K. K. Allison
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K. K. Allison has a total of 1000 co-authors. Here are the top co-authors by number of shared publications:
A. F. Camino
University of Pittsburgh
11 shared publications- Alysia D. Marino
University of Colorado Boulder
11 shared publications - E. D. Zimmerman
University of Colorado Boulder
11 shared publications - Laura Fields
University of Notre Dame
11 shared publications - Vittorio Paolone
University of Pittsburgh
11 shared publications - Yoshikazu Nagai
Eötvös Loránd University
11 shared publications
Latest Publications
- Open Access
- 3 June 2026
- Published by American Physical Society (APS) in Physical Review D
- Vol. 113 (11)
Measurement of exclusive π + -argon interactions using ProtoDUNE-SP
We present the measurement of π + -argon inelastic cross sections using the ProtoDUNE single-phase liquid argon time projection chamber in the incident π + kinetic energy range of 500–800 MeV in multiple exclusive channels (absorption, charge exchange, and the remaining inelastic interactions). The results of this analysis are important inputs to simulations of liquid argon neutrino experiments such as the Deep Underground Neutrino Experiment and the Short Baseline Neutrino program at Fermi National Accelerator Laboratory. They will be employed to improve the modeling of final state interactions within neutrino event generators used by these experiments, as well as the modeling of π + -argon secondary interactions within the liquid argon. This is the first measurement of π + -argon absorption at this kinetic energy range as well as the first ever measurement of π + -argon charge exchange.
- 3 June 2026
- Published by American Physical Society (APS) in Physical Review D
- Vol. 113 (11)
Open AccessMeasurement of exclusive π + -argon interactions using ProtoDUNE-SP
We present the measurement of π + -argon inelastic cross sections using the ProtoDUNE single-phase liquid argon time projection chamber in the incident π + kinetic energy range of 500–800 MeV in multiple exclusive channels (absorption, charge exchange, and the remaining inelastic interactions). The results of this analysis are important inputs to simulations of liquid argon neutrino experiments such as the Deep Underground Neutrino Experiment and the Short Baseline Neutrino program at Fermi National Accelerator Laboratory. They will be employed to improve the modeling of final state interactions within neutrino event generators used by these experiments, as well as the modeling of π + -argon secondary interactions within the liquid argon. This is the first measurement of π + -argon absorption at this kinetic energy range as well as the first ever measurement of π + -argon charge exchange.
- Open Access
- 29 August 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (8) , 1-16
Multiplicity and net-electric charge fluctuations in central Ar+Sc interactions at 13A, 19A, 30A, 40A, 75A, and 150$A\,\hbox {GeV}\!/\!c$ beam momenta measured by NA61/SHINE at the CERN SPSThis paper presents results on multiplicity fluctuations of positively and negatively charged hadrons as well as net-electric charge fluctuations measured in central Ar+Sc interactions at beam momenta 13A, 19A, 30A, 40A, 75A, and 150 $$A\,\hbox {GeV}\!/\!c$$ . The fluctuation analysis is one of the tools to search for the predicted critical point of strongly interacting matter. Results are corrected for the experimental biases and quantified using cumulant ratios. In most instances, multiplicity and net-charge distributions appear narrower than the corresponding Poisson or Skellam distributions. Cumulant ratios are compared with the Epos1.99 model predictions, which provide a qualitative description that aligns with observations for positively and negatively charged particles. The obtained results are also compared to earlier NA61/SHINE results from inelastic p+p interactions in the same analysis acceptance.- 29 August 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (8) , 1-16
