) S a n g - H o K i m ( A s i a P a c i fj c C - PowerPoint PPT Presentation

J-PARC hadron physics in 2016, 02-04, March, Tokai, Japan Reanalysis of the reaction p (1020)p Reanalysis of the reaction p (1020)p γ → φ γ → φ with the recent CLAS data with the recent CLAS data 金相鎬 ) S a n g - H o K i m ( A s i a P a c i fj c C e n t e r f o r T h e o r e t i c a l P h y s i c s ( A P C T P ) , P O S T E C H In collaboration with ⚬ Yongseok Oh (KNU, APCTP)

O I n v e s t i g a t i o n E x t e n s i o n ( P r e d i c t i o n ) P R O D U C T I O N o f H A D R O N S o f s t r a n g e s e c t o r t o c h a r m s e c t o r u t l i n e 2 2

O I n v e s t i g a t i o n E x t e n s i o n ( P r e d i c t i o n ) P R O D U C T I O N o f H A D R O N S o f s t r a n g e s e c t o r t o c h a r m s e c t o r u t l i n e s c 3 2

O I n v e s t i g a t i o n E x t e n s i o n ( P r e d i c t i o n ) P R O D U C T I O N o f H A D R O N S o f s t r a n g e s e c t o r t o c h a r m s e c t o r u (O) PRD92.094021(2015) t with J-PARC collaborators l i (O) Drafting n e s c (O) Only strange sector (N* physics) (Δ) Preliminary (strange sector) with LEPS collaborators P ( 4 3 8 0 ) , P ( 4 4 5 0 ) ? c c PRD93.034009(2016), IHEP 4 PRD92.034022(2015), Julich 2

O I n v e s t i g a t i o n E x t e n s i o n ( P r e d i c t i o n ) P R O D U C T I O N o f H A D R O N S o f s t r a n g e s e c t o r t o c h a r m s e c t o r u (O) PRD92.094021(2015) t with J-PARC collaborators l i (O) Drafting n e s c (O) Only strange sector (N* physics) (Δ) Preliminary (strange sector) with LEPS collaborators P ( 4 3 8 0 ) , P ( 4 4 5 0 ) ? c c PRD93.034009(2016), IHEP 5 PRD92.034022(2015), Julich 2

Contents ◈ Background ◈ Previous analyses ◈ Problems of current theoretical works ◈ Results : 𐤠 total cross sections (σ) 𐤠 difgerential cross sections (dσ/dΩ, dσ/dt) ◈ Summary 6 3

Soft hadronic processes Sangho Kim (APCTP) R e g g e o n ( Me s o n e x c h a n g e ) D e s c r i b e s a n e x c h a n g e o f a f a m i l y o f • o r d i n a r y m e s o n s . G o v e r n s r e l a t i v e l y l o w e n e r g y r e g i o n s . • • ( ρ , ω ) t r a j e c t o r i e s ( C = - 1 , n a t u r a l p a r i t y ) & ( ƒ ₂ , a ₂ ) t r a j e c t o r i e s ( C = + 1 , n a t u r a l p a r i t y ) a r e a l l d e g e n e r a t e . 7 Donnachie, Pomeron Physics and QCD (2002) 4

Soft hadronic processes Sangho Kim (APCTP) P o m e r o n a s s o c i a t e d w i t h t h e m e s o n t r a j . s . • I s n o t t h e q . n . s o f t h e v a c u u m , • H a s I = 0 a n d C = + 1 . • G o v e r n s r e l a t i v e l y h i g h e n e r g y r e g i o n s . • T h e r e i s n o d e e p t h e o r y r e a s o n f o r t h e P o m e r o n h y p o t h e s i s , b u t t h e p h e n o m e n o l o g y b a s e d o n w h i c h t u r n s o u t t o b e v e r y s u c c e s s f u l . • A s s u m i n g t h e t r a j e c t o r y : 8 Donnachie, Pomeron Physics and QCD (2002) 5

Elastic photoproduction of vector mesons Sangho Kim (APCTP) L o w e n e r g y • T h e d y n a m i c s o f R e g g e o n i s r e l a t e d t o n o n - p e r t u r a b t i v e Q C D i n q - q s e c t o r . • U n n a t u r a l p a r i t y ( - 1 ) . • O Z I s u p p r e s s e d . H i g h e n e r g y • P o m e r o n i s t h e r e s u l t o f n o n - p e r t u r b a t i v e Q C D i n t e r a c t i o n i n g l u o n s e c t o r . • N a t u r a l p a r i t y ( + 1 ) . - - - - Pomeron —— total • • • • Pomeron + ƒ ₂ 9 Laget, PLB.489.313(2000) 6

