ڀݚ ˙հ CERN SPS Λ༻λχϡʔτϦϊଌఆͱ৽ཧ୳ࡧɿ SHiP ܭը + DsTau/NA65 ݧa University of Bernɼ b भେɼ c ݹେɼ d ذෞେ ༗լ ত وa ɼ༗լ ஐ ࢠb ɼখদ խ c ɼ ౻ࠤम c ɼ٢ຊ խ ߒd [email protected]ɼ[email protected]ɼkomatsu@flab.phys.nagoya-u.ac.jpɼ sato@flab.phys.nagoya-u.ac.jpɼ[email protected] 2020 ( 2 )2 1 ཧഎ ܠஶΒɼ CERN ͷ Super Proton Synchrotron (SPS) Λ༻ɼҎԼ 1.1-1.3 Ͱड़ΔཧΛٻΔɻ ͰຊͷಘҙͱΔज़ੜΔɻ 1.1 λχϡʔτϦϊཚʹΔϨϓτϯ วͷݕ λχϡʔτϦϊ 3 ΔχϡʔτϦϊͷதͰ ୈ 3 ʹҐஔΔɻͷੜͱݕग़ࠔͰɼ Αͷݕग़ज़ΔɻΕ·Ͱ ʹ DONuTɼOPERAɼSuper-KɼIceCube ݧλ χϡʔτϦϊͷ؍ଌΛใࠂΔɻͷதͰχϡʔ τϦϊৼಈΛհͳతͳଌఆ DONuT ݧ ͰΔɻΕΕͷଌఆՌෆఆେɼλ χϡʔτϦϊʹͷجຊతͳʹ ݧతʹཧղΕͳɻਤ 1 ࡏݱʹಘΒΕΔχϡʔ τϦϊԠஅ໘ΛɻϛϡʔχϡʔτϦϊʹ 2%ఔͱਫ਼ΑଌΒΕΔɻଞɼλχϡʔ τϦϊʹ 50%ҎͷෆఆΔɻ ΕχϡʔτϦϊཚʹΔϨϓτϯวݕͷ ݶքΛΊΔɻ ϨϓτϯวΕ·ͰͷʹلΘΔʑͳ ʹݧΕɻࠓͰૉࢠඪ४ཧʹ Δ “sacred principle”ʢͳΔݪཧʣͱडೖΕ ΒΕΔɻʹݱਤ 1 ͷՌଌఆਫ਼ͷғͰว ΓΔͱݴΔɻϨϓτϯวΛ৴ ΔͳΒλχϡʔτϦϊଞͷ 2 ͱಉ ͰΓɼ৽ཧͳͷΕͳɻ χϡʔτϦϊৗʹզʑΛڻΛ ɻਓΑಘλχϡʔτϦϊݕग़ͷ ज़Λʹثୈ 3 ͷϨϓτϯʹ৽ཧͷՄ /GeV) 2 cm -40 10 × ( const σ 0 20 40 60 80 100 120 e ν μ ν τ ν DONuT DONuT with n=6.1 from Pythia 6 (main systematic uncertainty not included) SM ਤ 1: 3 ͷχϡʔτϦϊͷ ν ɼ ν ฏۉඇཚ Ԡஅ໘ [1]ɻԣઢඪ४ཧΒ༧ଌΕΔɻ Λ୳ͷ৺༂ΔࢼΈͰΔɻ ෳͷίϥΠμʔʹݧΑʮୈ 3 ͷࢠΘΔաఔͰϨϓτϯวΕΔ ΕͳʯͱݧՌใࠂΕΔɻ b ΫΥʔΫΛΉࢠͷηϛϨϓτχοΫյʹ λյΔͱϛϡʔΦϯյΔ ͷൺɼR(D (∗) )= Γ(B→D (∗) τ ντ ) Γ(B→D (∗) l ν) ɼཧ༧ΑΓଟ ͱใࠂΕΔ [2] (BaBarɼBelleɼLHCb ͷ ՌΑΓɼ2019 Ͱ 3.1σ ͷ༗ҙ)ɻಉͷஹ b → s�� (B 0 → K ∗0 ��ɼB + → K + ��) Β ΕΔɻΕΒͷηϛϨϓτχοΫյ tree-level ͰͷաఔͰΓͷҧϨϓτϯͱͳΔ ΊɼΕΕͷյͷൺਖ਼ʹܭͰΔɻ ΕΒͷݧՌඪ४ཧͰઆɼ“Flavor anomalies” ͱݺΕΔΑʹͳΔɻͷΞϊϚ Ϧʔʹର৽ཧͷଘࡏ׆ʹΕɼ· ݧత༗ҙͷɾ൱ఆʹଟ໘ΒͳΕ Δɻ Ε·ͰͷใࠂࢠͷյΛ༻ݧΒͷΈͰ 115
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5
GroundBIRD CMB
GroundBIRD
CMB
[17]
CMB
CMB
GroundBIRD
CMB GroundBIRD
KEK
IAC
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1
CERN SPS
SHiP + DsTau/NA65
aUniversity of Bern b c d
a b c c d
[email protected] [email protected] [email protected]
[email protected] [email protected]
2020 ( 2 ) 2
1
CERN Super Proton Synchrotron (SPS)
1.1-1.3
1.1
3
3
DONuT OPERA Super-K IceCube
DONuT
1
2%
50%
“sacred principle”
1
2
3
/GeV
)2
cm
-40
10× (co
nst
σ
0
20
40
60
80
100
120
eν μντν
DO
NuT
DO
NuT
with
n=6
.1 fr
om P
ythi
a 6
(mai
n sy
stem
atic
unc
erta
inty
not
incl
uded
)
SM
1: 3 ν ν
[1]
3
b
R(D(∗)) = Γ(B→D(∗)τντ )Γ(B→D(∗)lν)
[2] (BaBar Belle LHCb
2019 3.1σ )
b → s�� (B0 → K∗0�� B+ → K+��)
tree-level
“Flavor
anomalies”
115
2
1
CERN SPS
400 GeV
DsTau
SHiP
1 DONuT
(>50%) (9 ) (33%)
