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**Physics Note****Published**

# **Helicity Formalism and Spin Effects**

**M. Anselmino; F. Caruso; Ugo Piovano**

1990

[**Download PDF **1.4 MB](https://index.cbpf.br/files/publicacao/6ad2a767639f62b11adbb6dd/pdf) [**Contact owner**](mailto:apub@cbpf.br?subject=Helicity%20Formalism%20and%20Spin%20Effects)

## **Publication details**

<dl>

<dt>Authors</dt>
<dd>M. Anselmino; F. Caruso; Ugo Piovano</dd>

<dt>Type</dt>
<dd>Physics Note</dd>

<dt>Status</dt>
<dd>Published</dd>

<dt>Publication date</dt>
<dd>1990</dd>

<dt>Description</dt>
<dd>The helicity formalism and the technique to compute amplitudes for interaction processes involving leptons, quarks, photons and gluons are reviewed. Explicit calculations and examples of exploitation of symmetry properties are shown. The formalism is then applied to the discussion of several hadronic processes and spin effects: the experimental data, when related to the properties of the elementary constituent interactions, show many not understood features. Also the "nucleon spin problem" is briefly reviewed.</dd>

<dt>Year</dt>
<dd>1990</dd>

<dt>Number</dt>
<dd>CBPF-NF-045/90</dd>

<dt>Linked to a thesis</dt>
<dd>No</dd>

<dt>Linked to a grant</dt>
<dd>No</dd>

</dl>

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