Study of the ABC enhancement in the polarized d d ---> alpha X**0 reaction - INSPIRE

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Study of the ABC enhancement in the polarized d d ---> alpha X**0 reaction

R. Wurzinger
(
- Orsay, IPN and
- Saclay
)
,
O. Bing
(
- Strasbourg, CRN
)
,
M. Boivin
(
- Saclay
)
,
P. Courtat
(
- Orsay, IPN
)
,
G. Faldt
(
- Uppsala U.
)

Oct, 1998

10 pages

Published in:

Phys.Lett.B 445 (1999) 423-427

e-Print:

nucl-ex/9810010 [nucl-ex]

DOI:

10.1016/S0370-2693(98)01464-6

Report number:

TSL-ISV-98-0197

Experiments:

SATURNE

View in:

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Abstract:

The polarized d d -> alpha X reaction at beam energies close to the eta threshold shows very strong structure in the missing mass corresponding to the ABC enhancement. The deuteron tensor analysing power A_yy, and the slope of the vector analysing power A_y with respect to angle, have been measured for this reaction around the forward direction. Both signals are small, and their variations with the alpha-particle momentum are in broad agreement with a theoretical model in which each pair of nucleons in the projectile and target deuterons undergoes pion production through the NN -> d pi reaction.

Note:

LaTeX2e, 10 pages, 3 eps figures, submitted to Physics Letters B Report-no: TSL/ISV-98-0197

deuteron deuteron: nuclear reaction
helium: hadroproduction
deuteron: polarized beam
neutral particle: associated production
eta: threshold
mass spectrum: missing-mass
analyzing power: tensor
analyzing power: slope
momentum dependence
p n: initial-state interaction

References(17)

Figures(0)

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