Investigations of Lepton Interactions (Physics)
{'Code': '03010100', 'Directorate': {'Abbreviation': 'MPS', 'LongName': 'Direct For Mathematical & Physical Scien'}, 'Division': {'Abbreviation': 'PHY', 'LongName': 'Division Of Physics'}}
{'SignBlockName': 'Arthur Komar', 'PO_EMAI': None, 'PO_PHON': None}
Research will continue on the structure and decay of the                   positron-electron bound state positronium (Ps), and the                         interactions of positrons with matter.                                               Further tests will be made of quantum electrodynamics                      (QED) and the relativistic bound-state formalism by improving,                  by factors of 10 and 5, the recent precision measurements of                    the triplet and singlet Ps decay rates.  Other recent                           measurements of the fine-structure transitions of the excited                   state of Ps will be improved by a factor of 30.  These QED                      tests have wider implications, including impact upon quantum                    chromodynamics.  Also, a search will be made for CP violation                   in the leptonic Ps system by means of a search for the 23S1 &gt;                   21P1 transition by new techniques.                                                   Studies of interactions of spin-polarized positrons with                   optically active molecules will be continued.  Quantitative                     tests of an hypothesized casual connection between the                          dominance of                                                                    L-amino acids and D-sugars in living organisms and parity                       violation in the weak interaction will then be possible.  In a                  separate experiment positrons will be used to image materials.                       Continued development of intense, pulsed positron beams                    will be carried out.  The aim will be to produce the first                      antimatter                                                                      atom, antihydrogen.  The positron beams developed will benefit                  all aspects of research on Ps and positron interactions with                    matter.
[{'FirstName': 'Ralph', 'LastName': 'Conti', 'PI_MID_INIT': 'S', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Ralph S Conti', 'EmailAddress': None, 'NSF_ID': '000288634', 'StartDate': '06/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}, {'FirstName': 'Mark', 'LastName': 'Skalsey', 'PI_MID_INIT': 'A', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Mark A Skalsey', 'EmailAddress': None, 'NSF_ID': '000329899', 'StartDate': '06/15/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'David', 'LastName': 'Gidley', 'PI_MID_INIT': 'W', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'David W Gidley', 'EmailAddress': 'gidley@umich.edu', 'NSF_ID': '000329353', 'StartDate': '06/15/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}]
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[{'Code': '1241', 'Text': 'AMO Experiment/Atomic, Molecul'}, {'Code': '9120', 'Text': 'CROSS-DIRECTORATE PROGRAMS'}]
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