2
Ds (cs
cs) Ds → τντ
τ → ντX DONuT
Ds
Ds
DsTau
10%
SHiP 10,000
2%
400 GeVproton
�� production target(e.g. tungsten)
charged particle sweeping,neutron absorption
�� beam
�
�� ���
�� �
��proton
�� production���
�
�� detection
≃5mm
�� acceptance ~ 5%
≃5mm
�� detector
2:
2 10%
10–150 GeV
Super-K Hyper-K
1.2 Hidden Sector
LHC
SHiP
(Search for Hidden Particle) CERN SPS
Beam Dump Facility (BDF) charm
beauty hidden sector
particle Hid-
den Sector (HS) decay spectrometer
Light Dark Matter (LDM)
Scattering and Neutrino De-
tector(SND) 3
3: SHiP :
sweep Active Muon shield
Scattering and Neutrino Detector
sweep
decay volume HS decay spectrometer
120 m
SHiP
SHiP
charm beauty
Hidden particle model
independent
particle ID
Heavy
Neutral Lepton (HNL) dark photon dark
scalar axion-like particles
4 HNL
[3, 4]
116
2
1
CERN SPS
400 GeV
DsTau
SHiP
1 DONuT
(>50%) (9 ) (33%)
2
Ds (cs
cs) Ds → τντ
τ → ντX DONuT
Ds
Ds
DsTau
10%
SHiP 10,000
2%
400 GeVproton
�� production target(e.g. tungsten)
charged particle sweeping,neutron absorption
�� beam
�
�� ���
�� �
��proton
�� production���
�
�� detection
≃5mm
�� acceptance ~ 5%
≃5mm
�� detector
2:
2 10%
10–150 GeV
Super-K Hyper-K
1.2 Hidden Sector
LHC
SHiP
(Search for Hidden Particle) CERN SPS
Beam Dump Facility (BDF) charm
beauty hidden sector
particle Hid-
den Sector (HS) decay spectrometer
Light Dark Matter (LDM)
Scattering and Neutrino De-
tector(SND) 3
3: SHiP :
sweep Active Muon shield
Scattering and Neutrino Detector
sweep
decay volume HS decay spectrometer
120 m
SHiP
SHiP
charm beauty
Hidden particle model
independent
particle ID
Heavy
Neutral Lepton (HNL) dark photon dark
scalar axion-like particles
4 HNL
[3, 4]
3
4: SHiP Heavy Neutral Lepton
1.3 Charm Production Intrinsic Charm
Prompt Neutrino Study
1000
2
3
u
intrinsic charm [5, 6]
2
π K
π K
DsTau
2×108
2×108
10
intrinsic charm
charm
2 DsTau SHiP
DsTau/NA65 Spokesperson
Deputy Spokesperson Physics Coordinator
(5 9 )
CERN-SPS 400 GeV
DsTau
2016 2 CERN SPS/PS (SPSC)
letter of intent [7] 2016/2017
[8]
2017 8 SPSC 2018 1 SPSC
2018 2021
2018 8
1/10
SPSC
2019 6 CERN Research Board DsTau
NA65 2021/2022
SHiP 2015 4 SPSC Technical
Proposal[9] SHiP
review article [3]
2015 170 45 14
2019 250 57 18
SPSC
2016 SPSC 3 Com-