Open AccessMultiplicity and net-electric charge fluctuations in central Ar+Sc interactions at 13A, 19A, 30A, 40A, 75A, and 150$A\,\hbox {GeV}\!/\!c$ beam momenta measured by NA61/SHINE at the CERN SPSThis paper presents results on multiplicity fluctuations of positively and negatively charged hadrons as well as net-electric charge fluctuations measured in central Ar+Sc interactions at beam momenta 13A, 19A, 30A, 40A, 75A, and 150 $$A\,\hbox {GeV}\!/\!c$$ . The fluctuation analysis is one of the tools to search for the predicted critical point of strongly interacting matter. Results are corrected for the experimental biases and quantified using cumulant ratios. In most instances, multiplicity and net-charge distributions appear narrower than the corresponding Poisson or Skellam distributions. Cumulant ratios are compared with the Epos1.99 model predictions, which provide a qualitative description that aligns with observations for positively and negatively charged particles. The obtained results are also compared to earlier NA61/SHINE results from inelastic p+p interactions in the same analysis acceptance. - Open Access
- 12 May 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 111 (9)
Supernova pointing capabilities of DUNE
The determination of the direction of a stellar core collapse via its neutrino emission is crucial for the identification of the progenitor for a multimessenger follow-up. A highly effective method of reconstructing supernova directions within the Deep Underground Neutrino Experiment (DUNE) is introduced. The supernova neutrino pointing resolution is studied by simulating and reconstructing electron-neutrino charged-current absorption on Ar 40 and elastic scattering of neutrinos on electrons. Procedures to reconstruct individual interactions, including a newly developed technique called “brems flipping,” as well as the burst direction from an ensemble of interactions are described. Performance of the burst direction reconstruction is evaluated for supernovae happening at a distance of 10 kpc for a specific supernova burst flux model. The pointing resolution is found to be 3.4 degrees at 68% coverage for a perfect interaction-channel classification and a fiducial mass of 40 kton, and 6.6 degrees for a 10 kton fiducial mass respectively. Assuming a 4% rate of charged-current interactions being misidentified as elastic scattering, DUNE’s burst pointing resolution is found to be 4.3 degrees (8.7 degrees) at 68% coverage. Published by the American Physical Society 2025
- 12 May 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 111 (9)
Open AccessSupernova pointing capabilities of DUNE
The determination of the direction of a stellar core collapse via its neutrino emission is crucial for the identification of the progenitor for a multimessenger follow-up. A highly effective method of reconstructing supernova directions within the Deep Underground Neutrino Experiment (DUNE) is introduced. The supernova neutrino pointing resolution is studied by simulating and reconstructing electron-neutrino charged-current absorption on Ar 40 and elastic scattering of neutrinos on electrons. Procedures to reconstruct individual interactions, including a newly developed technique called “brems flipping,” as well as the burst direction from an ensemble of interactions are described. Performance of the burst direction reconstruction is evaluated for supernovae happening at a distance of 10 kpc for a specific supernova burst flux model. The pointing resolution is found to be 3.4 degrees at 68% coverage for a perfect interaction-channel classification and a fiducial mass of 40 kton, and 6.6 degrees for a 10 kton fiducial mass respectively. Assuming a 4% rate of charged-current interactions being misidentified as elastic scattering, DUNE’s burst pointing resolution is found to be 4.3 degrees (8.7 degrees) at 68% coverage. Published by the American Physical Society 2025
- Open Access
- 7 May 2025
- Published by American Physical Society (APS) in Physical Review C
- Vol. 111 (5)
Measurement of the mass-changing, charge-changing, and production cross sections of , and nuclei in interactions at per nucleonA good knowledge of nuclear fragmentation cross sections is important to interpret the fluxes of secondary cosmic rays from the Galaxy. Here we report new measurements of nuclear fragmentation with the NA61/SHINE experiment at the CERN SPS. The specific focus is on cross sections important for the production of boron in the Galaxy from the interactions of C 12 nuclei with hydrogen in the interstellar medium, including the contribution from the decay of the short-lived C 11 fragments. The data were taken with the secondary C 12 beam at beam momentum of 13.5 GeV / c per nucleon and two fixed targets, polyethylene ( CH 2 ) and graphite (C), from which we derive the cross sections of carbon on hydrogen. We present the measurement of the fragmentation cross sections of C 11 , B 11 , and B 10 as well as the mass- and charge-changing cross sections. Published by the American Physical Society 2025
