Measurement of charge symmetry breaking by the comparison of pi + d ---> p p eta with pi- d ---> NN eta

Tippens, W.B.; Abaev, V.; Batinic, M.; Bekrenev, V.; Briscoe, W.J.; Chrien, R.E.; Clajus, M.; Isenhower, D.; Kozlenko, N.; Kruglov, S.

doi:10.1103/PhysRevD.63.052001

Measurement of charge symmetry breaking by the comparison of pi + d ---> p p eta with pi- d ---> NN eta

2001

16 pages

Published in:

Phys.Rev.D 63 (2001) 052001

DOI:

10.1103/PhysRevD.63.052001

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Abstract: (APS)

We report a measurement of charge symmetry breaking in the NNη system. We have measured the ratio of the differential cross sections of the charge-symmetric reactions π+d→ppη and π−d→nnη in the energy region of the η threshold. Our result is R≡dσ(π+d→ppη)/dσ(π−d→nnη)=0.938±0.009 after a phase-space correction is made for the difference in the threshold energies of the two reactions. The deviation of R from unity is an indication of charge symmetry breaking, which is mostly due to π0−η mixing. A theoretical model for η production which includes π0−η mixing was used to fit the data and yields a mixing angle of (1.5±0.4)°. Our result is consistent with the mixing angle determined in particle decay and isospin-forbidden processes as well as predictions by several theoretical analyses which yield ≈1° and another which yields ≈2°.

References(22)

Figures(0)

Charge symmetry, quarks and mesons

G.A. Miller
(
- TRIUMF and
- Washington U., Seattle
)
,
B.M.K. Nefkens
(
- UCLA and
- Boskovic Inst., Zagreb
)
,
I. Slaus
(
- UCLA and
- Boskovic Inst., Zagreb
)

- Phys.Rept. 194 (1990) 1-116
•
DOI:
- 10.1016/0370-1573(90)90102-8

Interference Between rho and omega Production in pi+- n --> pi+ pi- n at 3-GeV/c, 4-GeV/c and 6-GeV/c

et al.

- Phys.Rev.Lett. 33 (1974) 505
•
DOI:
- 10.1103/PhysRevLett.33.505

Comparative Study of rho0, omega, K* (890) and anti-K* (890) Production by Charge Exchange

et al.

- Phys.Rev.D 17 (1978) 1197
•
DOI:
- 10.1103/PhysRevD.17.1197

Review of particle physics. Particle Data Group

et al.

- Eur.Phys.J.C 3 (1998) 1-794
•
DOI:
- 10.1007/s10052-998-0104-x

Quark Masses

J. Gasser
(
- Bern U.
)
,
H. Leutwyler
(
- Bern U.
)

- Phys.Rept. 87 (1982) 77-169
•
DOI:
- 10.1016/0370-1573(82)90035-7

Charge effects in meson - nucleon coupling constants

Fan Wang
(
- CCAST World Lab, Beijing and
- Nanjing U.
)
,
Li-jian Deng
(
- CCAST World Lab, Beijing and
- Nanjing U.
)
,
Guang-han Wu
(
- CCAST World Lab, Beijing and
- Nanjing U.
)
,
Chun Wa Wong
(
- UCLA
)

- Nucl.Phys.A 537 (1992) 327-343
•
DOI:
- 10.1016/0375-9474(92)90359-R

pi N ---> eta N and eta N ---> eta N partial wave T matrices in a coupled, three channel model

Mijo Batinic
(
- Boskovic Inst., Zagreb
)
,
Ivo Slaus
(
- Boskovic Inst., Zagreb
)
,
Alfred Svarc
(
- Boskovic Inst., Zagreb
)
,
B.M.K. Nefkens
(
- UCLA
)

- Phys.Rev.C 51 (1995) 2310-2325,
- Phys.Rev.C 57 (1998) 1004-1005 (erratum)
•
e-Print:
- nucl-th/9501011
•
DOI:
- 10.1103/PhysRevC.57.1004

Fully relativistic calculation of the pi d --> eta N N process, with the final state interaction included

M. Batinic
(
- Boskovic Inst., Zagreb and
- UCLA
)
,
I. Slaus
(
- Boskovic Inst., Zagreb and
- UCLA
)
,
A. Svarc
(
- Boskovic Inst., Zagreb and
- UCLA
)
,
B.M.K. Nefkens
(
- Boskovic Inst., Zagreb and
- UCLA
)

- Few Body Syst.Suppl. 9 (1995) 219-222,

pi N ---> eta N and eta N ---> eta N partial wave T matrices in a coupled, three channel model

Mijo Batinic
(
- Boskovic Inst., Zagreb
)
,
Ivo Slaus
(
- Boskovic Inst., Zagreb
)
,
Alfred Svarc
(
- Boskovic Inst., Zagreb
)
,
B.M.K. Nefkens
(
- UCLA
)

- Phys.Rev.C 51 (1995) 2310-2325,
- Phys.Rev.C 57 (1998) 1004-1005 (erratum)
•
e-Print:
- nucl-th/9501011
•
DOI:
- 10.1103/PhysRevC.57.1004

