# Study of charm production through e. mu. and eK correlations

## Abstract

On the basis of present knowledge of the weak decays of charmed mesons we build up inclusive lepton and kaon invariant decay distributions. These are used, in conjunction with the parent-child relation, to estimate the relative lepton and kaon signals arising from associated DD-bar production in hadronic collisions at large p/sub T/, assuming for the latter process an inverse power law p/sup -n//sub T/. Our results are presented as a function of n: for n = 8 we find a kaon yield some 20 times greater than that for an electron. e/sup + -/K/sup + -/ coincidences are therefore suggested as a charm signal, with e/sup + -/K/sup - +/ to be used as a background subtraction. We discuss to what extent the measured correlation of the decay products e..mu.. or eK can be used to retrieve those of the parent DD-bar. We derive a generalized Sternheimer relation for correlations and show how this can in principle be inverted by the use of the Mellin transform. In addition we propose a simple approximate inversion method which, for various typical functional forms, is shown to quantitatively reproduce the parent correlation.

- Authors:

- Publication Date:

- Research Org.:
- Physics Department, Imperial College, London, S.W.7., England

- OSTI Identifier:
- 6266466

- Resource Type:
- Journal Article

- Journal Name:
- Phys. Rev., D; (United States)

- Additional Journal Information:
- Journal Volume: 19:3

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHARMED MESON RESONANCES; PARTICLE PRODUCTION; SEMILEPTONIC DECAY; D RESONANCES; HADRON-HADRON INTERACTIONS; CORRELATIONS; COUPLING CONSTANTS; CROSS SECTIONS; ELECTRONS; ISOLATED VALUES; KAONS; MELLIN TRANSFORM; MUONS; PARTON MODEL; QUANTUM CHROMODYNAMICS; QUARK MODEL; THEORETICAL DATA; BOSONS; CHARM PARTICLES; COMPOSITE MODELS; DATA; DATA FORMS; DECAY; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRONS; INFORMATION; INTEGRAL TRANSFORMATIONS; INTERACTIONS; LEPTONS; MATHEMATICAL MODELS; MESON RESONANCES; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; POSTULATED PARTICLES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; RESONANCE PARTICLES; STRANGE PARTICLES; TRANSFORMATIONS; WEAK PARTICLE DECAY; 645203* - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties; 645204 - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties

### Citation Formats

```
Craigie, N.S., Jones, H.F., and Milani, P.
```*Study of charm production through e. mu. and eK correlations*. United States: N. p., 1979.
Web. doi:10.1103/PhysRevD.19.897.

```
Craigie, N.S., Jones, H.F., & Milani, P.
```*Study of charm production through e. mu. and eK correlations*. United States. doi:10.1103/PhysRevD.19.897.

```
Craigie, N.S., Jones, H.F., and Milani, P. Thu .
"Study of charm production through e. mu. and eK correlations". United States. doi:10.1103/PhysRevD.19.897.
```

```
@article{osti_6266466,
```

title = {Study of charm production through e. mu. and eK correlations},

author = {Craigie, N.S. and Jones, H.F. and Milani, P.},

abstractNote = {On the basis of present knowledge of the weak decays of charmed mesons we build up inclusive lepton and kaon invariant decay distributions. These are used, in conjunction with the parent-child relation, to estimate the relative lepton and kaon signals arising from associated DD-bar production in hadronic collisions at large p/sub T/, assuming for the latter process an inverse power law p/sup -n//sub T/. Our results are presented as a function of n: for n = 8 we find a kaon yield some 20 times greater than that for an electron. e/sup + -/K/sup + -/ coincidences are therefore suggested as a charm signal, with e/sup + -/K/sup - +/ to be used as a background subtraction. We discuss to what extent the measured correlation of the decay products e..mu.. or eK can be used to retrieve those of the parent DD-bar. We derive a generalized Sternheimer relation for correlations and show how this can in principle be inverted by the use of the Mellin transform. In addition we propose a simple approximate inversion method which, for various typical functional forms, is shown to quantitatively reproduce the parent correlation.},

doi = {10.1103/PhysRevD.19.897},

journal = {Phys. Rev., D; (United States)},

number = ,

volume = 19:3,

place = {United States},

year = {1979},

month = {2}

}