Observation of a new $\Xi_b^0$ state - INSPIRE

DataBETA

Observation of a new $\Xi_b^0$ state

LHCb

Collaboration

Oct 27, 2020

17 pages

Published in:

Phys.Rev.D 103 (2021) 1, 012004

Published: Jan 7, 2021

e-Print:

2010.14485 [hep-ex]

DOI:

10.1103/PhysRevD.103.012004 (publication)

PDG:

{{\mathit \Xi}_{{{b}}}{(6227)}^{-}}

Report number:

LHCb-PAPER-2020-032,
CERN-EP-2020-190

Experiments:

CERN-LHC-LHCb

View in:

reference search43 citations

Citations per year

Abstract: (APS)

Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb-1, the observation of a new excited Ξb0 resonance decaying to the Ξb-π+ final state is presented. The state, referred to as Ξb(6227)0, has a measured mass and natural width of m(Ξb(6227)0)=6227.1-1.5+1.4±0.5 MeV and Γ(Ξb(6227)0)=18.6-4.1+5.0±1.4 MeV, where the uncertainties are statistical and systematic. The production rate of the Ξb(6227)0 state relative to that of the Ξb- baryon in the kinematic region 2<η<5 and pT<30 GeV is measured to be fΞb(6227)0fΞb-B(Ξb(6227)0→Ξb-π+)=0.045±0.008±0.004, where B(Ξb(6227)0→Ξb-π+) is the branching fraction of the decay, and fΞb(6227)0 and fΞb- represent fragmentation fractions. Improved measurements of the mass and natural width of the previously observed Ξb(6227)- state, along with the mass of the Ξb- baryon, are also reported. Both measurements are significantly more precise than, and consistent with, previously reported values.

Note:

15 pages, 5 figures. All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-032.html

Particle Physics Experiments
p p: colliding beams
p p: scattering
Xi/b0: excited state
baryon resonance: hadroproduction
baryon resonance: hadronic decay
mass spectrum: (Xi/b- pi+)
mass: width
baryon resonance: mass: measured
baryon resonance: width

References(65)

Figures(12)

[1]

A Schematic Model of Baryons and Mesons

Murray Gell-Mann
(
- Caltech
)

- Phys.Lett. 8 (1964) 214-215,
- Also in *Lichtenberg, D.B. (ed.), Rosen, S.P., (ed.), Developments In The Quark Theory Of Hadrons, Vol. 1*, 20-21
•
DOI:
- 10.1016/S0031-9163(64)92001-3

[2]

An SU(3) model for strong interaction symmetry and its breaking. Version 1

G. Zweig
(
- CERN
)

DOI:
- 10.17181/CERN-TH-401

[3]

Baryon spectroscopy

Eberhard Klempt
(
- Bonn U., HISKP
)
,
Jean-Marc Richard
(
- LPSC, Grenoble
)

- Rev.Mod.Phys. 82 (2010) 1095-1153
•
e-Print:
- 0901.2055
•
DOI:
- 10.1103/RevModPhys.82.1095

[4]

A Diquark model for baryons containing one heavy quark

Dietmar Ebert
(
- Humboldt U., Berlin
)
,
Thorsten Feldmann
(
- Humboldt U., Berlin
)
,
Christiane Kettner
(
- Tubingen U.
)
,
Hugo Reinhardt
(
- Tubingen U.
)

- Z.Phys.C 71 (1996) 329-336
•
e-Print:
- hep-ph/9506298
•
DOI:
- 10.1007/BF02906991

[5]

Observation of two new $\Xi_b^-$ baryon resonances

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 114 (2015) 062004
•
e-Print:
- 1411.4849
•
DOI:
- 10.1103/PhysRevLett.114.062004

[6]

Observation of a new $\Xi_{b}$ Baryon

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Rev.Lett. 108 (2012) 252002
•
e-Print:
- 1204.5955
•
DOI:
- 10.1103/PhysRevLett.108.252002

[7]

Measurement of the properties of the $\Xi_b^{*0}$ baryon

LHCb

Collaboration

•

Roel Aaij
(
- CERN
)

et al.

