Observation of excited Lambda_b0 baryons

Abstract

Using pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Lambda_b0pi+pi- spectrum with masses 5911.97 +- 0.12(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2 and 5919.77 +- 0.08(stat) +- 0.02(syst) +- 0.66(Lambda_b0 mass) MeV/c^2. The significances of the observations are 5.2 and 10.2 standard deviations, respectively. These states are interpreted as the orbitally-excited Lambda_b0 baryons, Lambda_b*0(5912) and Lambda_b*0(5920).

Replaced by version published in Phys. Rev. Lett, modified fit with better mass resolution treatment

References in corpus (7)

• PYTHIA 6.4 Physics and Manual
• Heavy Baryons in a Quark Model
• Masses of excited heavy baryons in the relativistic quark-diquark picture
• Faddeev study of heavy baryon spectroscopy
• Direct observation of the strange b baryon Xi_b^{-}
• Observation of the doubly strange b baryon Omega_b-
• Observation of a new Xi(b) baryon

Cited by in corpus (74)

• An updated review of the new hadron states
• A review of the open charm and open bottom systems
• Implications of LHCb measurements and future prospects
• Progress Toward Understanding Baryon Resonances
• Combining heavy quark spin and local hidden gauge symmetries in the dynamical generation of hidden charm baryons
• Assignments of ${\Lambda }_Q$ and ${\Xi }_Q$ baryons in the heavy quark-light diquark picture
• Strong and radiative decays of the low-lying $S$- and $P$-wave singly heavy baryons
• Observation of a new ${\Xi }_b^{-}$ resonance
• Hidden charm N and Delta resonances with heavy-quark symmetry
• QCD sum rule calculation for P-wave bottom baryons
• Excited State Mass spectra and Regge trajectories of Bottom Baryons
• Odd parity bottom-flavored baryon resonances
• Spectroscopy of singly, doubly, and triply bottom baryons
• Measurements of the Lambda_b0 -> J/psi Lambda decay amplitudes and the Lambda_b0 polarisation in pp collisions at sqrt(s) = 7 TeV
• Baryon states with open beauty in the extended local hidden gauge approach
• Observation of two resonances in the ${\Lambda }_b^0{\pi }^{\pm }$ systems and precise measurement of ${\Sigma }_b^{\pm }$ and ${\Sigma }_b^{\ast \pm }$ properties
• Dynamically generated $J^P=1/2^{-}(3/2^{-})$ singly charmed and bottom heavy baryons
• Hadrons and Nuclei
• Heavy quark symmetry in multi-hadron systems
• Observation of new resonances in the ${\Lambda }_b^0{\pi }^{+}{\pi }^{-}$ system
• Role of newly discovered ${\Xi }_b(6227{)}^{-}$ for constructing excited bottom baryon family
• Masses and radiative decay widths of S- and P-wave singly-, doubly- and triply-heavy charm and bottom baryons
• Studies of beauty baryon decays to $D^{0}p{h}^{-}$ and ${\Lambda }_c^{+}{h}^{-}$ final states
• Observation of the ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decay
• Study of excited ${\Lambda }_{\mathrm{b}}^0$ states decaying to ${\Lambda }_{\mathrm{b}}^0{\pi }^{+}{\pi }^{-}$ in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Evidence for a bottom baryon resonance Lambda_b* in CDF data
• Observation of a new baryon state in the ${\Lambda }_b^0{\pi }^{+}{\pi }^{-}$ mass spectrum
• Compositeness of the strange, charm and beauty odd parity $\Lambda$ states
• Excited mesons, baryons, glueballs and tetraquarks: Predictions of the Holography Inspired Stringy Hadron model
• Single heavy baryons with chiral partner structure in a three-flavor chiral model
• Mass-spectra of singly, doubly, and triply bottom baryons
• Mass and lifetime measurements of bottom and charm baryons in $p\bar{p}$ collisions at $\sqrt{s}= 1.96 TeV
• Prospects for observing the lowest-lying odd-parity ${\Sigma }_c$ and ${\Sigma }_b$ baryons
