Search for pair production of massive particles decaying into three quarks with the ATLAS detector in $\sqrt{s}=7$ TeV $pp$ collisions at the LHC

A search is conducted for hadronic three-body decays of a new massive coloured particle in sqrt(s) = 7 TeV pp collisions at the LHC using an integrated luminosity of 4.6/fb collected by the ATLAS detector. Supersymmetric gluino pair production in the context of a model with R-parity violation is used as a benchmark scenario. The analysis is divided into two search channels, each optimised separately for their sensitivity to high-mass and low-mass gluino production. The first search channel uses a stringent selection on the transverse momentum of the six leading jets and is performed as a counting experiment. The second search channel focuses on low-mass gluinos produced with a large boost. Large-radius jets are selected and the invariant mass of each of the two leading jets is used as a discriminant between the signal and the background. The results are found to be consistent with Standard Model expectations and limits are set on the allowed gluino mass.

Note:

28 pages plus author list (50 pages total), 6 figures, 7 tables, submitted to JHEP, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2012-16/

p p: scattering
postulated particle: pair production
gluino: pair production
gluino: mass: lower limit
R parity: violation
CERN LHC Coll
ATLAS
jet: transverse momentum
jet: mass
supersymmetry

References(83)

Figures(13)

[1]

Baryon Number Changing Currents

H. Miyazawa
(
- Argonne (main) and
- Tokyo U.
)

- Prog.Theor.Phys. 36 (1966) 6, 1266-1276
•
DOI:
- 10.1143/PTP.36.1266

[2]

Dual Theory for Free Fermions

Pierre Ramond
(
- Fermilab
)

- Phys.Rev.D 3 (1971) 2415-2418
•
DOI:
- 10.1103/PhysRevD.3.2415

[3]

Extension of the Algebra of Poincare Group Generators and Violation of p Invariance

Yu.A. Golfand
(
- Lebedev Inst.
)
,
E.P. Likhtman
(
- Lebedev Inst.
)

- JETP Lett. 13 (1971) 323-326,
- Pisma Zh.Eksp.Teor.Fiz. 13 (1971) 452-455,
•
DOI:
- 10.1142/9789814542340_0001

[4]

Factorizable dual model of pions

A. Neveu
(
- Princeton U.
)
,
J.H. Schwarz
(
- Princeton U.
)

- Nucl.Phys.B 31 (1971) 86-112
•
DOI:
- 10.1016/0550-3213(71)90448-2

[5]

Quark Model of Dual Pions

A. Neveu
(
- Princeton U.
)
,
J.H. Schwarz
(
- Princeton U.
)

- Phys.Rev.D 4 (1971) 1109-1111,
- In *Schwarz, J.H. (ed.): Superstrings, Vol. 1*, 84-86
•
DOI:
- 10.1103/PhysRevD.4.1109

[6]

Field Theory Interpretation of Supergauges in Dual Models

Jean-Loup Gervais
(
- Orsay, LPT and
- IHES, Bures-sur-Yvette
)
,
B. Sakita
(
- Orsay, LPT and
- IHES, Bures-sur-Yvette
)

- Nucl.Phys.B 34 (1971) 632-639,
- In *Schwarz, J.H. (ed.): Superstrings, Vol. 1*, 248-255,
•
DOI:
- 10.1016/0550-3213(71)90351-8

[7]

Is the Neutrino a Goldstone Particle?

D.V. Volkov
(
- Kharkov, KIPT
)
,
V.P. Akulov
(
- Kharkov, KIPT
)

- Phys.Lett.B 46 (1973) 109-110,
- also in *FERRARA, S. (ED.): SUPERSYMMETRY, VOL. 1*, 11-12
•
DOI:
- 10.1016/0370-2693(73)90490-5

[8]

A Lagrangian Model Invariant Under Supergauge Transformations

J. Wess
(
- Karlsruhe U.
)
,
B. Zumino
(
- CERN
)

- Phys.Lett.B 49 (1974) 52,
- IN *FERRARA, S. (ED.): SUPERSYMMETRY, VOL. 1*, 77-79. (PHYS. LETT. B49 (1974) 52-54) AND CERN GENEVA - TH. 1794 (83,REC.JAN.74) 9 P. (SEE BOOK INDEX)
•
DOI:
- 10.1016/0370-2693(74)90578-4

[9]

Supergauge Transformations in Four-Dimensions

J. Wess
(
- Karlsruhe U.
)
,
B. Zumino
(
- CERN
)

- Nucl.Phys.B 70 (1974) 39-50,
- In *Ferrara, S. (ed.): Supersymmetry, Vol. 1*, 13-24,
•
DOI:
- 10.1016/0550-3213(74)90355-1

[10]

Softly Broken Supersymmetry and SU(5)

Savas Dimopoulos
(
- Stanford U., ITP and
- Santa Barbara, KITP and
- Michigan U.
)
,
Howard Georgi
(
- Harvard U.
)

- Nucl.Phys.B 193 (1981) 150-162
•
DOI:
- 10.1016/0550-3213(81)90522-8

[11]

Dynamical Breaking of Supersymmetry

Edward Witten
(
- Princeton U.
)

- Nucl.Phys.B 188 (1981) 513,
- IN *FERRARA, S. (ED.): SUPERSYMMETRY, VOL. 1*, 443-484. (NUCL. PHYS. B188 (1981) 513-554) AND PREPRINT - WITTEN, E. (REC.JUL.81) 72 P. (SEE BOOK INDEX)
•
DOI:
- 10.1016/0550-3213(81)90006-7