- JHEP 05 (2016) 161
•
e-Print:
- 1604.03896
•
DOI:
- 10.1007/JHEP05(2016)161

[8]

Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture

D. Ebert
(
- Humboldt U., Berlin
)
,
R.N. Faustov
(
- Humboldt U., Berlin and
- Moscow, Computing Ctr.
)
,
V.O. Galkin
(
- Humboldt U., Berlin and
- Moscow, Computing Ctr.
)

- Phys.Rev.D 84 (2011) 014025
•
e-Print:
- 1105.0583
•
DOI:
- 10.1103/PhysRevD.84.014025

[9]

Masses of excited heavy baryons in the relativistic quark model

D. Ebert
(
- Humboldt U., Berlin
)
,
R.N. Faustov
(
- Humboldt U., Berlin and
- Moscow, Computing Ctr.
)
,
V.O. Galkin
(
- Humboldt U., Berlin and
- Moscow, Computing Ctr.
)

- Phys.Lett.B 659 (2008) 612-620
•
e-Print:
- 0705.2957
•
DOI:
- 10.1016/j.physletb.2007.11.037

[10]

Heavy baryons in a quark model

W. Roberts
(
- Florida State U.
)
,
Muslema Pervin
(
- Argonne, PHY
)

- Int.J.Mod.Phys.A 23 (2008) 2817-2860
•
e-Print:
- 0711.2492
•
DOI:
- 10.1142/S0217751X08041219

[11]

Faddeev study of heavy baryon spectroscopy

H. Garcilazo
(
- Mexico, ESFM
)
,
J. Vijande
(
- Valencia U. and
- Valencia U., IFIC and
- Salamanca U., IUFFyM
)
,
A. Valcarce
(
- Salamanca U., IUFFyM
)

- J.Phys.G 34 (2007) 961-976
•
e-Print:
- hep-ph/0703257
•
DOI:
- 10.1088/0954-3899/34/5/014

[12]

Assignments of $\Lambda_Q$ and $\Xi_Q$ baryons in the heavy quark-light diquark picture

- Eur.Phys.J.A 51 (2015) 82
•
e-Print:
- 1406.6561
•
DOI:
- 10.1140/epja/i2015-15082-3

[13]

QCD sum rule calculation for P-wave bottom baryons

Qiang Mao
(
- Beihang U. and
- Suzhou, Soochow U.
)
,
Hua-Xing Chen
(
- Frascati and
- Beihang U.
)
,
Wei Chen
(
- Saskatchewan U.
)
,
Atsushi Hosaka
(
- J-PARC and
- Osaka U., Res. Ctr. Nucl. Phys.
)
,
Xiang Liu
(
- Lanzhou, Inst. Modern Phys. and
- Lanzhou U.
)

et al.

- Phys.Rev.D 92 (2015) 11, 114007
•
e-Print:
- 1510.05267
•
DOI:
- 10.1103/PhysRevD.92.114007

[14]

Odd parity bottom-flavored baryon resonances

C. Garcia-Recio
(
- Granada U.
)
,
J. Nieves
(
- Valencia U., IFIC
)
,
O. Romanets
(
- Groningen, KVI
)
,
L.L. Salcedo
(
- Granada U.
)
,
L. Tolos
(
- Barcelona, IEEC and
- Frankfurt U., FIAS
)

- Phys.Rev.D 87 (2013) 3, 034032
•
e-Print:
- 1210.4755
•
DOI:
- 10.1103/PhysRevD.87.034032

[15]

The Quark Model and $b$ Baryons

Marek Karliner
(
- Tel Aviv U.
)
,
Boaz Keren-Zur
(
- Tel Aviv U.
)
,
Harry J. Lipkin
(
- Tel Aviv U. and
- Weizmann Inst. and
- Argonne, PHY
)
,
Jonathan L. Rosner
(
- Chicago U., EFI
)

- Annals Phys. 324 (2009) 2-15
•
e-Print:
- 0804.1575
•
DOI:
- 10.1016/j.aop.2008.05.003

[16]

Analysis of the ${1/2^-}$ and ${3/2^-}$ heavy and doubly heavy baryon states with QCD sum rules

Zhi-Gang Wang
(
- North China Electric Power U., Beijing
)

- Eur.Phys.J.A 47 (2011) 81
•
e-Print:
- 1003.2838
•
DOI:
- 10.1140/epja/i2011-11081-8

[17]

Towards an understanding of heavy baryon spectroscopy

A. Valcarce
(
- Salamanca U., IUFFyM
)
,
H. Garcilazo
(
- Mexico, ESFM
)
,
J. Vijande
(
- Valencia U. and
- Valencia U., IFIC
)

- Eur.Phys.J.A 37 (2008) 217-225
•
e-Print:
- 0807.2973
•
DOI:
- 10.1140/epja/i2008-10616-4

