Neutrino Shadow Play Neutrino interactions for oscillation measurements
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1 皮影 Shadow play Source: Neutrino Shadow Play Neutrino interactions for oscillation measurements Xianguo LU / 卢显国 University of Oxford INT-18-1a: Nuclear ab initio Theories and Neutrino Physics Seattle, 9 March 2018
2 THE Universe Matter & very little antimatter (matter-antimatter asymmetry) CP-Symmetry violation (CP violation) 2
3 Neutrino Oscillation v Flavor states (interaction states) v Neutrino mass: shift between interaction and propagation states 3
4 Neutrino Oscillation v v oscillation between flavor states as a function of time 4
5 Neutrino Oscillation v P(v ) + P(v ) = 1 v oscillation between flavor states as a function of time 5
6 Neutrino Oscillation v v P(v ) + P(v ) = 1 P(v ) + P(v ) = 1 v v oscillation between flavor states as a function of time If only 2 flavors, same oscillation behavior CP violation not observed 6
7 Neutrino CP violation v v P(ve) + P(v ) + P(v ) = 1 P(ve) + P(v ) + P(v ) = 1 *3-flavor paradigm *3-flavor paradigm v ve oscillation between flavor states as a function of time ~distance/energy v ve Oscillation property difference CP violation 7
8 The big picture of neutrino detection in oscillation measurements Nuclear Filter What we measure Event counts Final-state kinematics What we want to know about Number of neutrinos as a function of neutrino energy 8
9 Neutrino energy in GeV regiem static nucleon target 9
10 Quasi-elastic scattering (QE) Charged-Current Quasi-Elastic (CCQE) -/ /e/e+ / / e/ e W charged current (CC) l' N N' static nucleon target quasi-elastic (QE) N N' 10
11 Fermi motion biases E reconstruction nuclear target (bound nucleon) 11
12 Fermi motion biases E reconstruction Multinucleon correlations: cross section unknown, strong bias to all final-state kinematics initial correlation large relative motion Science 320 (2008)
13 Fermi motion biases E reconstruction Multinucleon correlations: cross section unknown, strong bias to all final-state kinematics initial correlation large relative motion nuclear target (bound nucleons) Science 320 (2008) In particle-hole excitation: Impulse approximation: independent particles (1p1h) RPA (random phase approximation): sum of 1p1h excitation (over all pairs) screening effect npnh (n 2): sub-leading terms in ph expansion short range correlations, meson exchange currents etc. 13
14 Fermi motion biases E reconstruction Multinucleon correlations: cross section unknown, strong bias to all final-state kinematics QE-like: absorbed in nucleus final-state interaction (FSI) charged current (CC) l' Resonance production (RES) e nuclear target CC1 + via production e W N QE-like N N' including resonance production (RES) N' followed by absorption 14
15 Fermi motion biases E reconstruction Multinucleon correlations: cross section unknown, strong bias to all final-state kinematics QE-like: absorbed in nucleus final-state interaction (FSI) FSI energy-momentum transferred in nucleus, possible nuclear emission charged current (CC) l' nuclear target nuclear emission QE-like N N' including resonance production (RES) N' followed by absorption 15
16 MINERvA Source: 16
17 MINERvA Nucl.Instrum.Meth. 676 (2012) 44-49, Nucl.Instrum.Meth. A743 (2014) Scintillator tracker Charged lepton: seen Proton: track 17
18 MINERvA Nucl.Instrum.Meth. 676 (2012) 44-49, Nucl.Instrum.Meth. A743 (2014) Scintillator tracker: Hydrocarbon (CH) target Homogeneous non-magnetized active tracker 18
19 Energy Diagram by M. Betancourt 19
20 Rev.Mod.Phys. 84 (2012) NuMI low energy beam <E > ~ 3 GeV L. Fields 20
21 Today's topic: -p mesonless production MINOS ND Observables: Transverse kinematics imbalances [XL, L. Pickering, S. Dolan et al., Phys.Rev. C94 (2016) no.1, ] Initial neutron momentum [A. Furmanski, J. Sobczyk, Phys.Rev. C95 (2017) no.6, ] 11 C* recoil Fermi motion n 21