- 7 May 2025
- Published by American Physical Society (APS) in Physical Review C
- Vol. 111 (5)
Open AccessMeasurement of the mass-changing, charge-changing, and production cross sections of , and nuclei in interactions at per nucleonA good knowledge of nuclear fragmentation cross sections is important to interpret the fluxes of secondary cosmic rays from the Galaxy. Here we report new measurements of nuclear fragmentation with the NA61/SHINE experiment at the CERN SPS. The specific focus is on cross sections important for the production of boron in the Galaxy from the interactions of C 12 nuclei with hydrogen in the interstellar medium, including the contribution from the decay of the short-lived C 11 fragments. The data were taken with the secondary C 12 beam at beam momentum of 13.5 GeV / c per nucleon and two fixed targets, polyethylene ( CH 2 ) and graphite (C), from which we derive the cross sections of carbon on hydrogen. We present the measurement of the fragmentation cross sections of C 11 , B 11 , and B 10 as well as the mass- and charge-changing cross sections. Published by the American Physical Society 2025
- Open Access
- 25 March 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (3) , 1-5
Erratum to: Measurements of higher-order cumulants of multiplicity and net-electric charge distributions in inelastic proton-proton interactions by NA61/SHINE
- 25 March 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (3) , 1-5
Open AccessErratum to: Measurements of higher-order cumulants of multiplicity and net-electric charge distributions in inelastic proton-proton interactions by NA61/SHINE
- Open Access
- 14 November 2024
- Published by American Physical Society (APS) in Physical Review D
- Vol. 110 (9)
First measurement of the total inelastic cross section of positively charged kaons on argon at energies between 5.0 and 7.5 GeV
ProtoDUNE Single-Phase (ProtoDUNE-SP) is a 770-ton liquid argon time projection chamber that operated in a hadron test beam at the CERN Neutrino Platform in 2018. We present a measurement of the total inelastic cross section of charged kaons on argon as a function of kaon energy using 6 and 7 GeV / c beam momentum settings. The flux-weighted average of the extracted inelastic cross section at each beam momentum setting was measured to be 380 ± 26 mbarns for the 6 GeV / c setting and 379 ± 35 mbarns for the 7 GeV / c setting. Published by the American Physical Society 2024
- 14 November 2024
- Published by American Physical Society (APS) in Physical Review D
- Vol. 110 (9)
Open AccessFirst measurement of the total inelastic cross section of positively charged kaons on argon at energies between 5.0 and 7.5 GeV
ProtoDUNE Single-Phase (ProtoDUNE-SP) is a 770-ton liquid argon time projection chamber that operated in a hadron test beam at the CERN Neutrino Platform in 2018. We present a measurement of the total inelastic cross section of charged kaons on argon as a function of kaon energy using 6 and 7 GeV / c beam momentum settings. The flux-weighted average of the extracted inelastic cross section at each beam momentum setting was measured to be 380 ± 26 mbarns for the 6 GeV / c setting and 379 ± 35 mbarns for the 7 GeV / c setting. Published by the American Physical Society 2024
- Open Access
- 11 September 2024
- Published by Springer Nature in The European Physical Journal C
- Vol. 84 (9) , 1-17
Measurements of higher-order cumulants of multiplicity and net-electric charge distributions in inelastic proton–proton interactions by NA61/SHINE
This paper presents the energy dependence of multiplicity and net-electric charge fluctuations in p+p interactions at beam momenta 20, 31, 40, 80, and 158 $$\text{ Ge }\hspace{-1.00006pt}\text{ V }\!/\!c$$ . Results are corrected for the experimental biases and quantified with the use of cumulants and factorial cumulants. Cumulant ratios are an essential tool in the search for the critical point of strongly interacting matter in heavy ion collisions. Measurements performed in p+p interactions provide a vital baseline estimation in these studies. The measured signals are compared with the string hadronic models Epos1.99 and FTFP-BERT.- 11 September 2024