prehensive Design Study (CDS)
CERN Physics Beyond Collider forum
(PBC) R&D BDF
European Particle Physics Strategy Up-
date (EPPSU) PBC
Comprehensive Design Study EPPSU
SHiP [10] BDF[11]
2019 1 SHiP/BDF 2019 5
Open EPPSU Symposium
2019 12 Comprehensive Design Study (CDS)
report[12] SPSC 2020 Technical De-
sign Report (TDR) 2023
TDR
5 6
2028
117
4
3 DsTau/NA65
3.1
DsTau/NA65 400 GeV
400 GeV
10 20
Ds D−s → τ−ντ
τ− → Xντ
Ds Ds
DsTau/NA65 Ds
D−s → τ−ντ τ− → Xντ
1
2
Ds τ
mm
mm 2
D−s → τ−ντ Ds τ
7mrad mm mrad
5
Ds Ds
Ds → τ τ τ → X
4 Ds
4
20% [1]
12.5 cm×10 cm
x-y
x 6 4
10%
2×108 400
3.2 2018
2018 1/10
5: DsTau/NA65
6: DsTau/NA65
DONuT
2021
2018 55 m2
/
3 8 CERN
SPS-H2
3.5×108 400 GeV 30
4 11
( 7)
7: DsTau SPS-H2
118
4
3 DsTau/NA65
3.1
DsTau/NA65 400 GeV
400 GeV
10 20
Ds D−s → τ−ντ
τ− → Xντ
Ds Ds
DsTau/NA65 Ds
D−s → τ−ντ τ− → Xντ
1
2
Ds τ
mm
mm 2
D−s → τ−ντ Ds τ
7mrad mm mrad
5
Ds Ds
Ds → τ τ τ → X
4 Ds
4
20% [1]
12.5 cm×10 cm
x-y
x 6 4
10%
2×108 400
3.2 2018
2018 1/10
5: DsTau/NA65
6: DsTau/NA65
DONuT
2021
2018 55 m2
/
3 8 CERN
SPS-H2
3.5×108 400 GeV 30
4 11
( 7)
7: DsTau SPS-H2
5
8:
HTS
HTS 1 2.5 mrad
τ
2018 30
2019 90%
1
13
8
1 2
tanθ <0.1 2
95%
5×105 /cm2 HTS
1
CHORUS
DONuT OPERA
/
/
/
[13]
400 GeV
76151 /
86
9
/
Ds
mrad Ds
500 μm
400 GeV proton
primary vertex
neutral decay
kink
9: 1-prong (kink, /
) 2-prong (
) [1]
3.3
2021-2022 2×108
2
Ds
1000
Ds
[1] 400 GeV
Ds
SHiP
Ds
d2σ/dxF /dp2T ∝ (1− | xF |)n · e−b·p2
T
n b
n
Ds n
10 Ds
n
Ds
1000
119
6
50% 10%
10: Ds
n δn
[1] y
n = 5.8
4 SHiP ντ
SHiP (BDF)
appearance
OPERA [14] DONuT
OPERA
Scattering and Neutrino Detector (SND)
Lepton Universality
Light Dark Matter (LDM)
4.1 BDF+
BDF 11 CERN North Area
North Area
BDF SPS 400 GeV 1 slow extrac-
tion 7.2 SPS
355 kW 1
extraction time 2.65 MW
11: BDF : CERN North Area
(TZM)
BDF
12
BDF
12: BDF target complex
SHiP 12
3
SND SND OPERA
Emulsion Cloud Chamber (ECC) ECC
OPERA
ECC
ECC
40 cm×40 cm 35 35
10X0
ECC 3 15 mm
Compact Emulsion Spectrometer
(CES)
muon filter Target Tracker (TT)
wall wall 2×2 ECC
CES SND 19 wall
120
6
50% 10%
10: Ds
n δn
[1] y
n = 5.8
4 SHiP ντ
SHiP (BDF)
appearance
OPERA [14] DONuT
OPERA
Scattering and Neutrino Detector (SND)
Lepton Universality
Light Dark Matter (LDM)
4.1 BDF+
