S e a r c h f o r d a r k f o r c e s w i t h - PowerPoint PPT Presentation

S e a r c h f o r d a r k f o r c e s w i t h K L OE ME S ON 2 0 1 6 J u n e 2 n d 2 0 1 6 A l e k s a n d e r Ga j o s J a g i e l l o n i a n U n i v e r s i t y , K r a k ó w , P o l a n d o n b e h a l f o f t h e K L OE a n d K L OE - 2 C o l l a b o r a t i o n s

Mo t i v a t i o n f o r d a r k f o r c e s ' s e a r c h e s A s t r o n o my : P h y s . R e v . L e t t 1 1 0 ( 2 0 1 3 ) 1 4 1 1 0 2  p o s i t r o n e x c e s s i n t h e c o s mi c r a y fm u x  n o s i mi l a r e fg e c t f o r a n t i p r o t o n s  5 1 1 k e V g a mma r a y s i g n a l f r o m t h e g a l a c t i c c e n t e r s e e n b y t h e I N T E GR A L A s t r o n . A s t r o p h y s . 4 0 7 ( 2 0 0 3 ) L 5 5 s a t e l l i t e  t h e a n n u a l mo d u l a t i o n me a s u r e d b y D A MA / L I B R A P a r t i c l e p h y s i c s : E u r . P h y s . J . C ( 2 0 1 0 ) 6 7 , 3 9 - 4 9  mu o n ma g n e t i c mo me n t a n o ma l y P r o p o s e d e x p l a n a t i o n :  We a k l y I n t e r a c t i n g Ma s s i v e P a r t i c l e s c h a r g e d u n d e r n e w t y p e o f i n t e a c t i o n  n e w g a u g e i n t e r a c t i o n me d i a t e d b y a n e w b o s o n : t h e U b o s o n ( a l s o k n o w n a s d a r k p h o t o n ) 2 . 0 6 . 2 0 1 6 S e a r c h f o r d a r k f o r c e s a t K L OE - - ME S ON 2 0 1 6 2

T h e U b o s o n ( d a r k p h o t o n ) a n d i t s s e a r c h e s  g a u g e b o s o n o f t h e d a r k f o r c e s U b o s o n s e a r c h e s a t K L O E :  l i g h t v e c t o r b o s o n  D a l i t z d e c a y s o f Φ :  c o u l d b e p r o d u c e d i n WI MP  + – → + – e e Φ → η U , U → e e a n n i h i l a t i o n s  η + – 0 → π π π  c o u p l e s t o a n o r d i n a r y p h o t o n  η → π 0 π 0 π 0 t h r o u g h s ma l l k i n e t i c mi x i n g  C o n t i n u u m p r o c e s s e s :  e + e – → U γ  U → μ + μ –  U → e + e – α ' α E  U 2 ε = / – k i n e t i c mi x i n g p a r a me t e r → π + π – M  H ε 2 ~ 1 0 - 8 – 1 0 - 3 i g g s s t r a h l u n g p r o c e s s : = > e fg e c t s o b s e r v a b l e i n O( Ge V )  e + e – → U h ' e n e r g y s c a l e c o l l i d e r s ! A n a l o g o u s l y t o t h e S M: S p o n t a n e o u s b r e a k i n g o f t h e U ( 1 ) s y mme t r y D = > i n t r o d u c t i o n o f d a r k H i g g s ( h ' ) 2 . 0 6 . 2 0 1 6 S e a r c h f o r d a r k f o r c e s a t K L OE - - ME S ON 2 0 1 6 3

T h e D A Φ N E - f a c t o r y Φ D o u b l e A n n u l a r Φ - f a c t o r y f o r N i c e E x p e r i me n t s :  e + e - c o l l i d e r  fj x e d e n e r g y  o fg - p e a k o p e r a t i o n p o s s i b l e  s + - e p a r a t e s t o r a g e r i n g s f o r e a n d e t o r e d u c e b e a m- b e a m i n t e r a c t i o n  2 i n t e r a c t i o n r e g i o n s D A Φ N E o p e r a t i o n s ( K L OE r u n ) :  p e a k l u mi n o s i t y o f 1 . 4 · 1 0 3 2 c m - 2 s - 1  b - 1 e s t d a i l y p e r f o ma n c e : 8 . 5 p b / d a y D a t a c o l l e c t e d b y K L OE :  a t Φ p e a k :  2 0 0 1 - 2 ~ 0 . 5 f b - 1 F o r mo r e d e t a i l s , s e e  2 0 0 4 - 5 : ~ 1 . 9 f b - 1 M. S i l a r s k i ’ s t a l k o n  2 Mo n d a y , h i g h n o o n 6 0 p b - 1 o fg - p e a k 2 . 0 6 . 2 0 1 6 S e a r c h f o r d a r k f o r c e s a t K L OE - - ME S ON 2 0 1 6 4