- Published by Springer Nature in The European Physical Journal C
- Vol. 84 (9) , 1-17
Open AccessMeasurements of higher-order cumulants of multiplicity and net-electric charge distributions in inelastic proton–proton interactions by NA61/SHINE
This paper presents the energy dependence of multiplicity and net-electric charge fluctuations in p+p interactions at beam momenta 20, 31, 40, 80, and 158 $$\text{ Ge }\hspace{-1.00006pt}\text{ V }\!/\!c$$ . Results are corrected for the experimental biases and quantified with the use of cumulants and factorial cumulants. Cumulant ratios are an essential tool in the search for the critical point of strongly interacting matter in heavy ion collisions. Measurements performed in p+p interactions provide a vital baseline estimation in these studies. The measured signals are compared with the string hadronic models Epos1.99 and FTFP-BERT. - Open Access
- 15 August 2024
- Published by Springer Nature in The European Physical Journal C
- Vol. 84 (8) , 1-17
$K^0_S$ meson production in inelastic p+p interactions at 31, 40 and 80 $\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$ beam momentum measured by NA61$/$SHINE at the CERN SPSThe yields of $$K^0_S$$ mesons have been measured in inelastic p+p interactions at incident projectile momenta of 31, 40 and 80 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ ( $$\sqrt{s_{NN}}=7.7, 8.8$$ and 12.3 $$\text {Ge}\hspace{-1.00006pt}\text {V}$$ , respectively). The data were recorded by the NA61 $$/$$ SHINE spectrometer at the CERN Super Proton Synchrotron and the $$K^0_S$$ mesons identified via their decays into $$\pi ^{+} \pi ^{-}$$ pairs. Double-differential distributions are presented as function of transverse momentum and rapidity. The mean multiplicities of $$K^0_S$$ mesons were determined to be $$(5.95 \pm 0.19 (stat) \pm 0.30 (sys)) \times 10^{-2}$$ at 31 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ , $$(7.61 \pm 0.13 (stat) \pm 0.43 (sys)) \times 10^{-2}$$ at 40 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ and $$(11.58 \pm 0.12 (stat) \pm 0.55 (sys)) \times 10^{-2}$$ at 80 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ . The results on $$K^{0}_{S}$$ production are compared with the production of charged kaons in corresponding reactions and with model calculations (Epos1.99, SMASH 2.0 and PHSD) as well as with published data from other experiments.- 15 August 2024
- Published by Springer Nature in The European Physical Journal C
- Vol. 84 (8) , 1-17
Open Access$K^0_S$ meson production in inelastic p+p interactions at 31, 40 and 80 $\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$ beam momentum measured by NA61$/$SHINE at the CERN SPSThe yields of $$K^0_S$$ mesons have been measured in inelastic p+p interactions at incident projectile momenta of 31, 40 and 80 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ ( $$\sqrt{s_{NN}}=7.7, 8.8$$ and 12.3 $$\text {Ge}\hspace{-1.00006pt}\text {V}$$ , respectively). The data were recorded by the NA61 $$/$$ SHINE spectrometer at the CERN Super Proton Synchrotron and the $$K^0_S$$ mesons identified via their decays into $$\pi ^{+} \pi ^{-}$$ pairs. Double-differential distributions are presented as function of transverse momentum and rapidity. The mean multiplicities of $$K^0_S$$ mesons were determined to be $$(5.95 \pm 0.19 (stat) \pm 0.30 (sys)) \times 10^{-2}$$ at 31 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ , $$(7.61 \pm 0.13 (stat) \pm 0.43 (sys)) \times 10^{-2}$$ at 40 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ and $$(11.58 \pm 0.12 (stat) \pm 0.55 (sys)) \times 10^{-2}$$ at 80 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ . The results on $$K^{0}_{S}$$ production are compared with the production of charged kaons in corresponding reactions and with model calculations (Epos1.99, SMASH 2.0 and PHSD) as well as with published data from other experiments. - Open Access
- 26 July 2024
- Published by Springer Nature in The European Physical Journal C
- Vol. 84 (7) , 1-22
