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Publication Information
| Title | Direct Measurements of the Lifetime of Heavy Hypernuclei | ||||
| Abstract | The lifetime of a Lambda particle embedded in a nucleus (hypernucleus) decreases from that of free Lambda decay due to the opening of the Lambda N to NN weak decay channel. However, it is generally believed that the lifetime of a hypernucleus attains a constant value (saturation) for medium to heavy hypernuclear masses, yet this hypothesis has been difficult to verify. The present paper reports a direct measurement of the lifetime of medium-heavy hypernuclei produced with a photon-beam from Fe, Cu, Ag, and Bi targets. The recoiling hypernuclei were detected by a fission fragment detector using low-pressure multi-wire proportional chambers. The experiment agrees remarkably well with the only previously-measured single-species heavy-hypernucleus lifetime, that of Fe56_Lambda at KEK, and has significantly higher precision. The experiment disagrees with the measured lifetime of an unknown combination of heavy hypernuclei with 180<A<225 and, with a small statistical and systematic uncertain | ||||
| Author(s) | Xiyu Qiu, Liguang Tang, Amur Margaryan, Patrick Achenbach, Abdellah Ahmidouch, Ibrahim Albayrak, Darko Androic, Arshak Asaturyan, Razmik Asaturyan, Ozgur Ates, Rafael Badui, Pavlo Baturin, Werner Boeglin, Jason Bono, Ed Brash, Phil Carter, Chunhua Chen, X. Chen, Atsushi Chiba, Eric Christy, Mark Macrae Dalton, Sam Danagoulian, Raffaele De Leo, Daisuke Doi, Mostafa Elaasar, Rolf Ent, Howard Fenker, Yu Fujii, Miroslav Furic, Marianna Gabrielyan, Liping Gan, Franco Garibaldi, Dave Gaskell, Ashot Gasparian, Toshiyuki Gogami, Osamu Hashimoto, Tanja Horn, Bitao Hu, Ed Hungerford, Mark Kevin Jones, Hiroki Kanda, M. Kaneta, Masaharu Kawai, Daisuke Kawama, Hari Khanal, Michael Kohl, A. Liyanage, Wei Luo, Kazushige Maeda, Pete Markowitz, Tomofumi Maruta, Akihiko Matsumura, Victor Maxwell, Arthur Mkrtchyan, Hamlet Mkrtchyan, Sho Nagao, S. Nakamura, Amrendra Narayan, Casey Neville, Gabriel Niculescu, Maria Niculescu, Angel Nunez, Nuruzzaman Nuruzzaman, Yuichi Okayasu, Tomislav Petkovic, J. Pochodzalla, Joerg Reinhold, Victor Rodriguez, Chhanda Samanta, Brad Sawatzky, Tomislav Seva, Ayako Shichijo, Vardan Tadevosyan, Naotaka Taniya, Kyo Tsukada, Micah Veilleux, William Vulcan, Frank Wesselmann, Stephen Wood, L. Ya, Taku Yamamoto, Zhenyu Ye, Kosuke Yokota, Lulin Yuan, Simon Zhamkochyan, Lingyan Zhu | ||||
| Publication Date | May 2018 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Experimental Halls / Hall C | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | Yes | ||||
| Experiment Number(s) |
E02-017
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| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Nuclear Physics A |
| Refereed | Yes |
| Volume | 973 |
| Issue | |
| Page(s) | 116-148 |
Attachments/Datasets/DOI Link
| Document(s) |
1212.1133v2.pdf
(STI Document)
JLAB-PHY-12-1674.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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