Upload
others
View
7
Download
0
Embed Size (px)
Citation preview
From GlueX/CLAS12 to the EICJustin Stevens
Justin Stevens,Snowmass Spectroscopy
exoticspositive paritynegative parity
2
Dudek et al. PRD 88 (2013) 094505
Lightest hybrid mesons
JPC
Mes
on M
ass
(MeV
)Lattice QCD
g
Justin Stevens,Snowmass Spectroscopy
exoticspositive paritynegative parity
3
Dudek et al. PRD 88 (2013) 094505
JPC
Mes
on M
ass
(MeV
)Lattice QCD
g
exotics
JPC
ssuu+ ddisovector
Most experimental searches for hybrids
limited to the π1 state
Lightest hybrid mesons
Justin Stevens,Snowmass Spectroscopy
: coupled channel fit to ηπ and η’π determine pole positions for a2, a2’, and exotic π1
4
COMPASS: Phys. Lett. B 740, 303 (2015).JPAC: Phys. Rev. Lett. 122, 042002 (2019).
ηπ/η’π spectroscopy at with
COMPASS: PLB 740 (2015) 303 JPAC: PRL 122 (2019) 042002
a2(1320)<latexit sha1_base64="SoYY4kTm6eaDQ3FAFW7LNAm6qgY=">AAAB8HicdVDLSgMxFM3UV62vqks3wSLUzZCZDm3dFd24rGAf0g4lk2ba0ExmSDJCKf0KNy4UcevnuPNvzLQVVPTAhcM593LvPUHCmdIIfVi5tfWNza38dmFnd2//oHh41FZxKgltkZjHshtgRTkTtKWZ5rSbSIqjgNNOMLnK/M49lYrF4lZPE+pHeCRYyAjWRrrDA7fsVFx0PiiWkH1Rr7peFSIboZrjOhlxa17Fg45RMpTACs1B8b0/jEkaUaEJx0r1HJRof4alZoTTeaGfKppgMsEj2jNU4Igqf7Y4eA7PjDKEYSxNCQ0X6veJGY6UmkaB6YywHqvfXib+5fVSHdb9GRNJqqkgy0VhyqGOYfY9HDJJieZTQzCRzNwKyRhLTLTJqGBC+PoU/k/aru1UbPfGKzUuV3HkwQk4BWXggBpogGvQBC1AQAQewBN4tqT1aL1Yr8vWnLWaOQY/YL19Ath0jyM=</latexit>
a02(1700)<latexit sha1_base64="gxTogHt/dseoNI2p25627GiI2JI=">AAAB8XicdVDLSgMxFM34rPVVdekmWMS6GTLT0tZd0Y3LCvaB7VAyaaYNzWSGJCOUoX/hxoUibv0bd/6NmbaCih64cDjnXu69x485UxqhD2tldW19YzO3ld/e2d3bLxwctlWUSEJbJOKR7PpYUc4EbWmmOe3GkuLQ57TjT64yv3NPpWKRuNXTmHohHgkWMIK1ke7w2cAtOTWEzgeFIrIv6lW3UoXIRqjmuE5G3FqlXIGOUTIUwRLNQeG9P4xIElKhCcdK9RwUay/FUjPC6SzfTxSNMZngEe0ZKnBIlZfOL57BU6MMYRBJU0LDufp9IsWhUtPQN50h1mP128vEv7xeooO6lzIRJ5oKslgUJBzqCGbvwyGTlGg+NQQTycytkIyxxESbkPImhK9P4f+k7dpO2XZvKsXG5TKOHDgGJ6AEHFADDXANmqAFCBDgATyBZ0tZj9aL9bpoXbGWM0fgB6y3Tz08j1Y=</latexit>
