Mikhail kosov 14 th geant4 users and collaboration workshop 2009
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Mikhail Kosov , 14 th Geant4 Users and Collaboration Workshop, 2009. Testing & improvement of inelastic p A, KA & anti-pA cross-sections. Introduction. The inelastic cross-sections are improved for the new one-model CHIPS physics list

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Mikhail kosov 14 th geant4 users and collaboration workshop 2009

Mikhail Kosov, 14th Geant4 Users and Collaboration Workshop, 2009

Testing & improvement of inelastic pA, KA & anti-pA cross-sections


Introduction
Introduction

The inelastic cross-sections are improved for the new one-model CHIPS physics list

The pA and nA cross-sections are already improved 2 years ago

CHIPS pA cross-sections are competitive with Barashenkov XS

The existing GEISHA K+A cross-sections are bad for CHIPS

CHIPS improvement of anti-pA cross-sections is significant

The main points of the improvement

Coulomb barrier for positive hadrons (p, p+, K+)

Melting of resonances at intermediate energies

Evolution of the cross-section minimum because of PPP vertex

Glauber calculation using CHIPS hA cross-sections (dashed)

Total to Inelastic Glauber reduction (sin/stot coefficient)


Chips parameterization of s in p a k a
CHIPS parameterization of sin (pA, K-A)

Parameterization of p-A and p+A inelastic cross-sections:

Parameterization of K-A inelastic cross-sections:


Preliminary chips fit for s in k a anti pa
Preliminary CHIPS fit for sin (K+A,anti-pA)

Parameterization of K+A inelastic cross-section:

Parameterization of anti-pA inelastic cross-section:


Conclusion
Conclusion

  • Now the updated CHIPS inelastic cross-section update is almost ready for the CHIPS Phys. List

  • The only scope to be covered is Hyperon-nuclear reactions for which there is no data: do similar to NA inelastic cross-sections with CHIPS Glauber

  • A lot should be done for elastic cross-sections fit, but now the strategy is different (w.r.t.``` NA): use sel(“ex”)=stot(ex)-sin(CHIPS)

  • In November 2009 the first one-model CHIPS physics list can be implemented for testing; the inelastic cross-sections is the first thing to test

  • Other G4 models can use CHIPS cross-sections


Thank you

Backup slides following


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