M. Kelsey

activity

20112023

J / ψ p

resonances consistent with pentaquark states in

Λ_{b}^{0} \to J / ψ K^{-} p

decays

1.3k citations · 17.2k across the 272 of their papers we have counts for

collaborators

Showing hep-exShow all

237 papers · 1 filter

hep-ex2023★ 8 cited

Longitudinal and transverse spin transfer to $Λ$ and $Λ$ hyperons in polarized $p$ + $p$ collisions at $s = 200$ GeV

STAR Collaboration, M. I. Abdulhamid, B. E. Aboona +364

The longitudinal and transverse spin transfers to $Λ$ ( $Λ$ ) hyperons in polarized proton-proton collisions are expected to be sensitive to the helicity and transversity di…

hep-ex2021★ 9 cited

Probing gluon helicity with heavy flavor at the EIC

Daniele Paolo Anderle, Xin Dong, Felix Hekhorn +7

We propose a new measurement of the heavy flavor hadron double spin asymmetry in deep-inelastic scattering at a future Electron-Ion Collider (EIC) to constrain the polarized gluon…

hep-ex2021★ 48 cited

Search for the doubly heavy baryons $Ω_{bc}^{0}$ and $Ξ_{bc}^{0}$ decaying to $Λ_{c}^{+} π^{-}$ and $Ξ_{c}^{+} π^{-}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +900

The first search for the doubly heavy $Ω_{bc}^{0}$ baryon and a search for $Ξ_{bc}^{0}$ baryon are performed using $pp$ collision data collected via the LHCb experiment…

hep-ex2020★ 33 cited

Measurement of transverse single-spin asymmetries of $π^{0}$ and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions

STAR Collaboration, J. Adam, L. Adamczyk +359

The STAR Collaboration reports measurements of the transverse single-spin asymmetry (TSSA) of inclusive $π^{0}$ at center-of-mass energies ( $s$ ) of 200 GeV and 500 GeV in trans…

hep-ex2020

Searches for 25 rare and forbidden decays of $D^{+}$ and $D_{s}^{+}$ mesons

LHCb collaboration, R. Aaij, C. Abellán Beteta +998

A search is performed for rare and forbidden charm decays of the form $D_{(s)}^{+} \to h^{\pm} ℓ^{+} ℓ^{(') \mp}$ , where $h^{\pm}$ is a pion or kaon and $ℓ^{(^{'}) \pm}$ is an ele…

hep-ex2020★ 33 cited

Search for the doubly heavy $Ξ_{b c}^{0}$ baryon via decays to $D^{0} p K^{-}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +987

A search for the doubly heavy $Ξ_{b c}^{0}$ baryon using its decay to the $D^{0} p K^{-}$ final state is performed using proton-proton collision data at a centre-of-mass energy of…

hep-ex2020★ 28 cited

First branching fraction measurement of the suppressed decay $Ξ_{c}^{0} \to π^{-} Λ_{c}^{+}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +963

The $Ξ_{c}^{0}$ baryon is unstable and usually decays into charmless final states by the $c \to s u d$ transition. It can, however, also disintegrate into a $π^{-}$ meson and a…

hep-ex2020★ 5 cited

First observation of the decay $Λ_{b}^{0} \to η_{c} (1 S) p K^{-}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +985

The decay $Λ_{b}^{0} \to η_{c} (1 S) p K^{-}$ is observed for the first time using a data sample of proton-proton collisions, corresponding to an integrated luminosity of 5.5 $f b^{- 1}$ , coll…

hep-ex2020★ 20 cited

Observation of enhanced double parton scattering in proton-lead collisions at $s_{NN} = 8.16$ TeV

LHCb collaboration, R. Aaij, C. Abellán Beteta +992

A study of prompt charm-hadron pair production in proton-lead collisions at $s_{NN} = 8.16$ TeV is performed using data corresponding to an integrated luminosity of ab…

hep-ex2020★ 5 cited

First observation of the decay $B^{0} \to D^{0} D^{0} K^{+} π^{-}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +965

The first observation of the decay $B^{0} \to D^{0} D^{0} K^{+} π^{-}$ is reported using proton-proton collision data corresponding to an integrated luminosity of 4.7 $\…

hep-ex2020★ 32 cited

Searches for low-mass dimuon resonances

LHCb collaboration, R. Aaij, C. Abellán Beteta +965

Searches are performed for a low-mass dimuon resonance, $X$ , produced in proton-proton collisions at a center-of-mass energy of 13 TeV, using a data sample corresponding to an inte…

hep-ex2020★ 414 cited

Observation of structure in the $J / ψ$ -pair mass spectrum

LHCb collaboration, R. Aaij, C. Abellán Beteta +964

Using proton-proton collision data at centre-of-mass energies of $s = 7$ , $8$ and $13 TeV$ recorded by the LHCb experiment at the Large Hadron Collider, correspond…

hep-ex2020★ 29 cited

Search for $C P$ violation in $Ξ_{c}^{+} \to p K^{-} π^{+}$ decays using model-independent techniques

