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en 1966 Eugene William Beier heavy leptons differential cherenkov counter Brookhaven national laboratory alternating gradient synchrotron beam particles A search for heavy leptons using a differential Cherenkov counter Dissertation / Thesis text Koester, L.J. Beier, Eugene William 2011-05-20T16:19:48Z 2011-05-20T16:19:48Z 10000-01-01 1966 A search for heavy leptons has been performed at the Brookhaven National Laboratory Alternating Gradient Synchrotron. Particular emphasis has been placed on the possible existence of leptons with mass slightly less than the K meson mass. The experiment used a high resolution differential Cherenkov counter to identify known beam particles and place upper limits on the abundance of other particles in the beam. The details of the design and performance of this Cherenkov counter are given. Heavy leptons of mass near the K meson mass were sought by looking for anomalous penetration of lead by particles identified as K mesons in the differential Cherenkov counter. The result is presented as the 95% confidence limit that there is no anomalous penetration of lead by K mesons. This limit is compared with an estimate of the number of. heavy leptons expected as a function of their mass and lifetime and under reasonable assumptions about their production. Total cross sections for 3.05 BeV/c rr- and K- and 4.60 BeV/c p interacting with lead are given. A summary of present limits on the existence of heavy leptons is presented. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-20T16:19:48Z No. of bitstreams: 1 1966_beier.pdf: 3175954 bytes, checksum: 6298955704e4bc96844b019f23371cc1 (MD5) Made available in DSpace on 2011-05-20T16:19:48Z (GMT). No. of bitstreams: 1 1966_beier.pdf: 3175954 bytes, checksum: 6298955704e4bc96844b019f23371cc1 (MD5) Previous issue date: 1966 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-05-20T16:19:48Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:13:28-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6179255 http://hdl.handle.net/2142/23987 Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.