Double parton scattering in $\bar{p}p$ collisions at $\sqrt{s} = 1.8 $TeV

A strong signal for double parton (DP) scattering is observed in a 16pb−1 sample of p¯p→γ/π0+3jets+X data from the CDF experiment at the Fermilab Tevatron. In DP events, two separate hard scatterings take place in a single p¯p collision. We isolate a large sample of data (∼14000events) of which 53% are found to be DP. The process-independent parameter of double parton scattering, σeff, is obtained without reference to theoretical calculations by comparing observed DP events to events with hard scatterings in separate p¯p collisions. The result σeff=(14.5±1.7−2.3+1.7)mb represents a significant improvement over previous measurements, and is used to constrain simple models of parton spatial density. The Feynman x dependence of σeff is investigated and none is apparent. Further, no evidence is found for kinematic correlations between the two scatterings in DP events.

13.85.Ni
14.20.Dh
12.38.Qk
13.87.Ce
anti-p p: colliding beams
anti-p p: inclusive reaction
photon: hadroproduction
pi0: hadroproduction
pi0: radiative decay
jet: associated production

References(16)

Figures(0)

Double {Drell-Yan} Annihilations in Hadron Collisions: Novel Tests of the Constituent Picture

- Phys.Rev.D 22 (1980) 2789
•
DOI:
- 10.1103/PhysRevD.22.2789

Multiparton Scattering and {QCD} Radiation as Sources of Four Jet Events

B. Humpert
(
- Lausanne U.
)
,
R. Odorico
(
- Bologna U. and
- INFN, Bologna
)

- Phys.Lett.B 154 (1985) 211,
- CERN Geneva - TH. 4050 (84,REC.JAN.85) 9p
•
DOI:
- 10.1016/0370-2693(85)90587-8

Possible Signature of Multiple Parton Interactions in Collider Four Jet Events

L. Ametller
(
- ICTP, Trieste
)
,
N. Paver
(
- Trieste U. and
- SISSA, Trieste
)
,
D. Treleani
(
- Trieste U.
)

- Phys.Lett.B 169 (1986) 289-292
•
DOI:
- 10.1016/0370-2693(86)90668-4

Double Parton Scattering in $p p$ Collisions at $\sqrt{s}=63$ -{GeV}

Axial Field Spectrometer

Collaboration

•

T. Åkesson
(
- CERN
)

et al.

- Z.Phys.C 34 (1987) 163
•
DOI:
- 10.1007/BF01566757

A Study of multi - jet events at the CERN anti-p p collider and a search for double parton scattering

UA2

Collaboration

•

J. Alitti
(
- IRFU, Saclay
)

et al.

- Phys.Lett.B 268 (1991) 145-154
•
DOI:
- 10.1016/0370-2693(91)90937-L

Study of four jet events and evidence for double parton interactions in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 47 (1993) 4857-4871,
- Phys. Rev. D47 (1993) 4857-4871. and Fermilab Batavia - FERMILAB-Pub-93-003 (93/01,rec.Nov.) 52 p. C
•
DOI:
- 10.1103/PhysRevD.47.4857

Signals for double parton scattering at the Fermilab Tevatron

Manuel Drees
(
- Wisconsin U., Madison
)
,
Tao Han
(
- UC, Davis
)

- Phys.Rev.Lett. 77 (1996) 4142-4145
•
e-Print:
- hep-ph/9605430
•
DOI:
- 10.1103/PhysRevLett.77.4142

The One Jet Inclusive Cross-section at Order $\alpha_{s}^{3}$ : Quarks and Gluons

Stephen D. Ellis
(
- Washington U., Seattle
)
,
Zoltan Kunszt
(
- Zurich, ETH
)
,
Davison E. Soper
(
- Oregon U.
)

- Phys.Rev.Lett. 64 (1990) 2121
•
DOI:
- 10.1103/PhysRevLett.64.2121

A Global QCD study of direct photon production

et al.

- Phys.Rev.D 51 (1995) 6139-6145
•
e-Print:
- hep-ph/9501230
•
DOI:
- 10.1103/PhysRevD.51.6139

The CDF Central Electromagnetic Calorimeter

CDF

Collaboration

•

L. Balka
(
- Argonne
)

et al.

- Nucl.Instrum.Meth.A 267 (1988) 272-279
•
DOI:
- 10.1016/0168-9002(88)90474-3

A Precision measurement of the prompt photon cross-section in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 73 (1994) 2662-2666,
- Phys.Rev.Lett. 74 (1995) 1891-1893 (erratum)
•
DOI:
- 10.1103/PhysRevLett.73.2662

- Phys.Rev.Lett. 74 1981

The Topology of three jet events in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 45 (1992) 1448-1458
•
DOI:
- 10.1103/PhysRevD.45.1448

High-energy physics event generation with PYTHIA 5.7 and JETSET 7.4

Torbjorn Sjostrand
(
- CERN
)

- Comput.Phys.Commun. 82 (1994) 74-90,
- CERN Geneva - TH. 7111 (93/12,rec.Jan.94) 17 p. and e: CERN th-7111-93
•
DOI:
- 10.1016/0010-4655(94)90132-5

Inclusive jet cross-section in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe

et al.

- Phys.Rev.Lett. 68 (1992) 1104-1108
•
DOI:
- 10.1103/PhysRevLett.68.1104

Measurement of the $\bar{p}p$ Total Cross-Section at $\sqrt{s} = 546$ GeV and 1800 GeV

CDF

Collaboration

•

F. Abe

et al.

- Phys.Rev.D 50 (1994) 5550-5561
•
DOI:
- 10.1103/PhysRevD.50.5550

Double parton scattering in pˉp\bar{p}ppˉ​p collisions at s=1.8\sqrt{s} = 1.8 s​=1.8TeV

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Double parton scattering in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV