A new design of a polarized target for the test of time reversal invariance in a neutron transmission experiment

1994 ◽  
Vol 326 (1-2) ◽  
pp. 27-30 ◽  
Author(s):  
Y. Takahashi ◽  
H.M. Shimizu ◽  
T. Maekawa ◽  
T. Yabuzaki
Keyword(s):  
Time Reversal ◽  
Time Reversal Invariance ◽  
Transmission Experiment ◽  
Neutron Transmission ◽  
Polarized Target ◽  
Reversal Invariance

scholarly journals Test of Time-Reversal Invariance at COSY (TRIC)

2016 ◽  
Vol 40 ◽  
pp. 1660079
Author(s):  
D. Eversheim ◽  
Yu. Valdau ◽  
B. Lorentz
Keyword(s):  
Proton Beam ◽  
Time Reversal ◽  
Reaction Rate ◽  
Time Reversal Invariance ◽  
Deuteron Target ◽  
Beam Source ◽  
Transmission Experiment ◽  
Forward Spectrometer ◽  
Polarized Proton ◽  
Reversal Invariance

At the Cooler Synchrotron COSY a novel (P-even, T-odd) null test of time-reversal invariance to an accuracy of 10[Formula: see text] is planned as an internal target transmission experiment. The parity conserving time-reversal violating observable is the total cross-section asymmetry A[Formula: see text]. This quantity is measured using a polarized proton beam with an energy of 135 MeV and an internal tensor polarized deuteron target from the PAX atomic beam source. The reaction rate will be determined by the lifetime of the beam. Consequently, the accuracy of the current measurement of the circulating proton beam is crucial for this experiment. Thus, the cooler synchroton ring serves as an ideal forward spectrometer, as a detector, and an accelerator.

scholarly journals The H and D Polarized Target for Spin–Filtering Measurements at COSY

2016 ◽  
Vol 40 ◽  
pp. 1660149
Author(s):  
Giuseppe Ciullo ◽  
Marco Statera ◽  
Paolo Lenisa ◽  
Alexander Nass ◽  
Giuseppe Tagliente
Keyword(s):  
Cross Section ◽  
Time Reversal ◽  
Testing Time ◽  
Time Reversal Invariance ◽  
Polarized Target ◽  
Reversal Invariance ◽  
Polarized Targets ◽  
Main Frame ◽  
Spin Filtering

In the main frame of the PAX (Polarized Antiproton eXperiments) collaboration, which engaged the challenging purpose of polarizing antiproton beams, the possibility to have H or D polarized targets requires a daily switchable source and its diagnostics: mainly change is a dual cavity tunable for H and D. The commissioning of PAX has been fullfilled, for the transverse case, on the COSY (COoler SYnchrotron) proton ring, achieving milestones on spin–dependent cross–section measurements. Now the longitudinal case could provide sensitive polarization results. An H or D source allows the exploration of the spin–filtering process with a deuterium polarized target, and opens new chances for testing Time Reversal Invariance at COSY (TRIC).

scholarly journals DIRECT TEST OF TIME REVERSAL INVARIANCE VIOLATION IN B-MESONS

2008 ◽  
Vol 23 (25) ◽  
pp. 2085-2091 ◽  
Author(s):  
EZEQUIEL ÁLVAREZ ◽  
ALEJANDRO SZYNKMAN
Keyword(s):  
B Mesons ◽  
Time Reversal ◽  
B Meson ◽  
Experimental Information ◽  
Time Reversal Invariance ◽  
Cpt Invariance ◽  
Invariance Violation ◽  
Mean Lifetime ◽  
Reversal Invariance ◽  
Model Independent

In this letter we reinterpret and reanalyze the available data of the B-meson factories showing the existence of direct experimental evidence of time reversal invariance violation in B-mesons. This reinterpretation consists of using the available observables to define a new observable which, in a model-independent way and without assuming CPT invariance, compares a transition between a B0 and a here-defined Bα-state, with its time reversed transition. The observable then offers a direct way to probe time reversal invariance and it is therefore independent of any conclusion obtained from current experimental information on CP violation and CPT invariance. As far as we are concerned, this is the first direct evidence of time reversal invariance violation in B-mesons and also the first one obtained from decaying particles whose mean lifetime difference is negligible.

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