Elastic photoproduction of vector mesons Sangho Kim (APCTP) • G e n e r a l v e c t o r m e s o n e x c h a n g e s ( ρ , ω ) P C - - [ J ( 1 ) ] a r e n o t a l l o w e d d u e t o t h e i r n e g a t i v e c h a r g e c o n j u g a t i o n s ( C = - 1 ) . P C - + • V e c t o r m e s o n s w i t h e x o t i c q . n . [ J ( 1 ) ] a r e p o s s i b l e b u t t h e y , p o s s i b l y h y b r i d e x o t i c m e s o n s , a r e n o t m u c h k n o w n e x p e r i m e n t a l l y . • s - a n d u - c h a n n e l e x c h a n g e s - - - - Pomeron —— total • • • • Pomeron + ƒ ₂ 10 Laget, PLB.489.313(2000) 7

φ photoproduction in low energy regions Sangho Kim (APCTP) • Me s o n p h o t o p r o d u c t i o n h a s b e e n a v e r y u s e f u l e x p e r i m e n t a l t o o l t o i n v e s t i g a t e Q C D a s a h a d r o n i c d e g r e e s o f f r e e d o m . • A b u n d a n t e x p . a l d a t a a r e r e p o r t e d r e c e n t l y a t C L A S i n l o w e n e r g y r e g i o n s ( E = 1 . 6 ~ 3 . 6 G e V ) . γ [ S e r a y d a r y a n , P R C . 8 9 . 0 5 5 2 0 6 ( 2 0 1 4 ) ] & [ D e y , P R C . 8 9 . 0 5 5 2 0 8 ( 2 0 1 4 ) ] . • P o m e r o n a l o n e i s n o t s u ffj c i e n t t o d e s c r i b e l o w e n e r g y r e g i o n s . • O u r g o a l i s t o r e a n a l y z e t h e m t h e o r e t i c a l l y . 11 8

Previous theoretical works for the γp → φ(1020)p Sangho Kim (APCTP) • 1 9 9 8 N a g a n o , T o k i , P r o c e e d i n g s ( ) π + 2 2 : s c a l a r g l u e b a l l ( J = 0 , M ≃ 3 G e V ) . g l • Wi l l i a m s , P R C , 5 7 , 2 2 3 ( 1 9 9 8 ) : s s k n o c k o u t , n o n z e r o φ N N c o u p l i n g s . • T i t o v e t a l . , P R C , 6 0 , 0 3 5 2 0 5 ( 1 9 9 9 ) : s c a l a r m e s o n s ( σ , a , ƒ ) . 0 0 • 2 0 0 0 L a g e t , P L B , 4 8 9 , 3 1 3 ( ) : ƒ ( 1 2 7 0 ) m e s o n , t w o g l u o n e x c h a n g e . 2 • T i t o v , L e e , P R C , 6 7 , 0 6 5 2 0 5 ( 2 0 0 3 ) * . : ƒ ( 1 2 7 0 ) , ƒ ' ( 1 5 2 5 ) m e s o n s , N 2 2 0 ∴ P o m e r o n & p s e u d o s c a l a r m e s o n s ( π , η ) i n c o m m o n . 12 t - c h a n n e l c o n t r i b u t i o n s a r e w i d e l y s t u d i e d . 9

Previous theoretical works for the γp → φ(1020)p Sangho Kim (APCTP) • 1 9 9 8 N a g a n o , T o k i , P r o c e e d i n g s ( ) π + 2 2 : s c a l a r g l u e b a l l ( J = 0 , M ≃ 3 G e V ) . g l • Wi l l i a m s , P R C , 5 7 , 2 2 3 ( 1 9 9 8 ) : s s k n o c k o u t , n o n z e r o φ N N c o u p l i n g s . • T i t o v e t a l . , P R C , 6 0 , 0 3 5 2 0 5 ( 1 9 9 9 ) : s c a l a r m e s o n s ( σ , a , ƒ ) . 0 0 • 2 0 0 0 L a g e t , P L B , 4 8 9 , 3 1 3 ( ) : ƒ ( 1 2 7 0 ) m e s o n , t w o g l u o n e x c h a n g e . 2 Mibe(LEPS)PRL.95.182001( 2005 ) • T i t o v , L e e , P R C , 6 7 , 0 6 5 2 0 5 ( 2 0 0 3 ) * . : ƒ ( 1 2 7 0 ) , ƒ ' ( 1 5 2 5 ) m e s o n s , N 2 2 0 ∴ P o m e r o n & p s e u d o s c a l a r m e s o n s ( π , η ) i n c o m m o n . 13 t - c h a n n e l c o n t r i b u t i o n s a r e w i d e l y s t u d i e d . 9