22 A brief history of Shadow Art Cave of Pettakere, Bantimurung district (kecamatan), South Sulawesi, Indonesia. Hand stencils estimated between 35,000-40,000 BP 22
23 A brief history of Shadow Art Cueva de las Manos located Perito Moreno, Argentina. The art in the cave dates between 13,000-9,000 BP 23
24 A brief history of Shadow Art Traditional Chinese movie 24
25 A brief history of Shadow Art Japanese modern art 25
26 A brief history of Shadow Art Japanese modern art 26
27 Transverse kinematic imbalances a neutrino shadow play 27
28 Transverse kinematic imbalances a neutrino shadow play Source: To make Neutrino Shadow Play, we need beam of light screen 28
29 Transverse kinematic imbalances a neutrino shadow play Source: To make Neutrino Shadow Play, we need beam of light accelerator screen 29
30 Transverse kinematic imbalances a neutrino shadow play Source: To make Neutrino Shadow Play, we need beam of light accelerator screen transverse plane 30
31 Transverse kinematic imbalances a neutrino shadow play Source: Static nucleon target To make Neutrino Shadow Play, we need beam of light accelerator screen transverse plane 31
32 Transverse kinematic imbalances a neutrino shadow play Source: Nuclear target To make Neutrino Shadow Play, we need beam of light accelerator screen transverse plane 32
33 Transverse kinematic imbalances a neutrino shadow play Source: Nuclear target To make Neutrino Shadow Play, we need beam of light accelerator screen transverse plane 33
34 Transverse kinematic imbalances a neutrino shadow play Static nucleon target Convolution of Fermi motion and intranuclear momentum transfer due to FSI, resonance production, 2p2h etc. Nuclear target XL, L. Pickering, S. Dolan et al., Phys.Rev. C94 (2016) no.1,
35 Transverse kinematic imbalances a neutrino shadow play Convolution of Fermi motion and intranuclear momentum transfer due to FSI, resonance production, 2p2h etc. Nuclear target XL, L. Pickering, S. Dolan et al., Phys.Rev. C94 (2016) no.1,
36 EXTENSION: RADICAL SOLUTION TO NUCLEAR EFFECT PROBLEM 36
37 Lepton-proton interaction 3 charged particles: l p l' X Y Leading order realization in standard model: XL et al., Phys.Rev. D92 (2015) no.5,
38 Lepton-proton interaction 3 charged particles: l p l' X Y Leading order realization in standard model: XL et al., Phys.Rev. D92 (2015) no.5,
39 Lepton-proton interaction 3 charged particles: l p l' X Y Leading order realization in standard model: XL et al., Phys.Rev. D92 (2015) no.5,
40 Lepton-proton interaction 3 charged particles: l p l' X Y Leading order realization in standard model: XL et al., Phys.Rev. D92 (2015) no.5,
41 Phys.Rev. D92 (2015) no.5, Double-transverse momentum imbalance ptt H: 0 Heavier nuclei: irreducible symmetric broadening by Fermi motion O(200 MeV) further by FSI CHn: Hydrogen shape is only detector smearing. With good detector resolution, hydrogen yield can be extracted. With very good res., event-by-event selection of -H interaction is possible. XL et al., Phys.Rev. D92 (2015) no.5,
42 Pure hydrogen Technical requirement: bubble chamber (historical: 73, 79, 78, 82, 86) Chin. Phys. C 38, (2014) H2 Safety issue: explosive Since the use of a liquid H2 bubble chamber is excluded in the ND hall due to safety concerns,... [FERMILAB-PUB ] Neutrino interactions on hydrogen: In the last ~30 years there has been no new measurement Nuclear-effect independent measurement of neutrino energy 42
43 Extracting neutrino-hydrogen events from CH targets 2 better tracking res. arxiv: Toy simulation of T2K performance T2K neutrino flux on CH target Realistic detector resolution 43
44 Application in DUNE Slide from Hongyue Duyang U. of South Carolina 44
45 Application in DUNE Slide from Hongyue Duyang U. of South Carolina Background shape: constrained by multiple nuclear targets, especially carbon (graphite) 45
46 END OF EXTENSION BACK TO NUCLEAR EFFECT MEASUREMENT 46
