| 1. |
- Andersson, B., et al.
(författare)
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A semiclassical model for quark jet fragmentation
- 1979
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Ingår i: Zeitschrift für Physik C Particles and Fields. - 0170-9739. ; 1:1, s. 105-116
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Tidskriftsartikel (refereegranskat)abstract
- A semiclassical model is presented for the way the energy of a fast quark is transformed into observable hadrons. It reproduces the features of 1+1 dimensional QED (the Schwinger model) concerning a flat rapidity distribution in the central region. It also reproduces results from phenomenological considerations, which, based upon scaling, predict that meson formation in the fragmentation region can be described by an iterative scheme, implying a set of coupled integral equations. In particular the model predicts that the probability to find a meson containing the leading quark is independent of the Feynman scaling variable z. The iterative structure corresponds to a Brownian motion with relevance both to the confinement problems and to the distribution of mass in the quark jet.
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| 2. |
- Andersson, Bo, et al.
(författare)
-
Quark Jet Fragmentation
- 1979
-
Ingår i: Physica Scripta. - : IOP Publishing. - 0031-8949 .- 1402-4896. ; 19:2, s. 184-190
-
Tidskriftsartikel (refereegranskat)abstract
- A semiclassical model is presented for the way the energy of a fast quark is transformed into observable hadrons. It reproduces the features of 1 + 1 dimensional QED (the Schwinger model) concerning a flat rapidity distribution in the central region. In particular the model predicts that the probability to find a meson containing a leading quark is independent of the Feynman scaling variable. Also a quark jet interpretation of low PT jets in hadronic interactions is discussed shortly.
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| 3. |
- Hirsch, Jan M, et al.
(författare)
-
Periapical surgery
- 1979
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Ingår i: International journal of oral surgery. - 0300-9785. ; 8:3, s. 173-185
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Tidskriftsartikel (refereegranskat)abstract
- A retrospective study of 572 teeth treated with periapical surgery was undertaken in order to evaluate the influence of preoperative, operative and postoperative factors in the healing process as well as the operation method used. It was also the aim to assess whether the histophatological diagnosis of biopsies taken at the operation could be correlated to healing. Statistical analyses by the AID method and conventional cross-classification methods were performed. Factors of importance were found to be the extent of the destrucion, the operation method used, the bone surrounding the destruction, the quality of the orthograde root filling, the age of the patient, and the marginal bone buccally. The operation method was of importance in large destructions where root fillings were considered as not having properly sealed the canals, and when treating inflamed cysts. The histopathological diagnosis could not be ascribed any definite prognostic value.
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