[18]

Heavy hadron spectroscopy: a quark model perspective

J. Vijande
(
- Valencia U. and
- Valencia U., IFIC
)
,
A. Valcarce
(
- Salamanca U.
)
,
T.F. Carames
(
- Salamanca U.
)
,
H. Garcilazo
(
- Mexico, ESFM
)

- Int.J.Mod.Phys.E 22 (2013) 1330011
•
e-Print:
- 1212.4383
•
DOI:
- 10.1142/S0218301313300117

[19]

Strong and radiative decays of the low-lying $S$ - and $P$ -wave singly heavy baryons

Kai-Lei Wang
(
- Hunan Normal U. and
- Hunan, LDQSQC
)
,
Ya-Xiong Yao
(
- Hunan Normal U. and
- Hunan, LDQSQC
)
,
Xian-Hui Zhong
(
- Hunan Normal U. and
- Hunan, LDQSQC
)
,
Qiang Zhao
(
)

- Phys.Rev.D 96 (2017) 11, 116016
•
e-Print:
- 1709.04268
•
DOI:
- 10.1103/PhysRevD.96.116016

[20]

Spectra of charmed and bottom baryons with hyperfine interaction

Zhen-Yang Wang
(
- Beijing Normal U.
)
,
Jing-Juan Qi
(
- Beijing Normal U.
)
,
Xin-Heng Guo
(
- Beijing Normal U.
)
,
Ke-Wei Wei
(
- Anyang Norm U.
)

- Chin.Phys.C 41 (2017) 9, 093103
•
e-Print:
- 1701.04524
•
DOI:
- 10.1088/1674-1137/41/9/093103

[21]

D-wave charmed and bottomed baryons from QCD sum rules

Hua-Xing Chen
(
- Beihang U.
)
,
Qiang Mao
(
- Beihang U. and
- Suzhou, Soochow U.
)
,
Atsushi Hosaka
(
- J-PARC and
- Osaka U., Res. Ctr. Nucl. Phys.
)
,
Xiang Liu
(
- Lanzhou U. and
- Lanzhou, Inst. Modern Phys.
)
,
Shi-Lin Zhu
(
- CICQM, Beijing and
- Peking U., CHEP and
- Peking U., SKLNPT
)

- Phys.Rev.D 94 (2016) 11, 114016
•
e-Print:
- 1611.02677
•
DOI:
- 10.1103/PhysRevD.94.114016

[22]

Excited State Mass spectra and Regge trajectories of Bottom Baryons

- Nucl.Phys.A 965 (2017) 57-73
•
e-Print:
- 1610.00411
•
DOI:
- 10.1016/j.nuclphysa.2017.05.087

[23]

Observation of a new $\Xi_b^-$ resonance

LHCb

Collaboration

•

Roel Aaij
(
- NIKHEF, Amsterdam
)

et al.

- Phys.Rev.Lett. 121 (2018) 7, 072002
•
e-Print:
- 1805.09418
•
DOI:
- 10.1103/PhysRevLett.121.072002

[24]

Interpretation of the newly observed $\Sigma_b(6097)^{\pm}$ and $\Xi_b(6227)^-$ states as the $P$ -wave bottom baryons

Kai-Lei Wang
(
- Hunan Normal U. and
- Hunan, LDQSQC
)
,
Qi-Fang Lü
(
- Hunan Normal U. and
- Hunan, LDQSQC
)
,
Xian-Hui Zhong
(
- Hunan Normal U. and
- Hunan, LDQSQC
)

- Phys.Rev.D 99 (2019) 1, 014011
•
e-Print:
- 1810.02205
•
DOI:
- 10.1103/PhysRevD.99.014011

[25]

Role of newly discovered $\Xi_b(6227)^-$ for constructing excited bottom baryon family

Bing Chen
(
- Anyang Norm U. and
- Lanzhou U. and
- Lanzhou, Inst. Modern Phys.
)
,
Ke-Wei Wei
(
- Anyang Norm U.
)
,
Xiang Liu
(
- Lanzhou U. and
- Lanzhou, Inst. Modern Phys.
)
,
Ailin Zhang
(
- Shanghai U.
)

- Phys.Rev.D 98 (2018) 3, 031502
•
e-Print:
- 1805.10826
•
DOI:
- 10.1103/PhysRevD.98.031502

1-25 of 65
1
2
3
25 / page