47 A more general analysis of kinematic imbalance Transverse: Longitudinal: New variable: Neutrino energy is unknown (in the first place), equations are not closed. A. Furmanski, J. Sobczyk, Phys.Rev. C95 (2017) no.6,
48 A more general analysis of kinematic imbalance Assuming exclusive -p-a' final states Use energy conservation to close the equations Transverse: Longitudinal: New variable: pn: recoil momentum of the nuclear remnant Neutrino energy is unknown (in the first place), equations are not closed. A. Furmanski, J. Sobczyk, Phys.Rev. C95 (2017) no.6,
49 A more general analysis of kinematic imbalance Assuming exclusive -p-a' final states Use energy conservation to close the equations Transverse: Longitudinal: New variable: pn: recoil momentum of the nuclear remnant Neutrino energy is unknown (in the first place), equations are not closed. For CCQE, A' = 11C* No more unknowns pn: neutron Fermi motion 11 C* recoil Fermi motion n A. Furmanski, J. Sobczyk, Phys.Rev. C95 (2017) no.6,
50 Signal definition: Charged current One muon and at least one proton in the restricted final-state phase space No mesons Measurement: Data sample: NuMI low energy neutrino data, POT Interaction target: tracker (mostly CH) Event selection Background estimation and subtraction Unfolding Efficiency correction Flux integrated cross section as results Focus today 50
51 Simulation: GENIE [Nucl.Instrum.Meth. A614 (2010) ] Nominal: version global Fermi Gas (RFG) model with Bodek-Ritchie (BR) tail [Phys. Rev. D 23, 1070 (1981)] ha FSI [AIP Conf.Proc (2011) ] No-FSI: Nominal without FSI 51
52 Simulation: GENIE [Nucl.Instrum.Meth. A614 (2010) ] Nominal: version global Fermi Gas (RFG) model with Bodek-Ritchie (BR) tail [Phys. Rev. D 23, 1070 (1981)] ha FSI [AIP Conf.Proc (2011) ] No-FSI: Nominal without FSI MnvGENIE-v1: GENIE MINERvA Tune (v1) [only 2p2h relevant for this analysis] Added Random Phase Approximation (RPA) [Phys.Rev. C70 (2004) ] Non-resonance pion production scaled down by 75% [Phys.Rev. D90 (2014) no.11, ] Valencia 2p2h [Nieves et al., Phys.Lett. B707 (2012) 72-75, Phys. Rev. C 86, (2012), Phys.Rev. D88 (2013) no.11, , arxiv: ] tuned to MINERvA inclusive data significant enhancement in small 4-momentum transfer region [Phys.Rev.Lett. 116 (2016) ] Phys.Rev.Lett. 116 (2016) Science 320 (2008) representing energy transfer from the neutrino to the target 52
53 Simulation: GENIE [Nucl.Instrum.Meth. A614 (2010) ] Nominal: version global Fermi Gas (RFG) model with Bodek-Ritchie (BR) tail [Phys. Rev. D 23, 1070 (1981)] ha FSI [AIP Conf.Proc (2011) ] No-FSI: Nominal without FSI MnvGENIE-v1: GENIE MINERvA Tune (v1) [only 2p2h relevant for this analysis] Added Random Phase Approximation (RPA) [Phys.Rev. C70 (2004) ] Non-resonance pion production scaled down by 75% [Phys.Rev. D90 (2014) no.11, ] Valencia 2p2h [Nieves et al., Phys.Lett. B707 (2012) 72-75, Phys. Rev. C 86, (2012), Phys.Rev. D88 (2013) no.11, , arxiv: ] tuned to MINERvA inclusive data significant enhancement in small 4-momentum transfer region [Phys.Rev.Lett. 116 (2016) ] Detector simulation: GEANT4 (4.9.2) GENIE used in other experiments (e.g. NOvA, T2K, BooNE, DUNE) This analysis: GENIE MINERvA Tune (v1) used in cross section extraction 53
54 RESULTS: Flux integrated cross section 54
55 Single-Particle Kinematics Muon momentum, angle Good description by GENIE MINERvA Tune (v1) All predictions have same shape 55
56 Single-Particle Kinematics Muon momentum, angle Proton momentum, angle GENIE Nominal and No-FSI have different shape GENIE MINERvA Tune (v1) excess at high angle 56
57 FSI decomposition in mesonless proton production: Proton FSI: Non-interacting (no change of energy and direction of the proton) Acceleration: energy of proton increased after FSI Deceleration: energy of proton decreased after FSI Pion FSI: pion absorption charged current (CC) l' charged current (CC) l' nuclear target nuclear target nuclear emission 57
58 Single-Particle Kinematics Muon momentum, angle Proton momentum, angle Proton FSI acceleration localized at high angle Pionless resonant production dominates low angle 58
