First direct observation of time-reversal non-invariance in the neutral-kaon system

被引：192

作者：

Angelopoulos, A ^{[1
]}

Apostolakis, A

Aslanides, E

Backenstoss, G

Bargassa, P

Behnke, O

Benelli, A

Bertin, V

Blanc, F

Bloch, P

Carlson, P

Carroll, M

Cawley, E

Charalambous, S

Chertok, MB

Danielsson, M

Dejardin, M

Derre, J

Ealet, A

Eleftheriadis, C

Faravel, L

Fetscher, W

Fidecaro, M

Filipcic, A

Francis, D

Fry, J

Gabathuler, E

Gamet, R

Gerber, HJ

Go, A

Haselden, A

Hayman, PJ

Henry-Couannier, F

Hollander, RW

Jon-And, K

Kettle, PR

Kokkas, P

Kreuger, R

Le Gac, R

Leimgruber, F

Mandic, I

Manthos, N

Marel, G

Mikuz, M

Miller, J

Montanet, F

Muller, A

Nakada, T

Pagels, B

Papadopoulos, I

机构：

[1] Univ Athens, GR-10679 Athens, Greece

[2] Univ Basel, Basel, Switzerland

[3] Boston Univ, Boston, MA 02215 USA

[4] CERN, Geneva, Switzerland

[5] Univ Coimbra, P-3000 Coimbra, Portugal

[6] Delft Univ Technol, NL-2600 AA Delft, Netherlands

[7] Univ Fribourg, CH-1700 Fribourg, Switzerland

[8] Univ Ioannina, GR-45110 Ioannina, Greece

[9] Univ Liverpool, Liverpool L69 3BX, Merseyside, England

[10] Univ Ljubljana, Jozef Stefan Inst, Ljubljana 61000, Slovenia

[11] Univ Ljubljana, Dept Phys, Ljubljana 61000, Slovenia

[12] Univ Aix Marseille 2, F-13284 Marseille 07, France

[13] IN2P3, CSNSM, CNRS, Orsay, France

[14] Paul Scherrer Inst, Villigen, Switzerland

[15] CE Saclay, DAPNIA, DSM, CEA, Gif Sur Yvette, France

[16] Royal Inst Technol, S-10044 Stockholm, Sweden

[17] Univ Thessaloniki, Salonika, Greece

[18] ETH, IPP, Zurich, Switzerland

来源：

PHYSICS LETTERS B | 1998年 / 444卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(98)01356-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the first observation of time-reversal symmetry violation through a comparison of the probabilities of (K) over bar(0) transforming into K-0 and K-0 into (K) over bar(0) as a function of the neutral-kaon eigentime t. The comparison is based on the analysis of the neutral-kaon semileptonic decays recorded in the CPLEAR experiment. There, the strangeness of the neutral kaon at time t = 0 was tagged by the kaon charge in the reaction <p(p)over bar> --> K (+/-) pi (+/-) K-0 ((K) over bar(0)) at rest, whereas the strangeness of the kaon at the decay time t = tau was tagged by the lepton charge in the final state. An average decay-rate asymmetry [R((K) over bar<INF>t=0</INF>0 --> e+pi-nu<INF>t=tau</INF>) - R(K<INF>t=0</INF>0 --> e-pi+<(nu)over bar><INF>t=tau</INF>)/R((K) over bar<INF>t=0</INF>0 --> e+pi-nu<INF>t=tau</INF>) + R(K<INF>t=0</INF>0 --> e-pi+<(nu)over bar><INF>t=tau</INF>)] = (6.6 +/- 1.3<INF>stat</INF> +/- 1.0<INF>syst</INF>) X 10-3 was measured over the interval 1 tau(S) < tau < 20 tau(S), thus leading to evidence for time-reversal non-invariance. (C) 1998 Elsevier Science B.V. All righs reserved.

引用

页码：43 / 51

页数：9

共 12 条

[1] The design, construction and performance of the ALEPH silicon vertex detector [J].

Mours, B ;

Boudreau, J ;

Jacobsen, RG ;

Mattison, T ;

Martin, EB ;

Menary, S ;

Moneta, L ;

Redlinger, G ;

Focardi, E ;

Parrini, G ;

Scarlini, E ;

Walther, S ;

Carr, J ;

Coyle, P ;

Drinkard, J ;

Rousseau, D ;

Schwemling, P ;

Bauer, C ;

Becker, H ;

Brown, D ;

Cattaneo, P ;

Dietl, H ;

Hauff, D ;

Holl, P ;

Lauber, J ;

Lutz, G ;

Lutjens, G ;

Manner, W ;

Moser, HG ;

Schwarz, AS ;

Settles, R ;

Seywerd, HCJ ;

Struder, L ;

Waltermann, G ;

Batignani, G ;

Bosi, F ;

Bosisio, L ;

Carpinelli, M ;

CiocciMarrocchesi, A ;

DellOrso, R ;

Forti, F ;

Giorgi, M ;

Piccinini, S ;

Profeti, A ;

Rizzi, D ;

Rizzo, G ;

Tonelli, G ;

Triggiani, G ;

VanniniCastaldi, C ;

Verdini, PG .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 379 (01) :101-115

[2] MEASUREMENT OF THE K-L-K-S MASS DIFFERENCE USING SEMILEPTONIC DECAYS OF TAGGED NEUTRAL KAONS [J].