T h e K L OE D e t e c t o r F o r mo r e d e t a i l s , s e e L a r g e D r i f t C h a mb e r E l e c t r o ma n g n e t i c C a l o r i me t e r M. S i l a r s k i ’ s t a l k o n  l  g a s : 9 0 % H e + 1 0 % C H e a d a n d s c i n t i l l a t i n g fj b e r s Mo n d a y , h i g h n o o n 4 1 0  h e r me t i c c o v e r a g e ( 9 8 % 4 π )  R = 2 5 c m, i n n e r  b a r r e l w i t h R = 2 m o u t e r C - s h a p e d e n d c a p s  σ ≈ 1 5 0 μ m, σ ≈ 2 mm x y z  σ ( p ) / p = 0 . 4 % T T R = 2 m K L O E - 2 u p g r a d e  n e w d e t e c t o r s i n t h e i n t e r a c t i o n r e g i o n S u p e r c o n d u c t i n g c o i l  B = 0 . 5 2 T  w i l l c o l l e c t ~ 5 f b - 1 i n t h e n e x t 2 y e a r s 2 . 0 6 . 2 0 1 6 S e a r c h f o r d a r k f o r c e s a t K L OE - - ME S ON 2 0 1 6 5

+ – + – 0 0 0 0 Φ → η U , U → e e , η → π π π / π π π 0 0 0 + – Φ → η U , U → π π π e e + – 0 + – Φ → η U , U → π π π e e  2 c h a r g e d t r a c k s  4 t r a c k s , 2 p h o t o n c a n d i d a t e s  6 p r o mp t p h o t o n s c a n d i d a t e s ,  4 9 5 < M π < 6 0 0 Me V π γ γ E > 7 Me V n o t a s s o c i a t e d t o t r a c k  7 0 < M γ < 2 0 0 Me V  | T − R / c | < mi n ( 3 σ ( t ) , 2 n s ) γ γ γ  5 3 5 < M r < 5 6 0 Me V  a c c e p t a n c e : | c o s ( θ ) | < 0 . 9 2 e c o i l ( e e ) γ  T o F c u t s  4 0 0 < M 6 < 7 0 0 Me V γ  b a c k g r o u n d c o n t a mi n a t i o n 2 %  b a c k g r o u n d c o n t a mi n a t i o n 3 % ● Φ → η e + e – b c g e x t r a c t e d b y a fj t p a r a me t r i s e d b y t h e V MD mo d e l ● s i g n a l e x p e c t e d a s a p e a k a b o v e c o n t i n u u m b a c k g r o u n d i n M e e ● n o s i g n a l o b s e r v e d ● C L s t e c h n i q u e u s e d t o e s t i ma t e t h e u p p e r l i mi t P h y s . L e t t . B 7 0 6 ( 2 0 1 2 ) 2 5 1 P h y s . L e t t . B 7 2 0 ( 2 0 1 3 ) 1 1 1 2 . 0 6 . 2 0 1 6 S e a r c h f o r d a r k f o r c e s a t K L OE - - ME S ON 2 0 1 6 6

+ – + – 0 0 0 0 Φ → η U , U → e e , η → π π π / π π π ε 2 9 0 % C . L . u p p e r l i mi t o n o b t a i n e d a s s u mi n g t h e r e l a t i o n : [ R e e c e ‐ Wa n g , J H E P 0 9 0 7 : 0 5 1 ( 2 0 0 9 ) ] P h y s . L e t t . B 7 0 6 ( 2 0 1 2 ) 2 5 1 P h y s . L e t t . B 7 2 0 ( 2 0 1 3 ) 1 1 1 ε 2 < 1 . 7 × 1 0 - 5 @ 9 0 % C . L . f o r 3 0 < M U < 4 0 0 Me V ε 2 < 8 × 1 0 - 6 @ 9 0 % C . L . f o r 5 0 < M U < 2 1 0 Me V 2 . 0 6 . 2 0 1 6 S e a r c h f o r d a r k f o r c e s a t K L OE - - ME S ON 2 0 1 6 7

+ – + – e e → U γ w i t h U → μ μ ● d - 1 a t a s a mp l e l u mi n o s i t y 2 4 0 p b ● I S R e v e n t s f o r a c o n t i n u u m o f d i mu o n ma s s ● 2 t r a c k s ( 5 0 o < θ < 1 3 0 o ) μ ● U n d e t e c t e d γ ( θ < 1 5 o o r θ > 1 6 5 o ) γ γ ● H i g h s t a t i s t i c s I S R s i g n a l ● S t r o n g s u p p r e s s i o n o f F S R a n d Φ →π + π - π 0 ● Go o d π / μ s e p a r a t i o n w i t h M t a n d σ c u t s r k Mt r k M t - “ t r a c k ma s s ” a s s u mi n g 2 e q u a l ma s s r k p a r t i c l e s a n d 1 p h o t o n P h y s . L e t t . B 7 3 6 ( 2 0 1 4 ) 4 5 9 2 . 0 6 . 2 0 1 6 S e a r c h f o r d a r k f o r c e s a t K L OE - - ME S ON 2 0 1 6 8