Bose-Einstein correlations and $b \bar{b}$ correlations in pp collisions with LHCb

Bose-Einstein correlations for same-sign charged pions and kinematic bb‾ correlations in proton-proton collisions at a center-of-mass energy of 7 and 8 TeV are studied by the LHCb experiment. The dependence of Bose-Einstein correlation parameters on the charged-particle multiplicity is investigated. The correlation radius is observed to increase with multiplicity, while the chaoticity parameter decreases. The bb‾ correlations are studied using inclusive b decays to J/ ψ and are found to be in good agreement with theoretical predictions.

Note:

proceedings of the Quark Matter 2018 conference (4 pages, 1 figure, 1 table)

13.85.t
13.85.Qk
14.70.e
Bose-Einstein correlations
heavy-flavor production
forward physics
QCD
talk: Venice 2018/05/14
p p: colliding beams
correlation: Bose-Einstein

References(23)

Figures(1)

[1]

The LHCb Detector at the LHC

LHCb

Collaboration

•

A.Augusto Alves, Jr.
(
- Rio de Janeiro, CBPF
)

et al.

- JINST 3 (2008) S08005
•
DOI:
- 10.1088/1748-0221/3/08/S08005

[2]

LHCb Detector Performance

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Int.J.Mod.Phys.A 30 (2015) 07, 1530022
•
e-Print:
- 1412.6352
•
DOI:
- 10.1142/S0217751X15300227

[3]

A New type of interferometer for use in radio astronomy

R. Hanbury Brown
(
- Jodrell Bank
)
,
R.Q. Twiss

- Phil.Mag.Ser.7 45 (1954) 663-682
•
DOI:
- 10.1080/14786440708520475

[4]

Bose-Einstein correlations for Levy stable source distributions

- Eur.Phys.J.C 36 (2004) 67-78
•
e-Print:
- nucl-th/0310042
•
DOI:
- 10.1140/epjc/s2004-01870-9

[5]

Bose-Einstein correlations in the hadronic decays of the Z0

DELPHI

Collaboration

•

P. Abreu
(
- LIP, Lisbon
)

et al.

- Phys.Lett.B 286 (1992) 201-210
•
DOI:
- 10.1016/0370-2693(92)90181-3

[6]

Pion femtoscopy in $p^+ p$ collisions at $\sqrt{s}=200$ GeV

STAR

Collaboration

•

M.M. Aggarwal
(
- Panjab U.
)

et al.

- Phys.Rev.C 83 (2011) 064905
•
e-Print:
- 1004.0925
•
DOI:
- 10.1103/PhysRevC.83.064905

[7]

Femtoscopy of $pp$ collisions at $\sqrt{s}=0.9$ and 7 TeV at the LHC with two-pion Bose-Einstein correlations

ALICE

Collaboration

•

K. Aamodt
(
- Bergen U.
)

et al.

- Phys.Rev.D 84 (2011) 112004
•
e-Print:
- 1101.3665
•
DOI:
- 10.1103/PhysRevD.84.112004

[8]

Two-particle Bose–Einstein correlations in pp collisions at $\mathbf {\sqrt{s} =}$ 0.9 and 7 TeV measured with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Eur.Phys.J.C 75 (2015) 10, 466
•
e-Print:
- 1502.07947
•
DOI:
- 10.1140/epjc/s10052-015-3644-x

[9]

Bose-Einstein correlations in $pp, p\mathrm{Pb}$ , and PbPb collisions at $\sqrt{{s}_{NN}}=0.9-7$ TeV

CMS

Collaboration

•

Albert M Sirunyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Rev.C 97 (2018) 6, 064912
•
e-Print:
- 1712.07198
•
DOI:
- 10.1103/PhysRevC.97.064912

[10]

Bose-Einstein correlations of same-sign charged pions in the forward region in $pp$ collisions at $\sqrt{s}$ = 7 TeV

LHCb

Collaboration

•

R. Aaij
(
- CERN
)

et al.

- JHEP 12 (2017) 025
•
e-Print:
- 1709.01769
•
DOI:
- 10.1007/JHEP12(2017)025

[11]

Production and hadronization of heavy quarks

- Eur.Phys.J.C 17 (2000) 137-161
•
e-Print:
- hep-ph/0005110
•
DOI:
- 10.1007/s100520000460

[12]

Measurement of $b \bar{b}$ correlations at the CERN $p \bar{p}$ collider

UA1

Collaboration

•

C. Albajar
(
- CERN
)

et al.

- Z.Phys.C 61 (1994) 41-52
•
DOI:
- 10.1007/BF01641885

[13]

Measurement of correlated $b^- \bar{b}$ production in $p^- \bar{p}$ collisions at $\sqrt{s}$ = 1960 GeV

CDF

Collaboration

•

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

et al.

- Phys.Rev.D 77 (2008) 072004
•
e-Print:
- 0710.1895
•
DOI:
- 10.1103/PhysRevD.77.072004

[14]

Measurement of $B\bar{B}$ Angular Correlations based on Secondary Vertex Reconstruction at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Vardan Khachatryan
(
- Yerevan Phys. Inst.
)

et al.

- JHEP 03 (2011) 136
•
e-Print:
- 1102.3194
•
DOI:
- 10.1007/JHEP03(2011)136

[15]

Measurement of $b$ -hadron pair production with the ATLAS detector in proton-proton collisions at $\sqrt{s}=8$ TeV

ATLAS

Collaboration

•

M. Aaboud
(
- Oujda U.
)

et al.

- JHEP 11 (2017) 062
•
e-Print:
- 1705.03374
•
DOI:
- 10.1007/JHEP11(2017)062

[16]

Study of $b\bar{b}$ correlations in high energy proton-proton collisions

LHCb

Collaboration

•

Roel Aaij
(
- CERN
)

et al.

- JHEP 11 (2017) 030
•
e-Print:
- 1708.05994
•
DOI:
- 10.1007/JHEP11(2017)030

[17]

A Brief Introduction to PYTHIA 8.1

Torbjorn Sjostrand
(
- CERN and
- Lund U.
)
,
Stephen Mrenna
(
- Fermilab
)
,
Peter Z. Skands
(
- CERN and
- Fermilab
)

- Comput.Phys.Commun. 178 (2008) 852-867
•
e-Print:
- 0710.3820
•
DOI:
- 10.1016/j.cpc.2008.01.036

[18]

A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX

Simone Alioli
(
- DESY, Zeuthen and
- INFN, Milan Bicocca
)
,
Paolo Nason
(
- INFN, Milan Bicocca
)
,
Carlo Oleari
(
- Milan Bicocca U. and
- INFN, Milan Bicocca
)
,
Emanuele Re
(
- Durham U., IPPP and
- INFN, Milan Bicocca
)

- JHEP 06 (2010) 043
•
e-Print:
- 1002.2581
•
DOI:
- 10.1007/JHEP06(2010)043

[19]

Boson Interferometry - a Review of High-energy Data and Its Interpretation

B. Lorstad
(
- Lund U.
)

- Int.J.Mod.Phys.A 4 (1989) 2861-2896,
- PREPRINT - LOERSTAD, B. (88,REC.AUG.) 64p,
- INT. J. MOD. PHYS. A4 (1989) 2861-2896 AND PREPRINT - LOERSTAD, B. (88,REC.AUG.) 64p
•
DOI:
- 10.1142/S0217751X8900114X