LHCb collaboration, R. Aaij, C. Abellán Beteta +950

A first search for $C P$ violation in the Cabibbo-suppressed $Ξ_{c}^{+} \to p K^{-} π^{+}$ decay is performed using both a binned and an unbinned model-independent technique in the Dal…

hep-ex2020★ 1 cited

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at $s$ = 200 GeV Obtained with the STAR Detector at RHIC

W. Guryn, B. Pawlik

We report the first results on differential, total and elastic cross sections in proton-proton collisions at the Relativistic Heavy Ion Collider (RHIC) at $s = 200$ GeV. The d…

hep-ex2020★ 53 cited

Study of the $ψ_{2} (3823)$ and $χ_{c 1} (3872)$ states in $B^{+} \to (J ψ π^{+} π^{-}) K^{+}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +956

The decays $B^{+} \to J / ψ π^{+} π^{-} K^{+}$ are studied using a data set corresponding to an integrated luminosity of 9fb $^{- 1}$ collected with the LHCb detector in proton-proton co…

hep-ex2020★ 138 cited

Study of the lineshape of the $χ_{c 1} (3872)$ state

LHCb collaboration, R. Aaij, C. Abellán Beteta +965

A study of the lineshape of the $χ_{c 1} (3872)$ state is made using a data sample corresponding to an integrated luminosity of $3$ fb $^{- 1}$ collected in $pp$ collisions at centre-…

hep-ex2020★ 6 cited

Measurement of branching fraction ratios for $B^{+} \to D^{+} D^{-} K^{+}$ , $B^{+} \to D^{-} D^{+} K^{+}$ , and $B^{0} \to D^{*-} D^{0} K^{+}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +914

A measurement of four branching-fraction ratios for three-body decays of $B$ mesons involving two open-charm hadrons in the final state is presented. Run 1 and Run 2 $pp$ collision…

hep-ex2020★ 20 cited

Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at $s = 200$ GeV with the STAR detector at RHIC

STAR Collaboration, J. Adam, L. Adamczyk +352

We report on the measurement of the Central Exclusive Production of charged particle pairs $h^{+} h^{-}$ ( $h = π, K, p$ ) with the STAR detector at RHIC in proton-proton collisions a…

hep-ex2020★ 17 cited

Precision measurement of the $B_{c}^{+}$ meson mass

LHCb collaboration, R. Aaij, C. Abellán Beteta +905

A precision measurement of the $B_{c}^{+}$ meson mass is performed using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of $7, 8$ and $1…

hep-ex2020★ 15 cited

Measurement of the shape of the $B_{s}^{0} \to D_{s}^{*-} μ^{+} ν_{μ}$ differential decay rate

LHCb collaboration, R. Aaij, C. Abellán Beteta +906

The shape of the $B_{s}^{0} \to D_{s}^{*-} μ^{+} ν_{μ}$ differential decay rate is obtained as a function of the hadron recoil using proton-proton collision data at a centre-of-mass ene…

hep-ex2020★ 42 cited

Measurement of Groomed Jet Substructure Observables in \pp Collisions at $s = 200$ GeV with STAR

STAR Collaboration, J. Adam, L. Adamczyk +348

In this letter, measurements of the shared momentum fraction ( $z_{g}$ ) and the groomed jet radius ( $R_{g}$ ), as defined in the SoftDrop algorihm, are reported in \pp coll…

hep-ex2020★ 12 cited

Measurement of $C P$ observables in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ with $D \to K_{S}^{0} K^{\pm} π^{\mp}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +904

Measurements of $C P$ observables in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ decays are presented, where $D$ represents a superposition of $D^{0}$ and $D ˉ^{0}$ states. The $D$ …

hep-ex2020★ 45 cited

Observation of a new baryon state in the $Λ_{b}^{0} π^{+} π^{-}$ mass spectrum

LHCb collaboration, R. Aaij, C. Abellán Beteta +905

A new baryon state is observed in the $Λ_{b}^{0} π^{+} π^{-}$ mass spectrum with high significance using a data sample of $pp$ collisions, collected with the LHCb detector at centre-of-mass…

hep-ex2020★ 28 cited

Constraints on the $K_{S}^{0} \to μ^{+} μ^{-}$ branching fraction

LHCb collaboration, R. Aaij, C. Abellán Beteta +901

A search for the decay $K_{S}^{0} \to μ^{+} μ^{-}$ is performed using proton-proton collision data, corresponding to an integrated luminosity of $5.6 fb^{- 1}$ a…