Search for a critical point of strongly-interacting matter in central $^{40}$Ar + $^{45}$Sc collisions at 13 A–75 A GeV/c beam momentumThe critical point of strongly interacting matter is searched for at the CERN SPS by the NA61/SHINE experiment in central $$^{40}$$ Ar + $$^{45}$$ Sc collisions at 13 A, 19 A, 30 A, 40 A, and 75 A GeV/c. The dependence of the second-order scaled factorial moments of proton multiplicity distributions on the number of subdivisions in transverse momentum space is measured. The intermittency analysis uses statistically independent data sets for every subdivision in transverse and cumulative-transverse momentum variables. The results obtained do not indicate the searched intermittent pattern. An upper limit on the fraction of correlated protons and the intermittency index is obtained based on a comparison with the Power-law Model.- 26 July 2024
- Published by Springer Nature in The European Physical Journal C
- Vol. 84 (7) , 1-22
Open AccessSearch for a critical point of strongly-interacting matter in central $^{40}$Ar + $^{45}$Sc collisions at 13 A–75 A GeV/c beam momentumThe critical point of strongly interacting matter is searched for at the CERN SPS by the NA61/SHINE experiment in central $$^{40}$$ Ar + $$^{45}$$ Sc collisions at 13 A, 19 A, 30 A, 40 A, and 75 A GeV/c. The dependence of the second-order scaled factorial moments of proton multiplicity distributions on the number of subdivisions in transverse momentum space is measured. The intermittency analysis uses statistically independent data sets for every subdivision in transverse and cumulative-transverse momentum variables. The results obtained do not indicate the searched intermittent pattern. An upper limit on the fraction of correlated protons and the intermittency index is obtained based on a comparison with the Power-law Model. - Open Access
- 22 April 2024
- Published by Springer Nature in The European Physical Journal C
- Vol. 84 (4) , 1-54
Measurements of $\pi ^\pm $, $K^\pm $, p and $\bar{p}$ spectra in $^{40}\hbox {Ar+}^{45}\hbox {Sc}$ collisions at 13A to 150A $\text{ Ge }\hspace{-1.00006pt}\text{ V }\!/\!c$The NA61/SHINE experiment at the CERN Super Proton Synchrotron studies the onset of deconfinement in strongly interacting matter through a beam energy scan of particle production in collisions of nuclei of varied sizes. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions and mean multiplicities of $$\pi ^\pm $$ , $$K^\pm $$ , p and $$\bar{p}$$ produced in $$^{40}\hbox {Ar+}^{45}\hbox {Sc}$$ collisions at beam momenta of 13A, 19A, 30A, 40A, 75A and 150A $$\text{ Ge }\hspace{-1.00006pt}\text{ V }\!/\!c$$ . The analysis uses the 10% most central collisions, where the observed forward energy defines centrality. The energy dependence of the $$K^\pm $$ / $$\pi ^\pm $$ ratios as well as of inverse slope parameters of the $$K^\pm $$ transverse mass distributions are placed in between those found in inelastic $$p+p$$ and central Pb + Pb collisions. The results obtained here establish a system-size dependence of hadron production properties that so far cannot be explained either within statistical or dynamical models.- 22 April 2024
- Published by Springer Nature in The European Physical Journal C
- Vol. 84 (4) , 1-54
Open AccessMeasurements of $\pi ^\pm $, $K^\pm $, p and $\bar{p}$ spectra in $^{40}\hbox {Ar+}^{45}\hbox {Sc}$ collisions at 13A to 150A $\text{ Ge }\hspace{-1.00006pt}\text{ V }\!/\!c$The NA61/SHINE experiment at the CERN Super Proton Synchrotron studies the onset of deconfinement in strongly interacting matter through a beam energy scan of particle production in collisions of nuclei of varied sizes. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions and mean multiplicities of $$\pi ^\pm $$ , $$K^\pm $$ , p and $$\bar{p}$$ produced in $$^{40}\hbox {Ar+}^{45}\hbox {Sc}$$ collisions at beam momenta of 13A, 19A, 30A, 40A, 75A and 150A $$\text{ Ge }\hspace{-1.00006pt}\text{ V }\!/\!c$$ . The analysis uses the 10% most central collisions, where the observed forward energy defines centrality. The energy dependence of the $$K^\pm $$ / $$\pi ^\pm $$ ratios as well as of inverse slope parameters of the $$K^\pm $$ transverse mass distributions are placed in between those found in inelastic $$p+p$$ and central Pb + Pb collisions. The results obtained here establish a system-size dependence of hadron production properties that so far cannot be explained either within statistical or dynamical models.