Higgs Production from Heavy Quarks

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