EMPHATIC A new hadron production experiment for improved neutrino - PowerPoint PPT Presentation

EMPHATIC A new hadron production experiment for improved neutrino flux predictions Jonathan Paley On Behalf of the EMPHATIC Collaboration Fermilab Physics Advisory Committee Meeting January 17, 2019 Jonathan M. Paley

DUNE Flux Uncertainties plots from Leo Aliaga • Dominant flux uncertainties come from 40% xsec uncertainties on secondary protons interacting in non-carbon materials in the target and horns. • Lack of proton and pion scattering data at lower beam energies that NA61 cannot obtain. • Reduction of flux uncertainties improves physics reach of most DUNE near detector analyses. New hadron production measurements support the DUNE oscillation program by increasing confidence in the flux a-priori predictions and ND measurements. � 2 Jonathan M. Paley

DUNE Flux Uncertainties - Can we do better? • Reasonable assumptions: • Inelastic cross sections: • No improvement for pions (5%) • 10% uncertainty for kaons (currently 60-90% for p<4 GeV/c, 12% for p>4 GeV/c) • 10% on p + C[Fe,Al] —> p + X (down from 40%) • 10% on π [K] + C[Fe,Al] —> π ± + X (down from 40%) • 20% on π [K] + C[Fe,Al] —> K ± + X (down from 40%) Before After Jonathan M. Paley

EMPHATIC • E xperiment to M easure the P roduction of H adrons A t a T est beam I n C hicagoland • Uses the FNAL Test Beam Facility (FTBF), either MTest or MCenter • Table-top size experiment, focused on hadron production measurements with p beam < 15 GeV/c, but will also measure 120 GeV/c p+C. • International collaboration, with involvement of experts from NOvA/DUNE and T2K/HK • Ultimate design: • compact size reduces overall cost • high-rate DAQ, precision tracking and timing � 4 Jonathan M. Paley

EMPHATIC • E xperiment to M easure the P roduction of H adrons A t a T est beam I n C hicagoland • Uses the FNAL Test Beam Facility (FTBF), either MTest or MCenter • Table-top size experiment, focused on hadron production measurements with p beam < 15 GeV/c, but will also measure 120 GeV/c p+C. • International collaboration, with involvement of experts from NOvA/DUNE and T2K/HK • Ultimate design: • compact size reduces overall cost • high-rate DAQ, precision tracking and timing � 5 Jonathan M. Paley

EMPHATIC: Initial beam test from Jan. 10-23, 2018 • Proof-of-principle/engineering run enabled primarily by 2017 US-Japan funds • Japan: aerogel detectors, emulsion films and associated equipment, travel • US: emulsion handling facility at Fermilab • Critical DAQ, motion table and manpower contributions from TRIUMF • ~20M beam Pb- Aerogel Gas Target triggers Threshold Glass Ckov SSDs SSDs Material collected in ~7 Ckov Calo Detectors, days of running Scint. Trigger • Beams of p, π at 20,31,120 GeV • Targets: C, Al and Fe (+ MT) ~2m � 6 Jonathan M. Paley

MT6.1-A Si strip detectors Si strip detectors Trigger counter Si pixel detectors Space for target EMPHATIC: Initial beam test from Jan. 10-23, 2018 MT6.1-A � 7 Jonathan M. Paley

MT6.1-B Lead glass CH counter (L~50cm) Aerogel CH counters n=1.013 n=1.045 n=1.026 EMPHATIC: Initial beam test from Jan. 10-23, 2018 MT6.1-B � 8 Jonathan M. Paley

