Search for CP violation in hyperon decays

Piotr Zyla; A. Chan; Y. C. Chen; C. Ho; P. K. Teng; W. S. Choong; G. Gidal; Y. Fu; P. Gu; T. Jones; K. B. Luk; B. Turko; P. Zyla; C. James; J. Volk; J. Felix; R. A. Burnstein; A. Chakrovorty; D. M. Kaplan; L. M. Lederman; W. Luebke; D. Rajaram; H. A. Rubin; N. Solomey; Y. Torun; C. G. White; S. L. White; N. Leros; J. P. Perroud; H. R. Gustafson; M. J. Longo; F. Lopez; H. K. Park; K. Clark; M. Jenkins; E. C. Dukes; C. Durandet; T. Holmstrom; M. Huang; L. Lu; K. S. Nelson

doi:10.1016/S0920-5632(02)01993-X

Search for CP violation in hyperon decays

Piotr Zyla^*, A. Chan, Y. C. Chen, C. Ho, P. K. Teng, W. S. Choong, G. Gidal, Y. Fu, P. Gu, T. Jones, K. B. Luk, B. Turko, P. Zyla^*, C. James, J. Volk, J. Felix, R. A. Burnstein, A. Chakrovorty, D. M. Kaplan, L. M. LedermanW. Luebke, D. Rajaram, H. A. Rubin, N. Solomey, Y. Torun, C. G. White, S. L. White, N. Leros, J. P. Perroud, H. R. Gustafson, M. J. Longo, F. Lopez, H. K. Park, K. Clark, M. Jenkins, E. C. Dukes, C. Durandet, T. Holmstrom, M. Huang, L. Lu, K. S. Nelson

^*Corresponding author for this work

HKUST Jockey Club Institute for Advanced Study

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

3 Citations (Scopus)

Abstract

Direct CP violation in nonleptonic hyperon decays can be established by comparing the decays of hyperons and anti-hyperons. For Ξ decay to Λπ followed by Λ to pπr, the proton distribution in the rest frame of Lambda is governed by the product of the decay parameters αΞα Λ. The asymmetry A_ΞΛ, proportional to the difference of αΞα_Λ of the hyperon and anti-hyperon decays, vanishes if CP is conserved. We report on an analysis of a fraction of 1997 and 1999 data collected by the HyperCP (E871) collaboration during the fixed-target runs at Fermilab. The preliminary measurement of the asymmetry is A_ΞΛ = [-7±12(stat)±6.2(sys)] × 10^-4, an order of magnitude better than,the present limit.

Original language	English
Pages (from-to)	242-245
Number of pages	4
Journal	Nuclear Physics B (Proceedings Supplements)
Volume	115
DOIs	https://doi.org/10.1016/S0920-5632(02)01993-X
Publication status	Published - Feb 2003

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Zyla, P., Chan, A., Chen, Y. C., Ho, C., Teng, P. K., Choong, W. S., Gidal, G., Fu, Y., Gu, P., Jones, T., Luk, K. B., Turko, B., Zyla, P., James, C., Volk, J., Felix, J., Burnstein, R. A., Chakrovorty, A., Kaplan, D. M., ... Nelson, K. S. (2003). Search for CP violation in hyperon decays. Nuclear Physics B (Proceedings Supplements), 115, 242-245. https://doi.org/10.1016/S0920-5632(02)01993-X

@article{30e9a0e6c3c84e3e95bcfcd047fe6d38,

title = "Search for CP violation in hyperon decays",

abstract = "Direct CP violation in nonleptonic hyperon decays can be established by comparing the decays of hyperons and anti-hyperons. For Ξ decay to Λπ followed by Λ to pπr, the proton distribution in the rest frame of Lambda is governed by the product of the decay parameters αΞα Λ. The asymmetry AΞΛ, proportional to the difference of αΞαΛ of the hyperon and anti-hyperon decays, vanishes if CP is conserved. We report on an analysis of a fraction of 1997 and 1999 data collected by the HyperCP (E871) collaboration during the fixed-target runs at Fermilab. The preliminary measurement of the asymmetry is AΞΛ = [-7±12(stat)±6.2(sys)] × 10-4, an order of magnitude better than,the present limit.",

author = "Piotr Zyla and A. Chan and Chen, \{Y. C.\} and C. Ho and Teng, \{P. K.\} and Choong, \{W. S.\} and G. Gidal and Y. Fu and P. Gu and T. Jones and Luk, \{K. B.\} and B. Turko and P. Zyla and C. James and J. Volk and J. Felix and Burnstein, \{R. A.\} and A. Chakrovorty and Kaplan, \{D. M.\} and Lederman, \{L. M.\} and W. Luebke and D. Rajaram and Rubin, \{H. A.\} and N. Solomey and Y. Torun and White, \{C. G.\} and White, \{S. L.\} and N. Leros and Perroud, \{J. P.\} and Gustafson, \{H. R.\} and Longo, \{M. J.\} and F. Lopez and Park, \{H. K.\} and K. Clark and M. Jenkins and Dukes, \{E. C.\} and C. Durandet and T. Holmstrom and M. Huang and L. Lu and Nelson, \{K. S.\}",

