Heavy flavor properties of jets produced in $p \bar{p}$ interactions at $\sqrt{s}$ = 1.8-TeV

We present a detailed examination of the heavy flavor properties of jets produced at the Fermilab Tevatron collider. The data set, collected with the Collider Detector at Fermilab, consists of events with two or more jets with transverse energy

E_T \geq 15

GeV and pseudo-rapidity

|\eta| \leq 1.5

. The heavy flavor content of the data set is enriched by requiring that at least one of the jets (lepton-jet) contains a lepton with transverse momentum larger than 8 GeV/c. Jets containing hadrons with heavy flavor are selected via the identification of secondary vertices. The parton-level cross sections predicted by the {\sc herwig} Monte Carlo generator program are tuned within theoretical and experimental uncertainties to reproduce the secondary-vertex rates in the data. The tuned simulation provides new information on the origin of the discrepancy between the

b\bar{b}

cross section measurements at the Tevatron and the next-to-leading order QCD prediction. We also compare the rate of away-jets (jets recoiling against the lepton-jet) containing a soft lepton (

p_T \geq 2

GeV/c) in the data to that in the tuned simulation. We find that this rate is larger than what is expected for the conventional production and semileptonic decay of pairs of hadrons with heavy flavor.

Note:

65 pages, 14 tables, 14 figures. To be submitted to Phys. Rev. D Report-no: FERMILAB-Pub-03/382-E

13.20.He
13.85.Qk
13.20.Fc
anti-p p: colliding beams
anti-p p: inclusive reaction
jet: multiple production
transverse energy: high
heavy quark
quark: pair production
quark: semileptonic decay

References(41)

Figures(0)

Study of the Heavy Flavor Content of Jets Produced in Association with W Bosons in $p\bar{p}$ Collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

D. Acosta
(
- Florida U.
)

et al.

- Phys.Rev.D 65 (2002) 052007
•
e-Print:
- hep-ex/0109012
•
DOI:
- 10.1103/PhysRevD.65.052007

The One Particle Inclusive Differential Cross-Section for Heavy Quark Production in Hadronic Collisions

- Nucl.Phys.B 327 (1989) 49-92,
- Nucl.Phys.B 335 (1990) 260-260 (erratum)
•
DOI:
- 10.1016/0550-3213(89)90286-1

Low-energy supersymmetry and the Tevatron bottom quark cross-section

Edmond L. Berger
(
- Argonne
)
,
B.W. Harris
(
- Argonne
)
,
D.E. Kaplan
(
- Argonne and
- Chicago U., EFI
)
,
Z. Sullivan
(
- Argonne
)
,
Timothy M.P. Tait
(
- Argonne
)

et al.

- Phys.Rev.Lett. 86 (2001) 4231-4234
•
e-Print:
- hep-ph/0012001
•
DOI:
- 10.1103/PhysRevLett.86.4231

$B$ production asymmetries in perturbative QCD

- Phys.Rev.D 66 (2002) 034003
•
e-Print:
- hep-ph/0108201
•
DOI:
- 10.1103/PhysRevD.66.034003

Measurement of correlated $\mu - \bar{b}$ jet cross-sections in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe

et al.

- Phys.Rev.D 53 (1996) 1051-1065
•
e-Print:
- hep-ex/9508017
•
DOI:
- 10.1103/PhysRevD.53.1051

Measurement of $b\bar{b}$ production correlations, $B^0 \overline{B}^0$ mixing, and a limit on epsilon(B) in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 55 (1997) 2546-2558
•
DOI:
- 10.1103/PhysRevD.55.2546

The $b\bar{b}$ production cross section and angular correlations in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

D0

Collaboration

•

B. Abbott

et al.

