits on tensor currents from nuclear β decay are dominated by a single measurement of the β-ν¯ correlation in He6 β decay dating back over a half century. In the present work, the β-ν¯-α correlation in the β decay of Li8 and subsequent α-particle breakup of the Be8∗ daughter was measured. The results are consistent with a purely V-A interaction and in the case of couplings to right-handed neutrinos (CT=-CT′) limits the tensor fraction to |CT/CA|2<0.011 (95.5% C.L.). The measurement confirms the He6 result using a different nuclear system and employing modern ion-trapping techniques subject to different systematic uncertainties.",

author = "Sternberg, {M. G.} and R. Segel and Scielzo, {N. D.} and G. Savard and Clark, {J. A.} and Bertone, {P. F.} and F. Buchinger and M. Burkey and S. Caldwell and A. Chaudhuri and Crawford, {J. E.} and Deibel, {C. M.} and J. Greene and S. Gulick and D. Lascar and Levand, {A. F.} and G. Li and {P{\'e}rez Galv{\'a}n}, A. and Sharma, {K. S.} and {Van Schelt}, J. and Yee, {R. M.} and Zabransky, {B. J.}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society. {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = oct,

day = "28",

doi = "10.1103/PhysRevLett.115.182501",

language = "English (US)",

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Sternberg, MG, Segel, R, Scielzo, ND, Savard, G, Clark, JA, Bertone, PF, Buchinger, F, Burkey, M, Caldwell, S, Chaudhuri, A, Crawford, JE, Deibel, CM, Greene, J, Gulick, S, Lascar, D, Levand, AF, Li, G, Pérez Galván, A, Sharma, KS, Van Schelt, J, Yee, RM & Zabransky, BJ 2015, 'Limit on Tensor Currents from Li 8 β Decay', Physical review letters, vol. 115, no. 18, 182501. https://doi.org/10.1103/PhysRevLett.115.182501

TY - JOUR

T1 - Limit on Tensor Currents from Li 8 β Decay

AU - Sternberg, M. G.

AU - Segel, R.

AU - Scielzo, N. D.

AU - Savard, G.

AU - Clark, J. A.

AU - Bertone, P. F.

AU - Buchinger, F.

AU - Burkey, M.

AU - Caldwell, S.

AU - Chaudhuri, A.

AU - Crawford, J. E.

AU - Deibel, C. M.

AU - Greene, J.

AU - Gulick, S.

AU - Lascar, D.

AU - Levand, A. F.

AU - Li, G.

AU - Pérez Galván, A.

AU - Sharma, K. S.

AU - Van Schelt, J.

AU - Yee, R. M.

AU - Zabransky, B. J.

PY - 2015/10/28

Y1 - 2015/10/28

N2 - In the standard model, the weak interaction is formulated with a purely vector-axial-vector (V-A) structure. Without restriction on the chirality of the neutrino, the most general limits on tensor currents from nuclear β decay are dominated by a single measurement of the β-ν¯ correlation in He6 β decay dating back over a half century. In the present work, the β-ν¯-α correlation in the β decay of Li8 and subsequent α-particle breakup of the Be8∗ daughter was measured. The results are consistent with a purely V-A interaction and in the case of couplings to right-handed neutrinos (CT=-CT′) limits the tensor fraction to |CT/CA|2<0.011 (95.5% C.L.). The measurement confirms the He6 result using a different nuclear system and employing modern ion-trapping techniques subject to different systematic uncertainties.

AB - In the standard model, the weak interaction is formulated with a purely vector-axial-vector (V-A) structure. Without restriction on the chirality of the neutrino, the most general limits on tensor currents from nuclear β decay are dominated by a single measurement of the β-ν¯ correlation in He6 β decay dating back over a half century. In the present work, the β-ν¯-α correlation in the β decay of Li8 and subsequent α-particle breakup of the Be8∗ daughter was measured. The results are consistent with a purely V-A interaction and in the case of couplings to right-handed neutrinos (CT=-CT′) limits the tensor fraction to |CT/CA|2<0.011 (95.5% C.L.). The measurement confirms the He6 result using a different nuclear system and employing modern ion-trapping techniques subject to different systematic uncertainties.

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VL - 115

JO - Physical Review Letters

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Limit on Tensor Currents from Li 8 β Decay

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