epsilon'/epsilon and rare K(L) decays from KTeV experiment

Hsiung, Y. B.

doi:10.1016/S0920-5632(01)01145-8

Title: epsilon'/epsilon and rare K(L) decays from KTeV experiment

Conference · Mon Jan 01 00:00:00 EST 2001 · Nucl.Phys.B Proc.Suppl.

DOI:https://doi.org/10.1016/S0920-5632(01)01145-8· OSTI ID:773203

^[1]

Fermilab

The authors update the current status for the measurement of the direct-CP violation parameters {epsilon}{prime}/{epsilon} in the KTeV experiment at Fermilab. Substantial statistics have been accumulated during the 1996-7 run and 1999 run for both {epsilon}{prime}/{epsilon} and rare K{sub L} decay searches. The first KTeV result on {epsilon}{prime}/{epsilon} published last year was Re({epsilon}{prime}/{epsilon}) = (28.0 {+-} 4.1) x 10{sup {minus}4} based on the 23% data from 1996-7 run. Combining with the previous E731, NA31 and the recent preliminary NA48 results, the grand average is Re({epsilon}{prime}/{epsilon}) = (19.3 {+-} 3.6) x 10{sup {minus}4} (with S = 1:49), more than 5{sigma} above zero. More data from both KTeV and NA48 after completing the analysis will further improve the precision of this measurement in the near future and hopefully further improve the agreement. New results on the branching ratio and form factor measurements of K{sub L} {r_arrow} {mu}{sup +} {mu}{sup {minus}} {gamma} using 1997 data are also presented. We find that BR(K{sub L} {r_arrow} {mu}{sup +} {mu}{sup {minus}} {gamma}) = (3.66 {+-} 0.04{sub stat} {+-} 0.07{sub syst}) x 10{sup {minus}7}. The form factor parameter {alpha}{sub K}* is measured to be {alpha}{sub K}* = {minus}0.157{sub {minus}0.027}{sup +0.025}. We make the first measurement of the parameter {alpha} from the D'Ambrosio, Isidori, and Portoles form factor, finding {alpha} = {minus}1.53 {+-} 0.09. This measurement of {alpha} limits the CKM parameter {rho} > {minus}0.2.

View Conference

Cite

Export

Save

Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: KTeV

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 773203

Report Number(s):: FERMILAB-CONF-00-345-E; oai:inspirehep.net:552387; TRN: US0100660

Journal Information:: Nucl.Phys.B Proc.Suppl., Vol. 96; Other Information: PBD: 16 Jan 2001

Country of Publication:: United States

Language:: English

References (23)