Longitudinal and transverse spin transfer to Λ and Λ hyperons in polarized p+p collisions at s​=200 GeV

Probing gluon helicity with heavy flavor at the EIC

Search for the doubly heavy baryons Ωbc0​ and Ξbc0​ decaying to Λc+​π− and Ξc+​π−

Measurement of transverse single-spin asymmetries of π0 and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions

Searches for 25 rare and forbidden decays of D+ and Ds+​ mesons

Search for the doubly heavy Ξbc0​ baryon via decays to D0pK−

First branching fraction measurement of the suppressed decay Ξc0​→π−Λc+​

First observation of the decay Λb0​→ηc​(1S)pK−

Observation of enhanced double parton scattering in proton-lead collisions at sNN​​=8.16 TeV

First observation of the decay B0→D0D0K+π−

Searches for low-mass dimuon resonances

Observation of structure in the J/ψ-pair mass spectrum

Search for CP violation in Ξc+​→pK−π+ decays using model-independent techniques

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at s​ = 200 GeV Obtained with the STAR Detector at RHIC

Study of the ψ2​(3823) and χc1​(3872) states in B+→(Jψπ+π−)K+ decays

Study of the lineshape of the χc1​(3872) state

Measurement of branching fraction ratios for B+→D∗+D−K+, B+→D∗−D+K+, and B0→D∗−D0K+ decays

Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at s​=200 GeV with the STAR detector at RHIC

Precision measurement of the Bc+​ meson mass

Measurement of the shape of the Bs0​→Ds∗−​μ+νμ​ differential decay rate

Measurement of Groomed Jet Substructure Observables in \pp Collisions at s​=200 GeV with STAR

Measurement of CP observables in B±→DK± and B±→Dπ± with D→KS0​K±π∓ decays

Observation of a new baryon state in the Λb0​π+π− mass spectrum

Constraints on the KS0​→μ+μ− branching fraction

Longitudinal and transverse spin transfer to $Λ$ and $Λ$ hyperons in polarized $p$ + $p$ collisions at $s = 200$ GeV

Search for the doubly heavy baryons $Ω_{bc}^{0}$ and $Ξ_{bc}^{0}$ decaying to $Λ_{c}^{+} π^{-}$ and $Ξ_{c}^{+} π^{-}$

Measurement of transverse single-spin asymmetries of $π^{0}$ and electromagnetic jets at forward rapidity in 200 and 500 GeV transversely polarized proton-proton collisions

Searches for 25 rare and forbidden decays of $D^{+}$ and $D_{s}^{+}$ mesons

Search for the doubly heavy $Ξ_{b c}^{0}$ baryon via decays to $D^{0} p K^{-}$

First branching fraction measurement of the suppressed decay $Ξ_{c}^{0} \to π^{-} Λ_{c}^{+}$

First observation of the decay $Λ_{b}^{0} \to η_{c} (1 S) p K^{-}$

Observation of enhanced double parton scattering in proton-lead collisions at $s_{NN} = 8.16$ TeV

First observation of the decay $B^{0} \to D^{0} D^{0} K^{+} π^{-}$

Observation of structure in the $J / ψ$ -pair mass spectrum

Search for $C P$ violation in $Ξ_{c}^{+} \to p K^{-} π^{+}$ decays using model-independent techniques

Results on Total and Elastic Cross Sections in Proton-Proton Collisions at $s$ = 200 GeV Obtained with the STAR Detector at RHIC

Study of the $ψ_{2} (3823)$ and $χ_{c 1} (3872)$ states in $B^{+} \to (J ψ π^{+} π^{-}) K^{+}$ decays

Study of the lineshape of the $χ_{c 1} (3872)$ state

Measurement of branching fraction ratios for $B^{+} \to D^{+} D^{-} K^{+}$ , $B^{+} \to D^{-} D^{+} K^{+}$ , and $B^{0} \to D^{*-} D^{0} K^{+}$ decays

Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at $s = 200$ GeV with the STAR detector at RHIC

Precision measurement of the $B_{c}^{+}$ meson mass

Measurement of the shape of the $B_{s}^{0} \to D_{s}^{*-} μ^{+} ν_{μ}$ differential decay rate

Measurement of Groomed Jet Substructure Observables in \pp Collisions at $s = 200$ GeV with STAR

Measurement of $C P$ observables in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ with $D \to K_{S}^{0} K^{\pm} π^{\mp}$ decays

Observation of a new baryon state in the $Λ_{b}^{0} π^{+} π^{-}$ mass spectrum

Constraints on the $K_{S}^{0} \to μ^{+} μ^{-}$ branching fraction