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4 a0(980) 4 4 .

00, C 30 00 3.

3 4 oo oo oo 3o 4o.

00.

30 a0 00 a0 30 - 00 C 0 30 3 00 30 00 30 a0 00 C 0 30 3 00 30 00 30 4 -p M0n M0 4 4 - 48 32 38 38 2 4 8 8 2 1919 X0 R > Rmin Rcnt > Rmincnt E > Emin Rmin = 45 Rmincnt = 40 Emin = 0.5 . e+e- - - BR( ) = (5 2) 10-4 0 3 0 -p -p n 3 3 0 -p 0n , - t |t| - 0, 0 M /M 3% /M 1.5% (8.5 0.5)% BR( ) = (8.3 2.1) 10-4. - BR( ) BR(0 ) 00. , , 00 0 0 00 30 00 K(892) 0 K Ks 0 30, 0 0 Ks 0 s Ks 2 < 2 K Kth smin < s < smax 2, smin, smax Kth 2 |t| < 0.1 00 40 14 0 BR( 00) = (7.2 2.6) 10-5. C BR( 30) < 3 10-4, BR( 0) < 1 10-3. 3 BR( 3 < 2 10-4. -p n - 1.22 106 2 BR( 2) = 0.39 3.73 106 2 x 10 1500 3001020051000 450 500 550 600 650 450 500 550 600 6M(2), MeV M(3), MeV 2 3o o mode N/5 MeV N/5 MeV Nexp (W ( mode) + dW ( mode)) BR( mode) <, ( mode) N W ( mode) dW ( mode) ( mode) Nexp N 4 3 5 10-4 1.6 10- 4 2.8 10- oo 4.3 10-4 3.5 10- oo 1.7 10- oo 4.0 10- 3o 2.4 10- 4o 6.9 10-7 2.0 10- 00. |M|2 1 + aY + bY + cX + dX2, a, b, c, d X Y 3 m T X = (T1 - T2), Y = (2 + ) - 1, 0 Q m0 Q T1, T2, T 0 0 (T1 > T2) Q = T1 + T2 + T = m m - 2m0 0 0 M2 |1 + Y |2 + cX + dX2, c = 0 +- -p n - 00 0 > 930 < M(00) < 990 M( ) = M(00) > F (X, Y ) = A(F1(X, Y )+aF2(X, Y )+bF3(X, Y )+cF4(X, Y )+dF5(X, Y )) a, b, c, d A 40102050 400 600 800 800 900 1000 11M(), MeV M(), MeV 0 00 920 - 1000 00 Fi(X, Y ) wi, w1 = 1, w2 = Ytr, w3 = Ytr, w4 = Xtr, w5 = Xtr Xtr Ytr X - Y (N(X, Y ) - F (X, Y ))2 =, N X,Y N(X, Y ) (X, Y ) N = N(X, Y ) N/5 MeV N/5 MeV (2/NDF = 78./84) a = -0.066 0.016 1.000 -0.395 0.191 -0.2 b = -0.063 0.028 1.000 -0.600 0.5 c = -0.107 0.096 1.000 -0.9d = 0.018 0.078 1.0 333222211110 0 0 -1.5 0 1.5 -1.5 0 1.5 -1.5 0 1.5 -1.5 0 1.1221110 0 -1.5 0 1.5 -1.5 0 1.5 -1.5 0 1. Y X c = 0 2/NDF = 79./ a = -0.067 0.016 1.000 0.151 -0.6 b = -0.064 0.029 1.00 -0.406 d = -0.067 0.020 1.0 2/NDF = 84./ Re() = -0.042 0.008 1.000 -0.024 -0.1 Im() = -0.00 0.07 1.000 -0.017 d = -0.054 0.019 1.0 b m2(00) 3o, G 3 +-o +-o 6 3 00 K(892) -p K(892) o K(892) Ks o 3o no > n, o, > 0.02 oo 3o o Ks o o Ks o oo o Ks o 3o 960 235 BR( BR( 3o) = (1.8 0.4) 10-3 |M|2 1 + 2Z Z r 6 M i Z = ( )2 = (E - )2. o o rmax (M - 3M )2 i= 715120 100 150 200 800 900 1000 11M(), MeV M(3), MeV o oo (o) = 8.5 3o Z Z Z o Ks o M( ) = M(3o) > Z N/5 MeV N/10 MeV F (Z) = A(F1(Z) + aF2(Z)) a A F (Z) Fi(Z) wi, w1 = 1, w2 = Ztr Ztr Z Z Z = 0.0110 0 0.25 0.5 0.75 1 0 0.25 0.5 0.75 Z Z Z 3o o Ks o oo Z (N(Z) - F (Z))2 =, N Z N(Z) (Z) N = N(Z) (2/NDF = 14.4/13) = -0.59 0.18 = 0.1 1.7 -2.7 1. 00 a0 00 a0(980) f0 (980) (a) (b) (c) a 0 00 A = A(s1) + A(s2) + A(s3), A A s1 = (p2 + p3)2, s2 = (p1 + p3)2, s3 = (p1 + p2)2.







a0 g g p 0 (pp) a0 pp a0 a0 a0 g 00 4 a0 = -4.0 0.- = 35 4.

a0 -1 - 5.7 < < 8.1 -1 - 4.6 < < 6.6.

a0 a0 111120 10 0.45 0.0 0.575 0.50.7 0.0.6 0.0.5 0.0.7 0.8675645433220.45 0.110 0.575 0.50.7 0.0.6 0.0.5 0.0.7 0. a0 - aa0 a0 - a0 a0 Y 00 3 I 0 I = 0 I = 0 = 0 + 0, | = | I=0 + | I=1.

I=1 I= 0 I=| I=1 md - mu sin 10-2, ms 3 A( 30) = {A (s12) + A (s13) + A (s23)} + a {Aa (s12) + Aa (s13) + Aa (s23)}. sij = (pi + pj)2 A(s) Aa(s) a , a I=1 I=I=I=1 I=1 I=I=0 I=( ) ( ) ( ) I=1 I=0 I=0 (a0)I=I=1 I=0 I=(a) (b) (c) 3 30 = 2B + 2Baa + 2 aBa, th a B Baa Ba a0 a0 , a 10- = -0.59 0.18 , a / a 0.0.-0.-0.-0.04 -0.03 -0.02 -0.01 0 0.01 0.02 0.03 0. , a 3 2 a0 0 a - 00 C 0 30 3 00 30 00 30 a0 00 00 30 00 a0 0 00 30, 0+- 30, 0+- 4 A LTEX 60 84/16.

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