ADLER, R ;

ALHALEL, T ;

ANGELOPOULOS, A ;

APOSTOLAKIS, A ;

ASLANIDES, E ;

BACKENSTOSS, G ;

BEE, CP ;

BEHNKE, O ;

BENELLI, A ;

BENNET, J ;

BERTIN, V ;

BIENLEIN, JK ;

BLANC, F ;

BLOCH, P ;

BULA, C ;

CARLSON, P ;

CARROLL, M ;

CARVALHO, J ;

CAWLEY, E ;

CHARALAMBOUS, S ;

CHARDALAS, M ;

CHARDIN, G ;

CHERTOK, MB ;

CODY, A ;

DANIELSON, M ;

DEDOUSSIS, S ;

DEJARDIN, M ;

DERRE, J ;

DODGSON, M ;

DUCLOS, J ;

EALET, A ;

ECKART, B ;

ELEFTHERIADIS, C ;

EVANGELOU, I ;

FARAVEL, L ;

FASSNACHT, P ;

FAURE, JL ;

FELDER, C ;

FERREIRAMARQUES, R ;

FETSCHER, W ;

FIDECARO, M ;

FILIPCIC, A ;

FRANCIS, D ;

FRY, J ;

FUGLESANG, C ;

GABATHULER, E ;

GAMET, R ;

GARRETA, D ;

GERALIS, T ;

GERBER, HJ .

PHYSICS LETTERS B, 1995, 363 (04) :237-242

[3] MEASUREMENT OF THE CP VIOLATION PARAMETER ETA(+-) USING TAGGED K-0 AND (K)OVER-BAR(0) [J].

ADLER, R ;

ALHALEL, T ;

ANGELOPOULOS, A ;

APOSTOLAKIS, A ;

ASLANIDES, E ;

BACKENSTOSS, G ;

BEE, CP ;

BEHNKE, O ;

BENELLI, A ;

BENNET, J ;

BERTIN, V ;

BIENLEIN, JK ;

BLANC, F ;

BLOCH, P ;

BULA, C ;

CARLSON, P ;

CARROLL, M ;

CARVALHO, J ;

CAWLEY, E ;

CHARALAMBOUS, S ;

CHARDALAS, M ;

CHARDIN, G ;

CHERTOK, MB ;

CODY, A ;

DANIELSSON, M ;

DEDOUSSIS, S ;

DEJARDIN, M ;

DERRE, J ;

DODGSON, M ;

DUCLOS, J ;

EALET, A ;

ECKART, B ;

ELEFTHERIADIS, C ;

EVANGELOU, I ;

FARAVEL, L ;

FASSNACHT, P ;

FAURE, JL ;

FELDER, C ;

FERREIRAMARQUES, R ;

FETSCHER, W ;

FIDECARO, M ;

FILIPCIC, A ;

FRANCIS, D ;

FRY, J ;

FUGLESANG, C ;

GABATHULER, E ;

GAMET, R ;

GARRETA, D ;

GERALIS, T ;

GERBER, HJ .

PHYSICS LETTERS B, 1995, 363 (04) :243-248

[4] ON SEPARATE CPT AND T VIOLATION CHECKS IN KO-KBARO COMPLEX [J].

AHARONY, A .

LETTERE AL NUOVO CIMENTO, 1970, 3 (25) :791-&

[5] Measurement of the neutral kaon regeneration amplitude in carbon at momenta below 1 GeV/c [J].

Angelopoulos, A ;

Apostolakis, A ;

Aslanides, E ;

Backenstoss, G ;

Bargassa, P ;

Behnke, O ;

Benelli, A ;

Bertin, V ;

Blanc, F ;

Bloch, P ;

Carlson, P ;

Carroll, M ;

Carvalho, J ;

Cawley, E ;

Charalambous, S ;

Chardin, G ;

Chertok, MB ;

Cody, A ;

Danielsson, M ;

Dejardin, M ;

Derre, J ;

Ealet, A ;

Eleftheriadis, C ;

Evangelou, I ;

Faravel, L ;

Ferreira-Marques, R ;

Fetscher, W ;

Fidecaro, M ;

Filipcic, A ;

Francis, D ;

Fry, J ;

Gabathuler, E ;

Gamet, R ;

Garreta, D ;

Gerber, HJ ;

Go, A ;

Haselden, A ;

Hayman, PJ ;

Henry-Couannier, F ;

Hollander, RW ;

Hubert, E ;

Jon-And, K ;

Kettle, PR ;

Kokkas, P ;

Kreuger, R ;

Le Gac, R ;

Leimgruber, F ;

Liolios, A ;

Machado, E ;

Mandic, I .

PHYSICS LETTERS B, 1997, 413 (3-4) :422-430

[6] TESTING CP AND CPT VIOLATION IN THE NEUTRAL KAON SYSTEM AT A PHI-FACTORY [J].

BUCHANAN, CD ;

COUSINS, R ;

DIB, C ;

PECCEI, RD ;

QUACKENBUSH, J .

PHYSICAL REVIEW D, 1992, 45 (11) :4088-4107

[7] Review of Particle Physics [J].

The European Physical Journal C - Particles and Fields, 1998, 3 (1-4) :1-783

[8]

*CPLEAR, 1995, CPLEARDET9502

[9] WHAT IS NOT INVARIANT UNDER TIME REVERSAL [J].

KABIR, PK .

PHYSICAL REVIEW D, 1970, 2 (03) :540-&

[10]

LEE TD, 1981, PARTICLE PHYSICS INT

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