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intrinsic. Higgs Production from Heavy Quarks. Iván Schmidt Universidad Federico Santa María (Chile) SILAFAE 2009. Outline. Higgs production. Intrinsic heavy quarks. Large production. Different production processes. Results. Conclusions. Unknown mass - PowerPoint PPT Presentation
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Higgs Production from Heavy QuarksHiggs Production from Heavy Quarks
Iván Schmidt Iván Schmidt
Universidad Federico Santa María Universidad Federico Santa María (Chile)(Chile)
SILAFAE 2009SILAFAE 2009
intrinsic
OutlineOutline
1. Higgs production.
2. Intrinsic heavy quarks.
3. Large production.
4. Different production processes.
5. Results.
6. Conclusions.
xF
Higgs detectionHiggs detection• Unknown mass
• Small production probability and large backgrounds
• Coupling ~ mass hard to observe in pp
Production at central rapidities
20
HH LF
px
s=
3 5(1 )HFx-- xF → 1
Heavy quarks in proton
Hc
c
F c cx x x large
p
Production at large
Reduce backgrounds from multiparticle production
HFx
But :1 2 ...p a qqq a qqqQQ
Small (1% probability for c)
~ 21/M
(compensated by fermion-Higgs coupling)
Large productionLarge productionFx
cc2) Perturbative (quantum fluctuation)
22
1cc
c
rm
c
c
1) Non-perturbative (stationary state)
2 2ccc mr 300 MeV
Experimentally: • DIS data, excess at large Bjx
• SELEX data Double-charm baryons Ξcc+
Possible processesPossible processes
Inclusive Higgs production
Semi-inclusive Higgs production
Exclusive diffractive Exclusive diffractive productionproduction
Inclusive productionInclusive production
p p p H pp p p H p
Large rapidity gap
Missing mass measurement
Final result• For LHC energy (14 TeV cm)
• Perturbative heavy flavors
• Includes absorptive corrections ( 20% at LHC)
• IT falls for GeV
• Heavy quark probability ~
2 350H tM m
2
1
QM
ConclusionsConclusions
Heavy quark components carry high momentum fractions.
Higgs production in fragmentation region.
Diffractive production
Also possible: , .
Difficult detection .
pp pHp
pp pHX pp HX
B. Kopeliovich
S. Brodsky
I. S.
Nucl. Phys. B807 (2009) 334
Gracias
Hope to see some of you in Chile in two years