⇡1(1600)<latexit sha1_base64="929AX7U2I8A5/hggCfGpuh1d+HQ=">AAAB8nicdVDLSsNAFJ34rPVVdelmsAh1EyZpaOuu6MZlBfuANJTJdNoOnUzCzEQooZ/hxoUibv0ad/6Nk7aCih64cDjnXu69J0w4UxqhD2ttfWNza7uwU9zd2z84LB0dd1ScSkLbJOax7IVYUc4EbWumOe0lkuIo5LQbTq9zv3tPpWKxuNOzhAYRHgs2YgRrI/n9hA2cilND6GJQKiP7slFzvRpENkJ1x3Vy4ta9qgcdo+QogxVag9J7fxiTNKJCE46V8h2U6CDDUjPC6bzYTxVNMJniMfUNFTiiKsgWJ8/huVGGcBRLU0LDhfp9IsORUrMoNJ0R1hP128vFvzw/1aNGkDGRpJoKslw0SjnUMcz/h0MmKdF8ZggmkplbIZlgiYk2KRVNCF+fwv9Jx7Wdqu3eeuXm1SqOAjgFZ6ACHFAHTXADWqANCIjBA3gCz5a2Hq0X63XZumatZk7AD1hvn2uTkAs=</latexit>
1�+
<latexit sha1_base64="TRug5Wj5B5Ix8tFPk8PDPmmXZ8A=">AAAB7XicbVBNSwMxEJ2tX7V+VT16CRZBEMuuLOix6MVjBfsB7VqyabaNzSZLkhXK0v/gxYMiXv0/3vw3pu0etPXBwOO9GWbmhQln2rjut1NYWV1b3yhulra2d3b3yvsHTS1TRWiDSC5VO8SaciZowzDDaTtRFMchp61wdDP1W09UaSbFvRknNIjxQLCIEWys1PQesvOzSa9ccavuDGiZeDmpQI56r/zV7UuSxlQYwrHWHc9NTJBhZRjhdFLqppommIzwgHYsFTimOshm107QiVX6KJLKljBopv6eyHCs9TgObWeMzVAvelPxP6+TmugqyJhIUkMFmS+KUo6MRNPXUZ8pSgwfW4KJYvZWRIZYYWJsQCUbgrf48jJpXlQ9v+rf+ZXadR5HEY7gGE7Bg0uowS3UoQEEHuEZXuHNkc6L8+58zFsLTj5zCH/gfP4AxbOOnA==</latexit>
2++
<latexit sha1_base64="4JfUYxROA/xBhYQerel7MHtH3hU=">AAAB7XicbVBNSwMxEJ2tX7V+VT16CRZBKJTdUqjHohePFewHtGvJptk2NpssSVYoS/+DFw+KePX/ePPfmLZ70NYHA4/3ZpiZF8ScaeO6305uY3Nreye/W9jbPzg8Kh6ftLVMFKEtIrlU3QBrypmgLcMMp91YURwFnHaCyc3c7zxRpZkU92YaUz/CI8FCRrCxUrv6kJbLs0Gx5FbcBdA68TJSggzNQfGrP5QkiagwhGOte54bGz/FyjDC6azQTzSNMZngEe1ZKnBEtZ8urp2hC6sMUSiVLWHQQv09keJI62kU2M4Im7Fe9ebif14vMeGVnzIRJ4YKslwUJhwZieavoyFTlBg+tQQTxeytiIyxwsTYgAo2BG/15XXSrla8WqV2Vys1rrM48nAG53AJHtShAbfQhBYQeIRneIU3RzovzrvzsWzNOdnMKfyB8/kDxDCOmw==</latexit>
Justin Stevens,Snowmass Spectroscopy 5
Jefferson Lab 12 GeV e- beamRunning since 2017: programs in spectroscopy, nucleon structure, etc.