- Phys.Lett.B 487 (2000) 264-272
•
e-Print:
- hep-ex/9905024
•
DOI:
- 10.1016/S0370-2693(00)00844-3

Heavy quark correlations in hadron collisions at next-to-leading order

Michelangelo L. Mangano
(
- INFN, Pisa and
- Pisa, Scuola Normale Superiore
)
,
Paolo Nason
(
- INFN, Parma
)
,
Giovanni Ridolfi
(
- INFN, Genoa
)

- Nucl.Phys.B 373 (1992) 295-345
•
DOI:
- 10.1016/0550-3213(92)90435-E

Heavy quark production

- Adv.Ser.Direct.High Energy Phys. 15 (1998) 609-706,
•
e-Print:
- hep-ph/9702287
•
DOI:
- 10.1142/9789812812667_0009

Unintegrated parton densities applied to heavy quark production in the CCFM approach

Hannes Jung
(
- Lund U.
)

- J.Phys.G 28 (2002) 971-982
•
e-Print:
- hep-ph/0109146
•
DOI:
- 10.1088/0954-3899/28/5/320

- Phys.Rept.C 117 76

Spin 0 Quarks in $e^+ e^-$ Annihilation

Chiara R. Nappi
(
- Princeton, Inst. Advanced Study
)

- Phys.Rev.D 25 (1982) 84
•
DOI:
- 10.1103/PhysRevD.25.84

Do electroweak precision data and Higgs mass constraints rule out a scalar bottom quark with mass of O(5-GeV)?

Marcela Carena
(
- Fermilab
)
,
S. Heinemeyer
(
- DESY
)
,
C.E.M. Wagner
(
- Argonne and
- Chicago U., EFI
)
,
G. Weiglein
(
- CERN
)

- Phys.Rev.Lett. 86 (2001) 4463-4466
•
e-Print:
- hep-ph/0008023
•
DOI:
- 10.1103/PhysRevLett.86.4463

Can MSSM with light sbottom and light gluino survive $Z$ peak constraints?

Jun-jie Cao
(
- CCAST World Lab, Beijing and
- Henan Normal U.
)
,
Zhao-hua Xiong
(
- CCAST World Lab, Beijing and
- Beijing, Inst. Theor. Phys.
)
,
Jin Min Yang
(
- Beijing, Inst. Theor. Phys.
)

- Phys.Rev.Lett. 88 (2002) 111802
•
e-Print:
- hep-ph/0111144
•
DOI:
- 10.1103/PhysRevLett.88.111802

Very light sbottom and gluino scenario confronting electroweak precision tests

Seungwon Baek
(
- Korea Inst. Advanced Study, Seoul
)

- Phys.Lett.B 541 (2002) 161-165
•
e-Print:
- hep-ph/0205013
•
DOI:
- 10.1016/S0370-2693(02)02218-9

Measurement of the $t\bar{t}$ Production Cross Section in $p\bar{p}$ Collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

T. Affolder
(
- LBL, Berkeley
)

et al.

- Phys.Rev.D 64 (2001) 032002,
- Phys.Rev.D 67 (2003) 119901 (erratum)
•
e-Print:
- hep-ex/0101036
•
DOI:
- 10.1103/PhysRevD.64.032002

Monte Carlo Simulation of General Hard Processes with Coherent QCD Radiation

G. Marchesini
(
- Parma U. and
- INFN, Parma
)
,
B.R. Webber
(
- Cambridge U.
)

- Nucl.Phys.B 310 (1988) 461-526
•
DOI:
- 10.1016/0550-3213(88)90089-2

HERWIG: A Monte Carlo event generator for simulating hadron emission reactions with interfering gluons. Version 5.1 - April 1991

G. Marchesini
(
- Parma U. and
- INFN, Parma
)
,
B.R. Webber
(
- Cambridge U.
)
,
G. Abbiendi
(
- Padua U. and
- INFN, Padua
)
,
I.G. Knowles
(
- Glasgow U.
)
,
M.H. Seymour
(
- Cambridge U.
)

et al.

- Comput.Phys.Commun. 67 (1992) 465-508,
- Comput. Phys. Commun. 67 (1992) 465-508 and Hamburg DESY - DESY 91-048 (91/05,rec.Jul.) 49 p
•
DOI:
- 10.1016/0010-4655(92)90055-4

A Precise measurement of Gamma ( $Z \to b \bar{b}$ ) / Gamma ( $Z \to$ hadrons)

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 313 (1993) 535-548,
- Phys. Lett. B313 (1993) 535-548 and CERN Geneva - CERN-PPE-93-108 (93/06,rec.Sep.) 16 p
•
DOI:
- 10.1016/0370-2693(93)90028-G