Evidence for the $2 π$ Decay of the $K_{2}^{0}$ Meson Christenson, J. H.; Cronin, J. W.; Fitch, V. L. Physical Review Letters, Vol. 13, Issue 4 https://doi.org/10.1103/PhysRevLett.13.138	journal	July 1964
The search for direct $CP$ violation Winstein, Bruce; Wolfenstein, Lincoln Reviews of Modern Physics, Vol. 65, Issue 4 https://doi.org/10.1103/RevModPhys.65.1113	journal	October 1993
Observation of $CP$ Violation in $K_{L} \to π^{+} π^{-} e^{+} e^{-}$ Decays Alavi-Harati, A.; Albuquerque, I. F.; Alexopoulos, T. Physical Review Letters, Vol. 84, Issue 3 https://doi.org/10.1103/PhysRevLett.84.408	journal	January 2000
C P -Violation in the Renormalizable Theory of Weak Interaction Kobayashi, Makoto; Maskawa, Toshihide Progress of Theoretical Physics, Vol. 49, Issue 2 https://doi.org/10.1143/PTP.49.652	journal	February 1973
First result on a new measurement of ε’/ε in the neutral-kaon system Woods, M.; Nishikawa, K.; Patterson, J. R. Physical Review Letters, Vol. 60, Issue 17 https://doi.org/10.1103/PhysRevLett.60.1695	journal	April 1988
First evidence for direct CP violation Burkhardt, H.; Clarke, P.; Coward, D. Physics Letters B, Vol. 206, Issue 1 https://doi.org/10.1016/0370-2693(88)91282-8	journal	May 1988
Determination of Re(ɛ’/ɛ) by the simultaneous detection of the fourKL,S→ππ decay modes Patterson, J. R.; Barker, A.; Briere, R. A. Physical Review Letters, Vol. 64, Issue 13 https://doi.org/10.1103/PhysRevLett.64.1491	journal	March 1990
Measurement of the CP -violation parameter Re(ɛ’/ɛ) Gibbons, L. K.; Barker, A. R.; Briere, R. A. Physical Review Letters, Vol. 70, Issue 9 https://doi.org/10.1103/PhysRevLett.70.1203	journal	March 1993
A new measurement of direct CP violation in the neutral kaon system Barr, G. D.; Buchholz, P.; Carosi, R. Physics Letters B, Vol. 317, Issue 1-2 https://doi.org/10.1016/0370-2693(93)91599-I	journal	November 1993
Observation of Direct CP Violation in $K_{S, L} \to π π$ Decays Alavi-Harati, A.; Albuquerque, I. F.; Alexopoulos, T. Physical Review Letters, Vol. 83, Issue 1 https://doi.org/10.1103/PhysRevLett.83.22	journal	July 1999
A new measurement of direct CP violation in two pion decays of the neutral kaon Fanti, V.; Lai, A.; Marras, D. Physics Letters B, Vol. 465, Issue 1-4 https://doi.org/10.1016/S0370-2693(99)01030-8	journal	October 1999
Violation of $CP$ Invariance and the Possibility of Very Weak Interactions Wolfenstein, L. Physical Review Letters, Vol. 13, Issue 18 https://doi.org/10.1103/PhysRevLett.13.562	journal	November 1964
Search for the Decay $K_{L} \to π^{0} μ^{+} μ^{-}$ Alavi-Harati, A.; Albuquerque, I. F.; Alexopoulos, T. Physical Review Letters, Vol. 84, Issue 23 https://doi.org/10.1103/PhysRevLett.84.5279	journal	June 2000
Determining the Phase of a Strong Scattering Amplitude from Its Momentum Dependence to Better Than 1°: The Example of Kaon Regeneration Briere, Roy A.; Winstein, Bruce Physical Review Letters, Vol. 75, Issue 3 https://doi.org/10.1103/PhysRevLett.75.402	journal	July 1995
Testing the origin of the rule through KL dalitz decays Bergström, L.; Massó, E.; Singer, P. Physics Letters B, Vol. 131, Issue 1-3 https://doi.org/10.1016/0370-2693(83)91127-9	journal	November 1983
Short-distance information from B(KL→μ+μ−) D'Ambrosio, G.; Isidori, G.; Portolés, J. Physics Letters B, Vol. 423, Issue 3-4 https://doi.org/10.1016/S0370-2693(98)00146-4	journal	March 1998
Measurement of the rate of the decay KL→e+e−γ and observation of a form factor in this decay Barr, G. D.; Carosi, R.; Coward, D. Physics Letters B, Vol. 240, Issue 1-2 https://doi.org/10.1016/0370-2693(90)90446-D	journal	April 1990
Measurement of the branching ratio and form factor for $K_{L}$ → $e^{+}$ $e^{-}$ γ Ohl, K. E.; Adair, R. K.; Greenlee, H. B. Physical Review Letters, Vol. 65, Issue 12 https://doi.org/10.1103/PhysRevLett.65.1407	journal	September 1990
Measurement of the decay rate and form factor parameter in the decay KL→e+e−γ Fanti, V.; Lai, A.; Musa, L. Physics Letters B, Vol. 458, Issue 4 https://doi.org/10.1016/S0370-2693(99)00561-4	journal	July 1999
Measurement of the Branching Ratio and Form Factor of $K_{L} \to μ^{+} μ^{-} γ$ Spencer, M. B.; Arisaka, K.; Roberts, D. Physical Review Letters, Vol. 74, Issue 17 https://doi.org/10.1103/PhysRevLett.74.3323	journal	April 1995
Electromagnetic Contribution to the Decays $K_{S} \to l \bar{l}$ and $K_{L} \to l \bar{l}$ Sehgal, L. M. Physical Review, Vol. 183, Issue 5 https://doi.org/10.1103/PhysRev.183.1511	journal	July 1969
KL →μ+μ−, top mass and bottom lifetime Bergström, L.; Massó, E.; Singer, P. Physics Letters B, Vol. 134, Issue 5 https://doi.org/10.1016/0370-2693(84)90019-4	journal	January 1984
beyond the standard model Grossman, Yuval; Nir, Yosef Physics Letters B, Vol. 398, Issue 1-2 https://doi.org/10.1016/S0370-2693(97)00210-4	journal	April 1997

Similar Records

Measurement of the Branching Ratio and Form Factor of K{sub L}{yields}{mu}{sup +}{mu}

Journal Article · Mon Aug 13 00:00:00 EDT 2001 · Physical Review Letters · OSTI ID:773203

Alavi-Harati, A; Alexopoulos, T; Arenton, M; +7 more

Latest results on the direct CP violation measurements:. Epsilon. prime /. epsilon

Conference · Sun Mar 01 00:00:00 EST 1992 · OSTI ID:773203

Hsiung, Yee B

Latest results on the direct CP violation measurements: {Epsilon}{prime}/{epsilon}

Technical Report · Sun Mar 01 00:00:00 EST 1992 · OSTI ID:773203

Hsiung, Yee B

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
DECAY
FERMILAB
FORM FACTORS
STATISTICS

Title: epsilon'/epsilon and rare K(L) decays from KTeV experiment

Citation Formats

References (23)

Similar Records

Related Subjects