Photoproduction process provides access to many proposed exotic decay channels
Orders of magnitude higher statistics than previous photoproduction experiments
Kaon identification to investigate light vs strange quark content
Justin Stevens,Snowmass Spectroscopy
ηπ/η’π spectroscopy at
6
�p ! ⌘⇡��++<latexit sha1_base64="Wxd9i0C8RqBQNshChw+cf9g0bl4=">AAACE3icbVA9SwNBEN3z2/gVtbRZDIIohjsVtBS1sFQwKuRimNtMkiW7d8funBKO/Acb/4qNhSK2Nnb+GzcxhV8PBh7vzTAzL0qVtOT7H97I6Nj4xOTUdGFmdm5+obi4dGGTzAisiEQl5ioCi0rGWCFJCq9Sg6AjhZdR56jvX96gsTKJz6mbYk1DK5ZNKYCcVC9uhC3QGnjKQyNbbQJjklseIkGYyustHh6jIrjONzd79WLJL/sD8L8kGJISG+K0XnwPG4nINMYkFFhbDfyUajkYkkJhrxBmFlMQHWhh1dEYNNpaPvipx9ec0uDNxLiKiQ/U7xM5aGu7OnKdGqhtf3t98T+vmlFzv5bLOM0IY/G1qJkpTgnvB8Qb0qAg1XUEhJHuVi7aYECQi7HgQgh+v/yXXGyXg53y9tlu6eBwGMcUW2GrbJ0FbI8dsBN2yipMsDv2wJ7Ys3fvPXov3utX64g3nFlmP+C9fQLx5p2P</latexit>
a0 a2
Investigating similar channel as exotic P-wave signals reported by COMPASS
Polarized photon beam provides new information on production mechanism, collaborating with JPAC on amplitudes
Justin Stevens,Snowmass Spectroscopy
Pentaquarks and threshold charmonium
7
Threshold J/ψ production
�p ! pe+e�
PRL 123, 072001 (2019)
Justin Stevens,Snowmass Spectroscopy 8
Threshold J/ψ production
PRL 122, 222001 (2019)
Pentaquarks and threshold charmonium
Justin Stevens,Snowmass Spectroscopy 9
8 9 10 20, GeV γE
1−10
1
10
p), n
bψ
J/
→p γ(
σ
GlueXSLACCornell
BR=2.9%-(4312) 3/2+cJPAC P
BR=1.6%-(4440) 3/2+cJPAC P
BR=2.7%-(4457) 3/2+cJPAC P
Limits BR(Pc→J/ψp) < 2-4%, providing additional model constraints
Threshold J/ψ production
PRL 123, 072001 (2019)
PRL 122, 222001 (2019)
Pentaquarks and threshold charmonium
Justin Stevens,Snowmass Spectroscopy
Multiple complementary measurements at JLab will continue to improve limits
10
PRL 122, 222001 (2019)
8 8.5 9 9.5 10 10.5 11 11.5 12, GeV γE
1−10
1
p), n
bψ
J/→
p γ(σ
GlueX publishedBrodsky et al. fit to GlueX dataGlueX anticipated stat. errors
GlueX Phase I: Existing Data
Pentaquarks and threshold charmonium
Justin Stevens,Snowmass Spectroscopy
Electron Ion Collider (EIC)
11
Versatile high-luminosity, polarized e+p and e+A collider, recently received DOE CD0
Construction could begin in a few years with first data in ~2030(?)
Very active development of detector conceptual designs (EIC Yellow Report)
ps = 20� 141 GeV
<latexit sha1_base64="HKVtRPQ+wikKpG/NCDh4fRM/InI=">AAACCXicbVA9SwNBEN3zM8avqKXNYhBsDHchoI0QtNAygvmA5Ah7m0myZO/D3TkxHLG08a/YWChi6z+w89+4Sa7QxAcDj/dmmJnnRVJotO1va2FxaXllNbOWXd/Y3NrO7ezWdBgrDlUeylA1PKZBigCqKFBCI1LAfE9C3RtcjP36HSgtwuAGhxG4PusFois4QyO1c7SlbxUmekTPaNGmx9QpOQ8thHtUfnIJtVE7l7cL9gR0njgpyZMUlXbuq9UJeexDgFwyrZuOHaGbMIWCSxhlW7GGiPEB60HT0ID5oN1k8smIHhqlQ7uhMhUgnai/JxLmaz30PdPpM+zrWW8s/uc1Y+yeuokIohgh4NNF3VhSDOk4FtoRCjjKoSGMK2FupbzPFONowsuaEJzZl+dJrVhwSoXSdSlfPk/jyJB9ckCOiENOSJlckQqpEk4eyTN5JW/Wk/VivVsf09YFK53ZI39gff4AWdmY3Q==</latexit>
