Diffraction in FTF model
V. Uzhinsky, 23 May 2012
1. Determination of cross sections, M2x/s < 0.05
2. Kinky string at the diffraction
3. Sampling of mass in non-diffractive events, dW = (0.5/P + 0.5) dP
4. Change of s-sbar pair creation probability
5. Change of qq-qqbar creation probability
6. Description of pp- and pA-data
7. There is no need to change diffraction in p+A reactions!?
1
What is the diffraction?
G
G
G
G
R
P
G
P
P
P
1/M3
P
1/M2
2
Fritiof
3
Estimation of the cross section
4
Fragmentation of diffractive strings, sqrt(s)=546 GeV
5
Fragmentation of diffractive strings
6
Diffraction for Totem experiment
7
Properties of PP interactions
Sampling of mass in non-diffractive events, dW = (0.5/P + 0.5) dP
8
Properties of PP interactions
9
Change of s-sbar pair creation probability (it was large!)
10
Change of s-sbar pair creation probability
11
Change of qq-qqbar creation probability
12
Description of CERN-SPS data on pA->pX, 120 GeV/c
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Description of BNL data on pA->pX, 12 and 19 GeV/c
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Description of MIPP data, 58 GeV/c
15
Description of MIPP data, 84 and 120 GeV/c
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Description of NA49 data on p+C at 158 GeV/c
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Description of data on pA interactions at 100 GeV/c
J.J. Whitmore et al., Z. Phys. C 62, 199-227 (1994)
Insufficient meson production in the target fragmentation region!
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Description of NA61 data on p+C at 31 GeV/c
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Conclusion
Baryon diffraction is essential improved in FTF!
1. Phenomenological parameterization of the
diffraction cross sections is found.
2. Diffractive strings are not kinky strings!
3. Results of FTF at low energies are saved.
4. New string mass distribution in NSD is proposed.
5. s-sbar pair creation probability and qq-qqbar
creation probability are tuned.
6. The model works quite well for pp-interactions.
7. There is a problem with description of pAinteractions!
Plans
Solution of the pA problem. Look for pion and kaon diffraction.
Description of the model, 1 – 2 months.
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