Novel probe of charge symmetry breaking: Deuteron-induced deuteron breakup

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.48.2855· OSTI ID:5682441

Howell, C R; Felsher, P D; Tornow, W; Roberts, M L; Hanly, J M; Weisel, G J; Al Ohali, M; Walter, R L ^[1]; Slaus, I ^[2]; Lambert, J M; Treado, P A ^[3]; Mertens, G ^[4]

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1. Duke University and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308 (United States)
2. Rudjer Boskovic Institute, Zagreb, Croatia and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308 (United States)
3. Department of Physics, Georgetown University, Washington, D.C. 20057 (United States)
4. University of Tuebingen, Tuebingen (Germany)

The present paper identifies unique symmetry properties of the [ital [rvec d]]+[ital d][r arrow][ital d]+[ital p]+[ital n] breakup reaction that make it an excellent probe for studying charge-symmetry breaking. Measurements were made for two configurations of the ejected particles in the breakup reaction to obtain values of the spin observables [ital A][sub [ital y]], [ital A][sub [ital y][ital y]], and [ital A][sub [ital z][ital z]]. These observables are compared for the mirror reactions [sup 2]H([ital [rvec d]],[ital dp])[ital n] and [sup 2]H([ital [rvec d]],[ital dn])[ital p] for the two angle pairs ([theta][sub [ital d]],[phi][sub [ital d]],[theta][sub [ital N]],[phi][sub [ital N]])=(17.0[degree],0[degree],17.0[degree],180[degree]) and (17.0[degree],0[degree],34.5[degree],180[degree]) for an incident deutron energy of 12 MeV. In addition, spin observables for the [sup 2]H([ital [rvec d]],[ital pn])[ital d] reaction at [theta][sub [ital p]]=[theta][sub [ital n]] and [phi][sub [ital p]]=[phi][sub [ital n]]+180[degree] are shown to provide a particularly good test of charge symmetry. Our [ital A][sub [ital y]], [ital A][sub [ital y][ital y]], and [ital A][sub [ital z][ital z]] data for the [sup 2]H([ital [rvec d]],[ital pn])[ital d] reaction at ([theta][sub [ital p]],[phi][sub [ital p]],[theta][sub [ital n]],[phi][sub [ital n]])=(17.0[degree],0[degree],17.0[degree],180[degree]) are used to illustrate this latter point. Of the ten charge-symmetric sets of observables measured, two were found to differ by 2.5 standard deviations.

• DOE Contract Number: FG05-91ER40619
• OSTI ID: 5682441
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 48:6; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663440* -- D-
T-
& He-induced Reactions & Scattering-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
BARYONS
BEAMS
BREAKUP REACTIONS
C INVARIANCE
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DEUTERIUM TARGET
DEUTERON REACTIONS
DEUTERONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
INVARIANCE PRINCIPLES
MEV RANGE
MEV RANGE 10-100
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
POLARIZED BEAMS
PROTONS
SYMMETRY BREAKING
TARGETS