59 NUCLEAR EFFECT DIAGNOSTICS 59
60 A more general analysis of kinematic imbalance Assuming exclusive -p-a' final states Use energy conservation to close the equations Transverse: Longitudinal: New variable: pn: recoil momentum of the nuclear remnant Neutrino energy is unknown (in the first place), equations are not closed. For CCQE, A' = 11C* No more unknowns pn: neutron Fermi motion 11 C* recoil Fermi motion n A. Furmanski, J. Sobczyk, Phys.Rev. C95 (2017) no.6,
61 Nuclear Effect Diagnostics CCQE with Fermi motion Fermi Gas model prediction pn is Fermi motion magnitude QE peak GENIE No-FSI 11 C* recoil Bodek-Ritchie tail Fermi motion n 61
62 Nuclear Effect Diagnostics CCQE with Fermi motion pn is Fermi motion magnitude QE peak GENIE No-FSI p-fsi Non-interacting 11 C* recoil Fermi motion n 62
63 Nuclear Effect Diagnostics CCQE with Fermi motion Fermi Gas model prediction pn is Fermi motion magnitude QE peak GENIE No-FSI p-fsi Non-interacting 11 C* recoil Bodek-Ritchie tail Fermi motion n QE peak dominated by CCQE without FSI Direct constraint of Fermi motion 63
64 Fermi motion only For CCQE, A' = 11C* No more unknowns pn: neutron Fermi motion T is Fermi motion direction isotropic 64
65 Nuclear Effect Diagnostics CCQE with Fermi motion Fermi motion only T is Fermi motion direction isotropic GENIE No-FSI 65
66 Nuclear Effect Diagnostics CCQE with Fermi motion Fermi motion only T is Fermi motion direction isotropic GENIE No-FSI p-fsi Non-interacting 66
67 Nuclear Effect Diagnostics CCQE with Fermi motion Fermi motion only T is Fermi motion direction isotropic GENIE No-FSI p-fsi Non-interacting Baseline for all non-fermi motion effects Factor out Fermi motion uncertainty Complementary to pn 67
68 pt (nuclear effects) boosting outgoing proton With full nuclear effects Intranuclear momentum transfer pt (nuclear effects) dragging outgoing proton Baseline for all non-fermi motion effects Factor out Fermi motion uncertainty Complementary to pn 68
69 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration pt (nuclear effects) dragging outgoing proton Deceleration at large T 69
70 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration pt (nuclear effects) boosting outgoing proton Deceleration at large T Acceleration at both small and (due to transverse projection) large T 70
71 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration pt (nuclear effects) boosting outgoing proton Only acceleration can enter small T Deceleration at large T Acceleration at both small and (due to transverse projection) large T 71
72 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration Acceleration to the left of QE peak Strongly distort QE peak 11 C* recoil Fermi motion n 72
73 A more general analysis of kinematic imbalance Assuming exclusive -p-a' final states Use energy conservation to close the equations Transverse: Longitudinal: New variable: pn: recoil momentum of the nuclear remnant Neutrino energy is unknown (in the first place), equations are not closed. For RES, DIS, 2p2h, no longer exclusive -p-a' final states 11 C* recoil Fermi motion n Fermi motion Intranuclear momentum transfer A. Furmanski, J. Sobczyk, Phys.Rev. C95 (2017) no.6,
74 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration Pionless resonant production, pion absorption FSI, and 2p2h pn: smeared pt beyond QE peak tail -FSI Absorption 11 C* recoil Fermi motion p small p large n Pion production and 2p2h process: strong intra-nuclear momentum transfer due to momentum sharing with proton 74
75 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration Pionless resonant production, pion absorption FSI, and 2p2h pn: smeared pt beyond QE peak tail -FSI Absorption 2p2h (= MnvGENIE-v1 GENIE Nominal) 11 C* recoil Fermi motion p small p large n Pion production and 2p2h process: strong intra-nuclear momentum transfer due to momentum sharing with proton 75