BDF 11 CERN North Area
North Area
BDF SPS 400 GeV 1 slow extrac-
tion 7.2 SPS
355 kW 1
extraction time 2.65 MW
11: BDF : CERN North Area
(TZM)
BDF
12
BDF
12: BDF target complex
SHiP 12
3
SND SND OPERA
Emulsion Cloud Chamber (ECC) ECC
OPERA
ECC
ECC
40 cm×40 cm 35 35
10X0
ECC 3 15 mm
Compact Emulsion Spectrometer
(CES)
muon filter Target Tracker (TT)
wall wall 2×2 ECC
CES SND 19 wall
7
8
CES
13: SND
interacted νμ νe ντ
13
30 mm
10 GeV
SND 14 1.2 T
CES
3
4.2
SHiP BDF 5 2×1020 PoT
OPERA CERN Neu-
trino beam to GranSasso (CNGS) 1.8×1020 PoT
1
6000 5000
2 CES hadronic decay
14: SND: SND 1.2T
1: DIS
�E� [GeV] CC DIS
Nνe 59 1.1 × 106
Nνμ 42 2.7 × 106
Nντ 52 3.2 × 104
Nνe46 2.6 × 105
Nνμ36 6.0 × 105
Nντ70 2.1 × 104
SHiP ECC
τ → e
CES
2:
Decay Mode ντ ντ
τ → μ 1200 1000
τ → h 4000 3000
τ → 3h 1000 700
Total 6200 4700
5000
DONuT 9
OPERA 10
3
121
8
DsTau/NA65 SHiP
B
anomaly B → Dτντ
b,d
Belle BaBar
LHCb
OPERA
(ντN → τD0N �)[15] 1
0.1
SHiP ντ
R(D) RR(c) = ντN→τcXντN→τX /νN→lcX
νN→lX
double ratio
3 GENIE [16]
3: DIS
�E� CC DIS Charm frac.
[GeV] with charm [%]
Nνe66 6.0 × 104 5.7
Nνμ55 1.3 × 105 4.7
Nνe57 1.3 × 104 5.1
Nνμ49 2.5 × 104 4.2
Total 2.3 × 105
6000 5000
300 charm B
anomaly 15%
DONuT OPERA
5
CERN SPS DsTau/NA65 SHiP
hidden sector
intrinsic charm study
DsTau/NA65 2021-2022
SHiP 2020
6
DsTau Collaboration (
) SHiP Collaboration
SPS SPS Coordinator
17H02887 18KK0085
[1] S. Aoki et al. [DsTau Collaboration], DsTau:
study of tau neutrino production with 400 GeV
protons from the CERN-SPS. J. High Energ.
Phys. 2020, 33 (2020).
[2] Y.S. Amhis et al. [HFLAV Collaboration], Aver-
ages of b-hadron c-hadron, and τ -lepton prop-
erties as of 2018. [arXiv:1909.12524].
[3] S. Alekhin et al., A facility to Search for Hidden
Particles at the CERN SPS: the SHiP physics
case, Rept. Prog. Phys. 79 (2016), no. 12 124201.
[arXiv:1504.04855].
[4] J. Beacham et al., Physics Beyond Colliders at
CERN: Beyond the Standard Model Working
Group Report 2019. [arXiv:1901.09966].
[5] A.V. Giannini, V.P. Goncalves, and F.S.
Navarra, Intrinsic charm contribution to the
prompt atmospheric neutrino flux, Physical Re-
view D 98 (2018) 014012.
[6] Weidong Bai, Mary Hall Reno, Prompt neutri-
nos and intrinsic charm at SHiP, J. High Energ.