- Phys.Scripta 58 15

Pole expansion of the deuteron vertex functions revisited

M.P. Locher
(
- PSI, Villigen
)
,
A. Svarc
(
- Boskovic Inst., Zagreb and
- PSI, Villigen
)

- Z.Phys.A 338 (1991) 89-94,
- Z. Phys. A338 (1991) 89-94 and Villigen PSI - PSI-PR-90-014 (90,rec.Jun.) 23 p
•
DOI:
- 10.1007/BF01279118

Deuteron vertex functions including meson exchange corrections

M.P. Locher
(
- PSI, Villigen and
- Boskovic Inst., Zagreb
)
,
A. Svarc
(
- PSI, Villigen and
- Boskovic Inst., Zagreb
)

- Fizika 22 (1990) 549-566

Performance of a BGO - NaI eta spectrometer

et al.

- Nucl.Instrum.Meth.A 374 (1996) 299-302
•
DOI:
- 10.1016/0168-9002(96)00181-7

PION - NUCLEON PARTIAL WAVE ANALYSIS

R.E. Cutkosky
(
- Carnegie Mellon U.
)
,
R.E. Hendrick
(
- Carnegie Mellon U.
)
,
J.W. Alcock
(
- Carnegie Mellon U.
)
,
Y.A. Chao
(
- Carnegie Mellon U.
)
,
R.G. Lipes
(
- Carnegie Mellon U.
)

et al.

- Phys.Rev.D 20 (1979) 2804
•
DOI:
- 10.1103/PhysRevD.20.2804

Pion - Nucleon Partial Wave Amplitudes

R.E. Cutkosky
(
- Carnegie Mellon U.
)
,
C.P. Forsyth
(
- Carnegie Mellon U.
)
,
R.E. Hendrick
(
- Carnegie Mellon U.
)
,
R.L. Kelly
(
- LBL, Berkeley
)

- Phys.Rev.D 20 (1979) 2839
•
DOI:
- 10.1103/PhysRevD.20.2839

Differential Cross-sections for $\pi^+ P$ and $\pi^- P$ Elastic Scattering From 378-{MeV}/c to 687-{MeV}/c

M.E. Sadler
(
- UCLA and
- Abilene Christian U.
)
,
W.J. Briscoe
(
- UCLA and
- Abilene Christian U.
)
,
D.H. Fitzgerald
(
- UCLA and
- Abilene Christian U.
)
,
B.M.K. Nefkens
(
- UCLA and
- Abilene Christian U.
)
,
C.J. Seftor
(
- UCLA and
- Abilene Christian U.
)

- Phys.Rev.D 35 (1987) 2718-2735,
- Phys. Rev. D35 ( 1987) 2718-2735
•
DOI:
- 10.1103/PhysRevD.35.2718

Measurement of Differential Cross-sections of $\pi^+ P$ and $\pi^- P$ Elastic Scattering in the Region of Low Lying Pion Nucleon Resonances

V.A. Gordeev
(
- St. Petersburg, INP
)
,
V.P. Koptev
(
- St. Petersburg, INP
)
,
S.P. Kruglov
(
- St. Petersburg, INP
)
,
L.A. Kuzmin
(
- St. Petersburg, INP
)
,
A.A. Kulbardis
(
- St. Petersburg, INP
)

et al.

- Nucl.Phys.A 364 (1981) 408-428,
- Nucl. Phys. A364 ( 1981) 408-428
•
DOI:
- 10.1016/0375-9474(81)90579-0

Pion induced eta production in the deuteron

H. Garcilazo
(
- CINVESTAV, IPN
)
,
M.T. Pena
(
- Lisbon U. and
- Lisbon, IST
)

- Phys.Rev.C 59 (1999) 2389-2395
•
DOI:
- 10.1103/PhysRevC.59.2389

Pi - eta mixing from QCD sum rules

- Phys.Lett.B 343 (1995) 7-12
•
e-Print:
- hep-ph/9403380
•
DOI:
- 10.1016/0370-2693(94)01461-K

Off-shell behavior of the pi - eta mixing amplitude

J. Piekarewicz
(
- Florida State U., SCRI
)

- Phys.Rev.C 48 (1993) 1555-1561,
- Phys. Rev. C48 (1993) 1555-1561. and Florida State Univ. Tallahassee - FSU-SCRI-93-038 (93/03) 13 p. and (307833)
•
e-Print:
- nucl-th/9303005
•
DOI:
- 10.1103/PhysRevC.48.1555

Implications of eta eta-prime mixing for the decay eta ---> 3 pi

H. Leutwyler
(
- Bern U. and
- CERN
)

- Phys.Lett.B 374 (1996) 181-185
•
e-Print:
- hep-ph/9601236
•
DOI:
- 10.1016/0370-2693(96)00167-0

eta-prime eta pi0 mixing

B. Bagchi
(
- Vidyasagar U.
)
,
A. Lahiri
(
- Surendranath Coll.
)
,
S. Niyogi
(
- Bijay Krishna Girl's Coll.
)

- Phys.Rev.D 41 (1990) 2871-2876
•
DOI:
- 10.1103/PhysRevD.41.2871