• Measurement of the ${\Lambda }_b$ polarization and angular parameters in ${\Lambda }_b\to J/\psi \Lambda$ decays from pp collisions at $\sqrt{s}=$ 7 and 8 TeV
• Identification of the newly observed ${\Sigma }_b(6097{)}^{\pm }$ baryons from their strong decays
• Open bottom states and the anti-B meson propagation in hadronic matter
• Interpretation of the observed ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ states as 1$D$ bottom baryons
• Observations of ${\Lambda }_b^0\to \Lambda K^{+}{\pi }^{-}$ and ${\Lambda }_b^0\to \Lambda K^{+}{K}^{-}$ decays and searches for other ${\Lambda }_b^0$ and ${\Xi }_b^0$ decays to $\Lambda h^{+}{h}^{\prime -}$ final states
• Structure of the ${\Xi }_b(6227{)}^{-}$ Resonance
• Observation of two new excited ${\Xi }_b^0$ states decaying to ${\Lambda }_b^0{K}^{-}{\pi }^{+}$
• Strong decays of the ${\Xi }_b(6227)$ as a ${\Sigma }_b\bar{K}$ molecule
• ${\Omega }_c$ excited states within a ${\mathrm{SU}(6)}_{\mathrm{lsf}}\times$HQSS model
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Mass spectra of singly heavy baryons in a self-consistent chiral quark-soliton model
• Determination of the quantum numbers of ${\Sigma }_b(6097{)}^{\pm }$ via their strong decays
• Universal behavior of mass gaps existing in the single heavy baryon family
• The Status of ${\Xi }_{cc}^{++}$ Baryon: investigating quark-diquark model
• Measurement of the ${\Lambda }_b^0\to J/\psi \Lambda$ angular distribution and the ${\Lambda }_b^0$ polarisation in $pp$ collisions
• Analysis of ${\Lambda }_c(2595)$, ${\Lambda }_c(2625)$, ${\Lambda }_b(5912)$, ${\Lambda }_b(5920)$ based on a chiral partner structure
• Probing gluon dynamics by charm and bottom mesons in nuclear medium from heavy meson effective theory with 1/M-corrections
• Molecular ${\Omega }_{cc}$ , ${\Omega }_{bb}$ and ${\Omega }_{bc}$ states
• ${\chi }_{c0}(1P)$ decay into $\bar{\Sigma }\Sigma \pi$ in search of an $I=1$, $1/2^{-}$ baryon state around $\bar{K}N$ threshold
• $b$-hadron spectroscopy study based on the similarity of double bottom baryon and bottom meson
• Heavy baryons in a pion mean-field approach: A brief review
• Dipion decays of heavy baryons
• Identifying the ${\Xi }_b(6100)$ as the $P$-wave bottom baryon of $J^P=3/2^{-}$
• The ${\Lambda }_c(2595)$ resonance as a dynamically generated state: the compositeness condition and the large $N_c$ evolution
• Strong decay properties of single heavy baryons ${\Lambda }_Q$, ${\Sigma }_Q$ and ${\Omega }_Q$
• Heavy Flavour Physics at the LHC
• New ${\Lambda }_b(6072{)}^0$ state as a $2S$ bottom baryon
• Spectra of charmed and bottom baryons with hyperfine interaction
• Predicted ${\Xi }_b(6087{)}^0$ and further predictions
• Observation of the ${\Lambda }_{\mathrm{b}}^0$ $\to$ J/$\psi \Lambda \varphi$ decay in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• The $1D$, $2D$ ${\Xi }_b$ and ${\Lambda }_b$ baryons
• Decay widths and mass spectra of single bottom baryons
• The $\Lambda$-type P-wave bottom baryon states via the QCD sum rules
• Axial-vector transition form factors of the singly heavy baryons
• Analysis of the strong vertices of ${\Sigma }_{c}N{D}^{\ast }$ and ${\Sigma }_{b}N{B}^{\ast }$ in QCD sum rules
• Heavy baryon production with an instanton interaction
• Review of Physics Results from the Tevatron: Heavy Flavor Physics
• Spectroscopic properties of $1F$-wave singly bottom baryons
• Mass spectrum and magnetic moments of singly-charmed baryons: a quark-diquark model analysis of ${\Omega }_c(3185{)}^0$ and ${\Omega }_c(3327{)}^0$
• ${\Omega }_c$ excited states: a molecular approach with heavy-quark spin symmetry
• Charming Baryons