76 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration Pionless resonant production, pion absorption FSI, and 2p2h GENIE describes the tail reasonably well due to large contribution from 2p2h tuned to MINERvA inclusive measurements pn: smeared pt beyond QE peak tail -FSI Absorption 2p2h (= MnvGENIE-v1 GENIE Nominal) 11 C* recoil Fermi motion p small p large n Pion production and 2p2h process: strong intra-nuclear momentum transfer due to momentum sharing with proton 76
77 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration Pionless resonant production, pion absorption FSI, and 2p2h pt (nuclear effects) dragging outgoing proton Proton momentum shared by others, decelerated large T region -FSI Absorption 77
78 Nuclear Effect Diagnostics CCQE with Fermi motion FSI deceleration vs. acceleration Pionless resonant production, pion absorption FSI, and 2p2h pt (nuclear effects) dragging outgoing proton Proton momentum shared by others, decelerated large T region -FSI Absorption 2p2h (= MnvGENIE-v1 GENIE Nominal) 78
79 ADVANCED TOPICS: GENIE FSIs 79
80 Advanced Topics: GENIE FSIs (pre2015) ha: effective model, include elastic component in intranuclear scattering, used in GENIE MINERvA Tune (v1) ha2015: removed elastic component, replacing ha in MnvGENIE-v1-hA2015 No p-fsi acceleration 80
81 Advanced Topics: GENIE FSIs (pre2015) ha: effective model, include elastic component in intranuclear scattering, used in GENIE MINERvA Tune (v1) ha2015: removed elastic component, replacing ha in MnvGENIE-v1-hA2015 No p-fsi acceleration QE peak not distorted, but much narrower 81
82 Advanced Topics: GENIE FSIs (pre2015) ha: effective model, include elastic component in intranuclear scattering, used in GENIE MINERvA Tune (v1) ha2015: removed elastic component, replacing ha in MnvGENIE-v1-hA2015 hn2015: full cascades + Oset, replacing ha in MnvGENIE-v1-hN2015 ha2015 and hn2015 difference in Large (concentrated) T p tail (diluted) n 82
83 ADVANCED TOPICS: NUWRO 83
84 Simulation: GENIE [Nucl.Instrum.Meth. A614 (2010) ] Nominal: version global Fermi Gas (RFG) model with Bodek-Ritchie (BR) tail [Phys. Rev. D 23, 1070 (1981)] ha FSI [AIP Conf.Proc (2011) ] No-FSI: Nominal without FSI MnvGENIE-v1: GENIE MINERvA Tune (v1) [only 2p2h relevant for this analysis] Added Random Phase Approximation (RPA) [Phys.Rev. C70 (2004) ] Non-resonance pion production scaled down by 75% [Phys.Rev. D90 (2014) no.11, ] Valencia 2p2h [Nieves et al., Phys.Lett. B707 (2012) 72-75, Phys. Rev. C 86, (2012), Phys.Rev. D88 (2013) no.11, , arxiv: ] tuned to MINERvA inclusive data significant enhancement in small 4-momentum transfer region [Phys.Rev.Lett. 116 (2016) ] Simulation: NuWro [Phys.Rev. C86 (2012) ] Version: 11q Local Fermi Gas (LFG) or Spectral Function (SF) [Benhar et al., Nucl.Phys. A579 (1994) ] FSI: intranuclear cascades of hadronic interactions + Oset model [Nucl.Phys. A484 (1988) ] Valencia 2p2h [Nieves et al., Phys.Lett. B707 (2012) 72-75, Phys. Rev. C 86, (2012)] 84
85 Advanced Topics: NuWro Fermi motion Fermi motion p small (intranuclear momentum transfer) p large SF describes Fermi motion very well 85
86 Advanced Topics: NuWro Fermi motion Resonance / 2p2h strength p small (intranuclear momentum transfer) p large SF describes Fermi motion very well Resonance / 2p2h lacks of local strength 86
87 ADVANCED TOPICS: COMPARISON TO T2K 87
88 Advanced Topics: Comparison to T2K [arxiv: ] *same target, slight difference in signal phase space definition T Rev.Mod.Phys. 84 (2012) arxiv: (regularized) NuMI LE <E > ~ 3 GeV L. Fields MINERvA-T2K difference mainly due to RES: Very small resonance contribution at T2K 88
89 Advanced Topics: Comparison to T2K [arxiv: ] *same target, slight difference in signal phase space definition T Rev.Mod.Phys. 84 (2012) NuMI LE <E > ~ 3 GeV L. Fields MINERvA-T2K difference mainly due to RES Fermi motion (isotropic) baseline consistent 89