613 PROTON-NUCLEI CROSS SECTIONS scattering was less than 10~o of that due to single scattering. At larger angles the relative importance of plural scattering decreased rapidly and became smaller than 1 ~o at O > 5 mrad. Multiple and plural scatterings were evaluated with the Moli6re theory, using the formulae given by Bethe and Ashkin s). The data presented below 10"2'~ O.T" LiSand LiT ] ~e -74t Po = 19.3 GeV/c [~,~,~% 613 PROTON-NUCLEI CROSS SECTIONS _j 10 "221 ~'~''~ i-- ~'~ • L i 7 • ',Li 6 scattering was less than 10~o of that due to single scattering. At larger angles the ! e-;-'%: : , I relative importance of plural scattering decreased rapidly and became smaller than 613 PROTON-NUCLEI CROSS SECTIONS 1 ~o at O > 5 mrad. Multiple and plural scatterings were evaluated with the Moli6re ][ • s V e-l°t / theory, using the formulae given by Bethe and Ashkin s). The data presented below 10-23/ , i ..J_ .... L__/= i scattering was less than 10~o of that due to single scattering. At larger angles the ~ e-77t relative importance of plural scattering decreased rapidly and became smaller than 10"2'~ O.T" LiSand LiT ] Be 9 1 ~o at O > 5 mrad. Multiple and plural scatterings were evaluated with the Moli6re Po = 19.3 GeV/c ~e -74t Po = 19.3 GeV/c [~,~,~% theory, using the formulae given by Bethe and Ashkin s). The data presented below _j 10 "221 ~'~''~ i-- ~'~ • L i 7 • ',Li 6 @ 10"2'~ O.T" LiSand LiT ] )°~21 "~" " ) ! e-;-'%: : , I e-10 t ~e -74t Po = 19.3 GeV/c [~,~,~% ][ • s V e-l°t _j 1023 I / I " P I I I_ i "/)~T I 10 "221 ~'~''~ i-- ~'~ • L i 7 • ',Li 6 u 10-23/ , i ..J_ .... L__/= i ~ e-77t C 12 ! e-;-'%: : , I 3 /0.1". Po = 21.5 GeV/c Be 9 10 -2~ ][ • s V e-l°t Po = 19.3 GeV/c / b 10-23/ , i ..J_ .... L__/= i ~ e-77t 10 .22 @ Be 9 )°~21 "~" " EMPHATIC: Thin-target data w/ silicon tracking only ) Po = 19.3 GeV/c e-10 t • ~ e-10t , 1023 I 10 "23 I " P I I I_ i "/)~T t [ I l I [ ' I L "= I Total xsec from optical theorem @ u )°~21 "~" " ) C 12 At 27 3 /0.1". e-10 t Po = 21.5 GeV/c 10_21 Po = 19.3 GeV/c ~r~. e "m t 10 -2~ 1023 I I " P I I I_ i "/)~T b I Coherent elastic scattering u QE scattering C 12 (off a single 3 /0.1". 10 .22 10 22 l ~ " Po = 21.5 GeV/c • -lOt • ) nucleon) 10 -2~ • , ~ e-10t b I I _ I _2___L~L__~ I I 10 "23 t [ I l I [ ' I L "= 1023 I I I 10 .22 0 0.02 0.04 0.06 0.08 0.10 0.12 Itl (GeV/c) = -" (GeV/@ At 27 • , ~ e-10t 10_21 Po = 19.3 GeV/c G. Bellettini et al., Nucl. Phys. 79, 609 (1966) ~r~. e "m t Fig. 2. Differential cross sections plotted as a function of the four-momentum transfer squared; 10 "23 t [ I l I [ ' I L "= | t | ' p 2 beam θ 2 Black dots: experimental results; open circles: experimental cross sections after subtraction of scatt the Coulomb contribution; O.T.: optical theorem cross section evaluated using total cross sections At 27 of table 1. For each element the steep line fitting the first points gives the nuclear form factor. The 10 22 l ~ " lines through the points with the largest values of It[ all have the slope, (10 (GeV/c)=), exhibited 10_21 Po = 19.3 GeV/c • -lOt � 9 Jonathan M. Paley ~r~. e "m t • ) by the proton-proton differential cross section. I I _ I _2___L~L__~ I I 1023 I I I 0 0.02 0.04 0.06 0.08 0.10 0.12 10 22 l ~ " • -lOt • ) Itl (GeV/c) = -" (GeV/@ Fig. 2. Differential cross sections plotted as a function of the four-momentum transfer squared; I I _ I _2___L~L__~ I I 1023 I I I Black dots: experimental results; open circles: experimental cross sections after subtraction of 0 0.02 0.04 0.06 0.08 0.10 0.12 the Coulomb contribution; O.T.: optical theorem cross section evaluated using total cross sections Itl (GeV/c) = -" (GeV/@ of table 1. For each element the steep line fitting the first points gives the nuclear form factor. The lines through the points with the largest values of It[ all have the slope, (10 (GeV/c)=), exhibited Fig. 2. Differential cross sections plotted as a function of the four-momentum transfer squared; by the proton-proton differential cross section. Black dots: experimental results; open circles: experimental cross sections after subtraction of the Coulomb contribution; O.T.: optical theorem cross section evaluated using total cross sections of table 1. For each element the steep line fitting the first points gives the nuclear form factor. The lines through the points with the largest values of It[ all have the slope, (10 (GeV/c)=), exhibited by the proton-proton differential cross section.

EMPHATIC: Thin-target data w/ silicon tracking only 4-momentum transfer (raw data) Preliminary p + C @ 30 GeV/c Coulomb-nuclear interference region (CNI) Elastic region Quasi-elastic region *Lines on top of the data points are not fits 23 Data are being analyzed, systematics under assessment, but most look to be <5%. � 10 Jonathan M. Paley

EMPHATIC: Thin-target data w/ silicon tracking only 4-momentum transfer (raw data) Preliminary p + C @ 30 GeV/c Rapid progress on Coulomb-nuclear interference region (CNI) the analysis, aiming Elastic region Quasi-elastic region for publication of these results soon. *Lines on top of the data points are not fits Data are being analyzed, systematics under assessment, but most look to be <5%. � 11 Jonathan M. Paley