L = 1034 cm�2s�1
<latexit sha1_base64="aXmdYkN92eLK/Bf2buUpJVFMo6E=">AAACHnicbVDLSgMxFM34rPVVdekmWAQ3lpla0Y1QdOPCRQX7gL7IpGkbmswMyR2xDOOPuPFX3LhQRHClf2OmraCtBwLnnnMvN/e4geAabPvLmptfWFxaTq2kV9fWNzYzW9sV7YeKsjL1ha9qLtFMcI+VgYNgtUAxIl3Bqu7gIvGrt0xp7ns3MAxYU5Kex7ucEjBSO3PckAT6lIjoKsZn2LFb0VEhvm8AuwMlIyrjVnSYj39qnZRO3M5k7Zw9Ap4lzoRk0QSlduaj0fFpKJkHVBCt644dQDMiCjgVLE43Qs0CQgekx+qGekQy3YxG58V43ygd3PWVeR7gkfp7IiJS66F0TWdyjJ72EvE/rx5C97QZcS8IgXl0vKgbCgw+TrLCHa4YBTE0hFDFzV8x7RNFKJhE0yYEZ/rkWVLJ55xCrnBdyBbPJ3Gk0C7aQwfIQSeoiC5RCZURRQ/oCb2gV+vRerberPdx65w1mdlBf2B9fgPQK6Lz</latexit>
Justin Stevens,Snowmass Spectroscopy
Exotic Photoproduction @ EIC
Higher energy provides opportunities in XYZ, Pc, etc.
EIC Yellow Report: developing detector requirements for spectroscopy (PID, recoil nucleons, etc.)
Polarized electron and ion beams
12
PRD 88 (2013) 114009
Z+c (3900) Vector meson
exchange couple to and X(3872)→J/ψρ
u-channel exchange of Pc results into “backward” J/ψ
Model development by JPAC: Szczepaniak, Pilloni, Hiller Blin,
Winney, Albaladejo, Mathieu
BESIIIPRL 110, 252001 (2013)
Justin Stevens,Snowmass Spectroscopy
Exotic Photoproduction @ EIC
Higher energy provides opportunities in XYZ, Pc, etc.
EIC Yellow Report: developing detector requirements for spectroscopy (PID, recoil nucleons, etc.)
Polarized electron and ion beams
13
Many groups participating: JPAC, JLab, Florida State, Indiana, W&M, Glasgow, INFN, Regina. More welcome!
EIC Yellow Report: detector requirements for spectroscopy (PID, recoil nucleon tagging, etc.)
3.6 3.8 4 4.2 4.4 (GeV)πψJ/ M
0
1000
2000
3000
4000
5000
6000
7000
80005 x 41
HandbookπNo e/
3.6 3.8 4 4.2 4.4 (GeV)πψJ/ M
0
200
400
600
800
1000
1200
1400
5 x 41Handbook
π e/σ1
3.6 3.8 4 4.2 4.4 (GeV)πψJ/ M
0
20
40
60
80
100
120
140
160
180
5 x 41Handbook
π e/σ2
3.6 3.8 4 4.2 4.4 (GeV)πψJ/ M
0
20
40
60
80
100
5 x 41Handbook
π e/σ3
Pythia Zc→J/ψπ+
Justin Stevens,Snowmass Spectroscopy
Summary and OutlookFixed target spectroscopy focused on light quark hybrids and threshold J/ψ production (s-channel Pc)
Jefferson Lab has a decade-long spectroscopy program with GlueX and CLAS12
EIC Spectroscopy program focused on alternative production mechanisms for heavy quark exotics
14
8 9 10 20, GeV γE
1−10
1
10
p), n
bψ
J/
→p γ(
σ
GlueXSLACCornell
BR=2.9%-(4312) 3/2+cJPAC P
BR=1.6%-(4440) 3/2+cJPAC P
BR=2.7%-(4457) 3/2+cJPAC P
PRL 123, 072001 (2019)