Measurement of the Ratio of Differential Cross Sections ${\sigma}(p\bar{p} \to Z + b jet)/{\sigma}(p\bar{p} \to Z + jet)$ in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV

We measure the ratio of cross sections, σ(pp¯→Z+b jet)/σ(pp¯→Z+jet), for associated production of a Z boson with at least one jet. The ratio is also measured as a function of the Z boson transverse momentum, jet transverse momentum, jet pseudorapidity, and the azimuthal angle between the Z boson with respect to the highest pT b tagged jet. These measurements use data collected by the D0 experiment in Run II of Fermilab’s Tevatron pp¯ Collider at a center-of-mass energy of 1.96 TeV, and correspond to an integrated luminosity of 9.7 fb-1. The results are compared to predictions from next-to-leading order calculations and various Monte Carlo event generators.

Note:

Submitted to Phys. Rev. D

14.70.Hp
14.65.Fy
13.85.Qk
12.38.Qk
jet: bottom
transverse momentum dependence
rapidity dependence
differential cross section: ratio
Z0: hadroproduction
Z0: leptonic decay

References(39)

Figures(9)

[1]

Associated production of a $Z$ Boson and a single heavy quark jet

John M. Campbell
(
- Argonne
)
,
R.Keith Ellis
(
- Fermilab
)
,
F. Maltoni
(
- Rome III U.
)
,
S. Willenbrock
(
- Illinois U., Urbana and
- Santa Barbara, KITP
)

- Phys.Rev.D 69 (2004) 074021
•
e-Print:
- hep-ph/0312024
•
DOI:
- 10.1103/PhysRevD.69.074021

[2]

Search for the Standard Model Higgs Boson in $ZH \to \ell^+ \ell^- b\bar{b}$ Production with the D0 Detector in 9.7 fb $^{-1}$ of $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV

D0

Collaboration

•

Victor Mukhamedovich Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 109 (2012) 121803
•
e-Print:
- 1207.5819
•
DOI:
- 10.1103/PhysRevLett.109.121803

[2]

Search for the standard model Higgs boson decaying to a bb pair in events with two oppositely-charged leptons using the full CDF data set

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys.
)

et al.

- Phys.Rev.Lett. 109 (2012) 111803
•
e-Print:
- 1207.1704
•
DOI:
- 10.1103/PhysRevLett.109.111803

[3]

Search for Scalar Bottom Quarks and Third-Generation Leptoquarks in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV

D0

Collaboration

•

Victor Mukhamedovich Abazov
(
- Dubna, JINR
)

et al.

- Phys.Lett.B 693 (2010) 95-101
•
e-Print:
- 1005.2222
•
DOI:
- 10.1016/j.physletb.2010.08.028

[3]

Search for the Production of Scalar Bottom Quarks in $p \bar {p}$ Collisions at $\sqrt{s}$ = 1.96 TeV

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys.
)

et al.

- Phys.Rev.Lett. 105 (2010) 081802
•
e-Print:
- 1005.3600
•
DOI:
- 10.1103/PhysRevLett.105.081802

[4]

NLO QCD corrections to $Z b \bar{b}$ production with massive bottom quarks at the Fermilab Tevatron

- Phys.Rev.D 78 (2008) 074014
•
e-Print:
- 0806.0808
•
DOI:
- 10.1103/PhysRevD.78.074014

[5]

Higgs production in association with bottom quarks at hadron colliders

- Mod.Phys.Lett.A 21 (2006) 89-110
•
e-Print:
- hep-ph/0508293
•
DOI:
- 10.1142/S0217732306019256

[6]

Measurement of Cross Sections for $b$ Jet Production in Events with a $Z$ Boson in $p^-$ anti-p Collisions at $\sqrt{s}$ = 1.96-TeV

CDF

Collaboration

•

T. Aaltonen
(
- Helsinki Inst. of Phys.
)

et al.

- Phys.Rev.D 79 (2009) 052008
•
e-Print:
- 0812.4458
•
DOI:
- 10.1103/PhysRevD.79.052008

[7]

Measurement of the $b$ jet cross-section in events with a $Z$ boson in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96-TeV

CDF

Collaboration

•

A. Abulencia
(
- Illinois U., Urbana
)

et al.

- Phys.Rev.D 74 (2006) 032008
•
e-Print:
- hep-ex/0605099
•
DOI:
- 10.1103/PhysRevD.74.032008

[8]

A measurement of the ratio of inclusive cross sections $\sigma(p p \to Z + b-{\rm jet})/\sigma(p p \to Z + jet)$ at $\sqrt{s} = 1.96$ TeV

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 94 (2005) 161801
•
e-Print:
- hep-ex/0410078
•
DOI:
- 10.1103/PhysRevLett.94.161801

[9]

A Measurement of the Ratio of Inclusive Cross Sections $\sigma(p\bar{p}\rightarrow Z+b{\rm\, jet})/ \sigma(p\bar{p}\rightarrow Z+{\rm jet})$ at $\sqrt{s}=1.96$ TeV

D0

Collaboration

•

Victor Mukhamedovich Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.D 83 (2011) 031105
•
e-Print:
- 1010.6203
•
DOI:
- 10.1103/PhysRevD.83.031105

[10]

Measurement of the cross-section for $b$ -jets produced in association with a $Z$ boson at $\sqrt{s}=$ 7 TeV with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- Phys.Lett.B 706 (2012) 295-313
•
e-Print:
- 1109.1403
•
DOI:
- 10.1016/j.physletb.2011.11.059

[11]

Measurement of the Z/ $\gamma$ *+b-jet Cross Section in $pp$ Collisions at $\sqrt{s} = 7 TeV$

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 06 (2012) 126
•
e-Print:
- 1204.1643
•
DOI:
- 10.1007/JHEP06(2012)126

[12]

The Upgraded D0 Detector

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Nucl.Instrum.Meth.A 565 (2006) 463-537
•
e-Print:
- physics/0507191
•
DOI:
- 10.1016/j.nima.2006.05.248

[12]

Design and Implementation of the New D0 Level-1 Calorimeter Trigger

M. Abolins
(
- Michigan State U.
)
,
M. Adams
(
- Illinois U., Chicago
)
,
T. Adams
(
- Florida State U.
)
,
Ernest Aguilo
(
- Alberta U. and
- York U., Canada
)
,
J. Anderson
(
- Fermilab
)

et al.

- Nucl.Instrum.Meth.A 584 (2008) 75-97
•
e-Print:
- 0709.3750
•
DOI:
- 10.1016/j.nima.2007.10.014

[12]

The Layer 0 Inner Silicon Detector of the D0 Experiment

D0

Collaboration

•

R. Angstadt
(
- Fermilab
)

et al.

- Nucl.Instrum.Meth.A 622 (2010) 298-310
•
e-Print:
- 0911.2522
•
DOI:
- 10.1016/j.nima.2010.04.148

[13]

$b$ -Jet Identification in the D0 Experiment

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Nucl.Instrum.Meth.A 620 (2010) 490-517
•
e-Print:
- 1002.4224
•
DOI:
- 10.1016/j.nima.2010.03.118

[14]

The primary pp interaction vertex is that found to be the most likely collision point, among possibly several collisions within a specific beam crossing, from which our selected objects emanate. The algorithm for defining it can be found in [13]

[15]

Pseudorapidity is defined as η = - ln[tan(θ/2)], with the polar angle θ measured relative to the proton beam direction

[16]