Hints of new physics in the decay: E+ -+ pµ+µ-

HyperCP collaboration

Hints of new physics in the decay: E⁺ -+ pµ⁺µ-

HyperCP collaboration

Research output: Contribution to conference › Conference Paper › peer-review

Abstract

The HyperCP (E871) experiment collected -10⁹ hyperon decays in the 1997 and 1999 Fermilab fixed-target running periods. Using the data from the 1999 run, we report on the observation of three isolated events with reconstructed masses consistent with the hypothesis E+ - pµ⁺µ-. This is the rarest baryon decay ever observed. The dimuon mass distribution is unexpectedly narrow, suggesting the decay may proceed via an intermediate state of mass 214.3±0.5 MeV/c2. This state is consistent with a short-lived pseudoscalar sgoldstino with parity-conserving interactions decaying into two unlike-sign muons.

Original language	English
Pages	85-89
Number of pages	5
Publication status	Published - 2006
Externally published	Yes
Event	41st Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2006 - La Thuile, Italy Duration: 11 Mar 2006 → 18 Mar 2006

Conference

Conference	41st Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2006
Country/Territory	Italy
City	La Thuile
Period	11/03/06 → 18/03/06

Bibliographical note

Publisher Copyright:
© Proceedings of the 41st Rencontres de Moriond - 2006 Electroweak Interactions and Unified Theories, EW 2006.

Cite this

@conference{ca8b8a0b3425478bbca3b82b0ff3e8d5,

title = "Hints of new physics in the decay: E+ -+ pµ+µ-",

abstract = "The HyperCP (E871) experiment collected -109 hyperon decays in the 1997 and 1999 Fermilab fixed-target running periods. Using the data from the 1999 run, we report on the observation of three isolated events with reconstructed masses consistent with the hypothesis E+ - pµ+µ-. This is the rarest baryon decay ever observed. The dimuon mass distribution is unexpectedly narrow, suggesting the decay may proceed via an intermediate state of mass 214.3±0.5 MeV/c2. This state is consistent with a short-lived pseudoscalar sgoldstino with parity-conserving interactions decaying into two unlike-sign muons.",

author = "\{HyperCP collaboration\} and \{Craig Dukes\}, E. and Chen, \{Y. C.\} and Choong, \{W. S.\} and G. Gidal and Y. Fu and T. Jones and Luk, \{K. B.\} and P. Zyla and C. James and J. Volk and J. Felix and Burnstein, \{R. A.\} and A. Chakravorty and Kaplan, \{D. M.\} and Lederman, \{L. M.\} and W. Luebke and D. Rajaram and Rubin, \{H. A.\} 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 Jenkins, \{C. M.\} and Dukes, \{E. C.\} and C. Durandet and T. Holmstrom and M. Huang and Lu, \{L. C.\} and Nelson, \{K. S.\}",

note = "Publisher Copyright: {\textcopyright} Proceedings of the 41st Rencontres de Moriond - 2006 Electroweak Interactions and Unified Theories, EW 2006.; 41st Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2006 ; Conference date: 11-03-2006 Through 18-03-2006",

year = "2006",

language = "English",

pages = "85--89",

}

TY - CONF

T1 - Hints of new physics in the decay

T2 - 41st Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2006

AU - HyperCP collaboration

AU - Craig Dukes, E.

AU - Chen, Y. C.

AU - Choong, W. S.

AU - Gidal, G.

AU - Fu, Y.

AU - Jones, T.

AU - Luk, K. B.

AU - Zyla, P.

AU - James, C.

AU - Volk, J.

AU - Felix, J.

AU - Burnstein, R. A.

AU - Chakravorty, A.

AU - Kaplan, D. M.

AU - Lederman, L. M.

AU - Luebke, W.

AU - Rajaram, D.

AU - Rubin, H. A.

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, C. M.

AU - Dukes, E. C.

AU - Durandet, C.

AU - Holmstrom, T.

AU - Huang, M.

AU - Lu, L. C.

AU - Nelson, K. S.

N1 - Publisher Copyright: © Proceedings of the 41st Rencontres de Moriond - 2006 Electroweak Interactions and Unified Theories, EW 2006.

PY - 2006

Y1 - 2006

N2 - The HyperCP (E871) experiment collected -109 hyperon decays in the 1997 and 1999 Fermilab fixed-target running periods. Using the data from the 1999 run, we report on the observation of three isolated events with reconstructed masses consistent with the hypothesis E+ - pµ+µ-. This is the rarest baryon decay ever observed. The dimuon mass distribution is unexpectedly narrow, suggesting the decay may proceed via an intermediate state of mass 214.3±0.5 MeV/c2. This state is consistent with a short-lived pseudoscalar sgoldstino with parity-conserving interactions decaying into two unlike-sign muons.

AB - The HyperCP (E871) experiment collected -109 hyperon decays in the 1997 and 1999 Fermilab fixed-target running periods. Using the data from the 1999 run, we report on the observation of three isolated events with reconstructed masses consistent with the hypothesis E+ - pµ+µ-. This is the rarest baryon decay ever observed. The dimuon mass distribution is unexpectedly narrow, suggesting the decay may proceed via an intermediate state of mass 214.3±0.5 MeV/c2. This state is consistent with a short-lived pseudoscalar sgoldstino with parity-conserving interactions decaying into two unlike-sign muons.

UR - https://www.scopus.com/pages/publications/85088696407

M3 - Conference Paper

AN - SCOPUS:85088696407

SP - 85

EP - 89

Y2 - 11 March 2006 through 18 March 2006

ER -

Hints of new physics in the decay: E⁺ -+ pµ⁺µ-

Abstract

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