year = "2003",

month = feb,

doi = "10.1016/S0920-5632(02)01993-X",

language = "English",

volume = "115",

pages = "242--245",

journal = "Nuclear Physics B (Proceedings Supplements)",

issn = "0920-5632",

publisher = "Elsevier",

}

Zyla, P, Chan, A, Chen, YC, Ho, C, Teng, PK, Choong, WS, Gidal, G, Fu, Y, Gu, P, Jones, T, Luk, KB, Turko, B, Zyla, P, James, C, Volk, J, Felix, J, Burnstein, RA, Chakrovorty, A, Kaplan, DM, Lederman, LM, Luebke, W, Rajaram, D, Rubin, HA, Solomey, N, Torun, Y, White, CG, White, SL, Leros, N, Perroud, JP, Gustafson, HR, Longo, MJ, Lopez, F, Park, HK, Clark, K, Jenkins, M, Dukes, EC, Durandet, C, Holmstrom, T, Huang, M, Lu, L & Nelson, KS 2003, 'Search for CP violation in hyperon decays', Nuclear Physics B (Proceedings Supplements), vol. 115, pp. 242-245. https://doi.org/10.1016/S0920-5632(02)01993-X

TY - JOUR

T1 - Search for CP violation in hyperon decays

AU - Zyla, Piotr

AU - Chan, A.

AU - Chen, Y. C.

AU - Ho, C.

AU - Teng, P. K.

AU - Choong, W. S.

AU - Gidal, G.

AU - Fu, Y.

AU - Gu, P.

AU - Jones, T.

AU - Luk, K. B.

AU - Turko, B.

AU - Zyla, P.

AU - James, C.

AU - Volk, J.

AU - Felix, J.

AU - Burnstein, R. A.

AU - Chakrovorty, A.

AU - Kaplan, D. M.

AU - Lederman, L. M.

AU - Luebke, W.

AU - Rajaram, D.

AU - Rubin, H. A.

AU - Solomey, N.

AU - Torun, Y.

AU - White, C. G.

AU - White, S. L.

AU - Leros, N.

AU - Perroud, J. P.

AU - Gustafson, H. R.

AU - Longo, M. J.

AU - Lopez, F.

AU - Park, H. K.

AU - Clark, K.

AU - Jenkins, M.

AU - Dukes, E. C.

AU - Durandet, C.

AU - Holmstrom, T.

AU - Huang, M.

AU - Lu, L.

AU - Nelson, K. S.

PY - 2003/2

Y1 - 2003/2

N2 - Direct CP violation in nonleptonic hyperon decays can be established by comparing the decays of hyperons and anti-hyperons. For Ξ decay to Λπ followed by Λ to pπr, the proton distribution in the rest frame of Lambda is governed by the product of the decay parameters αΞα Λ. The asymmetry AΞΛ, proportional to the difference of αΞαΛ of the hyperon and anti-hyperon decays, vanishes if CP is conserved. We report on an analysis of a fraction of 1997 and 1999 data collected by the HyperCP (E871) collaboration during the fixed-target runs at Fermilab. The preliminary measurement of the asymmetry is AΞΛ = [-7±12(stat)±6.2(sys)] × 10-4, an order of magnitude better than,the present limit.

AB - Direct CP violation in nonleptonic hyperon decays can be established by comparing the decays of hyperons and anti-hyperons. For Ξ decay to Λπ followed by Λ to pπr, the proton distribution in the rest frame of Lambda is governed by the product of the decay parameters αΞα Λ. The asymmetry AΞΛ, proportional to the difference of αΞαΛ of the hyperon and anti-hyperon decays, vanishes if CP is conserved. We report on an analysis of a fraction of 1997 and 1999 data collected by the HyperCP (E871) collaboration during the fixed-target runs at Fermilab. The preliminary measurement of the asymmetry is AΞΛ = [-7±12(stat)±6.2(sys)] × 10-4, an order of magnitude better than,the present limit.

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:000181042400049

UR - https://openalex.org/W1525824100

UR - https://www.scopus.com/pages/publications/0042328288

U2 - 10.1016/S0920-5632(02)01993-X

DO - 10.1016/S0920-5632(02)01993-X

M3 - Journal Article

SN - 0920-5632

VL - 115

SP - 242

EP - 245

JO - Nuclear Physics B (Proceedings Supplements)

JF - Nuclear Physics B (Proceedings Supplements)

ER -

Search for CP violation in hyperon decays

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