90 Advanced Topics: Comparison to T2K [arxiv: ] *same target, slight difference in signal phase space definition T pt Only differ by longitudinal momentum imbalance pn has better resolution 90
91 Advanced Topics: Comparison to T2K [arxiv: ] *same target, slight difference in signal phase space definition T pt Rev.Mod.Phys. 84 (2012) NuMI LE <E > ~ 3 GeV L. Fields MINERvA-T2K difference mainly due to RES The QE peaks are consistent 91
92 Summary and Outlook 92
93 Summary and Outlook 93
94 Summary and Outlook Muon-proton mesonless production at MINERvA 2014: LE neutrino beam, CH target 2016: LE neutrino beam, CH + nuclear targets This analysis: LE neutrino beam, CH ( POT) 20 Future: medium energy neutrino beam CH + nuclear targets (E ~ 6 GeV, POT) In this analysis, we have shown Single-particle kinematics (muon and proton momentum and angle) Transverse kinematic imbalances (, p ) T T Initial neutron momentum (p ) n 11 C* recoil Fermi motion n 94
95 Summary and Outlook Muon-proton mesonless production at MINERvA 2014: LE neutrino beam, CH target 2016: LE neutrino beam, CH + nuclear targets This analysis: LE neutrino beam, CH ( POT) 20 Future: medium energy neutrino beam CH + nuclear targets (E ~ 6 GeV, POT) In this analysis, we have shown Single-particle kinematics (muon and proton momentum and angle) Transverse kinematic imbalances (, p ) T T Initial neutron momentum (p ) n By rearranging final-stat kinematics, nuclear effects can be diagnosed: pn strong constraint to Fermi motion T factors out Fermi motion uncertainty and have direct sensitivity to FSI 95
96 Summary and Outlook Muon-proton mesonless production at MINERvA 2014: LE neutrino beam, CH target 2016: LE neutrino beam, CH + nuclear targets This analysis: LE neutrino beam, CH ( POT) 20 Future: medium energy neutrino beam CH + nuclear targets (E ~ 6 GeV, POT) In this analysis, we have shown Single-particle kinematics (muon and proton momentum and angle) Transverse kinematic imbalances (, p ) T T Initial neutron momentum (p ) n By rearranging final-stat kinematics, nuclear effects can be diagnosed: pn strong constraint to Fermi motion T factors out Fermi motion uncertainty and have direct sensitivity to FSI Interesting observation: GENIE MINERvA Tune (v1) Describes data well to first order Critical component is Valencia 2p2h tuned to MINERvA inclusive data NuWro SF provides very good description of data 96
97 Summary and Outlook Muon-proton mesonless production at MINERvA 2014: LE neutrino beam, CH target 2016: LE neutrino beam, CH + nuclear targets This analysis: LE neutrino beam, CH ( POT) 20 Future: medium energy neutrino beam CH + nuclear targets (E ~ 6 GeV, POT) In this analysis, we have shown Single-particle kinematics (muon and proton momentum and angle) Transverse kinematic imbalances (, p ) T T Initial neutron momentum (p ) n New developments Transverse kinematic imbalances New system to solve the nuclear effect problem in neutrino interaction most relevant for oscillation measurements Radical approach double transverse kinematic imbalance [Phys. Rev. D 92, (R)] First measurement of Furmanski-Sobczyk initial neutron momentum diagnostic power Practically efficient way to select pure CCQE events (beyond the scope of this talk) 97
98 谢谢! Source: 98
99 BACKUP 99
100 Selected Sample Data-MC comparison at reconstructed level after sideband fit GENIE MINERvA Tune (v1) describes data well (to first order) Large concentration of pure QE at high angle GENIE excess above data beyond 60 deg (see discussion later slides) 100
101 Selected Sample Data-MC comparison at reconstructed level after sideband fit GENIE MINERvA Tune (v1) describes data well (to first order) Depletion at small T GENIE excess at T 180 deg. 101
102 Selected Sample 11 C* recoil Data-MC comparison at reconstructed level after sideband fit Fermi motion n Strong separation of pure QE Double-peak structure, very strong in GENIE 102
103 103
104 104
105 66.4 deg arxiv:
106 END 106
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