Phys. (2019) 77.
122
8
DsTau/NA65 SHiP
B
anomaly B → Dτντ
b,d
Belle BaBar
LHCb
OPERA
(ντN → τD0N �)[15] 1
0.1
SHiP ντ
R(D) RR(c) = ντN→τcXντN→τX /νN→lcX
νN→lX
double ratio
3 GENIE [16]
3: DIS
�E� CC DIS Charm frac.
[GeV] with charm [%]
Nνe66 6.0 × 104 5.7
Nνμ55 1.3 × 105 4.7
Nνe57 1.3 × 104 5.1
Nνμ49 2.5 × 104 4.2
Total 2.3 × 105
6000 5000
300 charm B
anomaly 15%
DONuT OPERA
5
CERN SPS DsTau/NA65 SHiP
hidden sector
intrinsic charm study
DsTau/NA65 2021-2022
SHiP 2020
6
DsTau Collaboration (
) SHiP Collaboration
SPS SPS Coordinator
17H02887 18KK0085
[1] S. Aoki et al. [DsTau Collaboration], DsTau:
study of tau neutrino production with 400 GeV
protons from the CERN-SPS. J. High Energ.
Phys. 2020, 33 (2020).
[2] Y.S. Amhis et al. [HFLAV Collaboration], Aver-
ages of b-hadron c-hadron, and τ -lepton prop-
erties as of 2018. [arXiv:1909.12524].
[3] S. Alekhin et al., A facility to Search for Hidden
Particles at the CERN SPS: the SHiP physics
case, Rept. Prog. Phys. 79 (2016), no. 12 124201.
[arXiv:1504.04855].
[4] J. Beacham et al., Physics Beyond Colliders at
CERN: Beyond the Standard Model Working
Group Report 2019. [arXiv:1901.09966].
[5] A.V. Giannini, V.P. Goncalves, and F.S.
Navarra, Intrinsic charm contribution to the
prompt atmospheric neutrino flux, Physical Re-
view D 98 (2018) 014012.
[6] Weidong Bai, Mary Hall Reno, Prompt neutri-
nos and intrinsic charm at SHiP, J. High Energ.
Phys. (2019) 77.
9
[7] S. Aoki, A. Ariga, T. Ariga, K. Kodama, M.
Nakamura, O. Sato, Study of tau-neutrino pro-
duction by measuring Ds → τ events in 400 GeV
proton interactions: Test of lepton universality in
neutrino charged-current interactions, Letter of
Intent to SPSC CERN-SPSC-2016-013 ; SPSC-
I-245.
[8] S. Aoki et al. [DsTau Collaboration], Study
of tau-neutrino production at the CERN-SPS
Experiment Proposal, CERN-SPSC-2017-029 ;
SPSC-P-354.
[9] M. Anelli et al. [SHiP Collaboration], A fa-
cility to Search for Hidden Particles (SHiP)
at the CERN SPS - Technical Proposal, 2015.
[arXiv:1504.04956].
[10] C. Ahdida et al. [SHiP Collaboration], The SHiP
experiment at the SPS Beam Dump Facility -
Comprehensive overview, submitted to EPPSU
2018.
[11] C. Ahdida et al., SPS Beam Dump Facility -
Comprehensive overview, submitted to EPPSU
2018.
[12] C. Ahdida et al. [SHiP Collaboration], SHiP Ex-
periment - Comprehensive Design Study report,
CERN-SPSC-2019-049 ; SPSC-SR-263.
[13] S. Aoki et al. [DsTau Collaboration], DsTau Sta-
tus Report, CERN-SPSC-2019-013 ; SPSC-SR-
250.
[14] N. Agafonova et al. [OPERA Collaboration], Fi-
nal Results of the OPERA Experiment on ντ Ap-
pearance in the CNGS Neutrino Beam, Phys.
Rev. Lett. 120 (2018) no.21,211801. Erratum:
Phys. Rev. Lett. 121 (2018) no.13 139901.
[15] N. Agafonova et al. [OPERA Collaboration],
First observation of a tau neutrino charged cur-
rent interaction with charm production in the
Opera experiment. [arXiv:1912.11012].
[16] C. Andreopoulos et al., The GENIE Neutrino
Monte Carlo Generator, Nucl. Instrum. Meth. A
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123
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