Experimental measurement of the KSKS/KSKL ratio in antiproton annihilations at rest in gaseous hydrogen at 15 and 27 bar

被引：9

作者：

Adler, R

Alhalel, T

Angelopoulos, A

Apostolakis, A

Aslanides, E

Backenstoss, G

Bargassa, P

Bee, CP

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

Eckart, B

Eleftheriadis, C

Evangelou, I

Faravel, L

Fassnacht, P

Felder, C

FerreiraMarques, R

Fetscher, W

Fidecaro, M

Filipcic, A

Francis, D

Fry, J

Gabathuler, E

Gamet, R

Garreta, D

Gerber, HJ

Go, A

Guyot, C

Haselden, A

Hayman, PJ

HenryCouannier, F

Hollander, RW

Hubert, E

JonAnd, K

Kettle, PR

机构：

[1] UNIV ATHENS,GR-10679 ATHENS,GREECE

[2] BOSTON UNIV,BOSTON,MA 02215

[3] CERN,CH-1211 GENEVA 23,SWITZERLAND

[4] LIP,COIMBRA,PORTUGAL

[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,CNRS,CPPM,MARSEILLE,FRANCE

[14] IN2P3,CNRS,CSNSM,ORSAY,FRANCE

[15] PAUL SCHERRER INST,VILLIGEN,SWITZERLAND

[16] CTR ETUD SACLAY,CEA,DSM,DAPNIA,GIF SUR YVETTE,FRANCE

[17] KTH STOCKHOLM,STOCKHOLM,SWEDEN

[18] UNIV THESSALONIKI,GR-54006 THESSALONIKI,GREECE

[19] ETH ZURICH,IPP,ZURICH,SWITZERLAND

来源：

PHYSICS LETTERS B | 1997年 / 403卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(97)00489-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The ratio R between the branching fractions of (p) over bar p --> KSKS and (p) over bar p --> KSKL for antiprotons annihilating at rest in gaseous hydrogen at 27 bar pressure was measured with the CPLEAR detector to be R(27 bar) = 0.037 +/- 0.002. The fraction of P-wave annihilation at rest at this target density was deduced to be 0.45 +/- 0.06. A value of R was also measured at 15 bar, with less statistics, yielding R(15 bar) = 0.041 +/- 0.009. (C) 1997 Published by Elsevier Science B.V.

引用

页码：383 / 389

页数：7

共 7 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] DETERMINATION OF THE RELATIVE BRANCHING RATIOS FOR PPBAR-]PI+PI- AND PPBAR-]K+K- [J].

ADLER, R ;

ANGELOPOULOS, A ;

APOSTOLAKIS, A ;

ASLANIDES, E ;

BACKENSTOSS, G ;

BEE, CP ;

BENNET, J ;

BLOCH, P ;

BULA, C ;

BURGUN, C ;

CARLSON, P ;

CARVALHO, J ;

CHARDALAS, M ;

CHARALAMBOUS, S ;

COBBAERT, H ;

DEDOUSSIS, S ;

DEJARDIN, M ;

DERRE, J ;

DODGSON, M ;

DOUSSE, JC ;

DUCLOS, J ;

EALET, A ;

ECKART, B ;

FARAVEL, L ;

FASSNACHT, P ;

FAURE, JL ;

FELDER, C ;

FERREIRA-MARQUES, R ;

FETSCHER, W ;

FIDECARO, M ;

FILIPCIC, A ;

FRANCIS, D ;

FRY, JR ;

FUGLESANG, C ;

GABATHULER, E ;

GAMET, R ;

GARRETA, D ;

GERALIS, T ;

GERBER, HJ ;

GO, A ;

GUMPLINGER, P ;

GUYOT, C ;

HARRISON, PF ;

HAYMAN, PJ ;

HEYES, WG ;

HOLLANDER, RW ;

JOHNER, HU ;

JON-AND, K ;

JANSSON, K ;

KEREK, A .

PHYSICS LETTERS B, 1991, 267 (01) :154-158

[3] S- and P-state annihilation in (p)over-bar-p interactions at rest [J].

Batty, CJ .

NUCLEAR PHYSICS A, 1996, 601 (3-4) :425-444

[4] Protonium annihilation into KSKL at three different target densities [J].

Bertin, A ;

Bruschi, M ;

Capponi, M ;

Collamati, A ;

DAntone, I ;

DeCastro, S ;

Dona, R ;

Ferretti, A ;

Galli, D ;

Giacobbe, B ;

Marconi, U ;

Massa, I ;

Piccinini, M ;

Poli, M ;

SempriniCesari, N ;

Spighi, R ;

Vecchi, S ;

Vezzani, A ;

Vigotti, F ;

Villa, M ;

Vitale, A ;

Zoccoli, A ;

Zenoni, A ;

Corradini, M ;

Donzella, A ;

Rizzini, EL ;

Venturelli, L ;

Cicalo, C ;

Masoni, A ;

Puddu, G ;

Serci, S ;

Temnikov, PP ;

Usai, G ;

Gorchakov, OE ;

Prakhov, SN ;

Rozhdestvensky, AM ;

Guaraldo, C ;

Lanaro, A ;

Lucherini, V ;

Sapozhnikov, MG ;

Tretyak, VI ;

Gianotti, P ;

Nichitiu, F ;

Petrascu, C ;

Rosca, A ;

Ableev, VG ;

Cavion, C ;

Gastaldi, U ;

Lombardi, M ;

Maron, G .

PHYSICS LETTERS B, 1996, 386 (1-4) :486-494

[5]

BRUN R, 1984, DDEE841 CERN

[6]

YECHE C, 1994, 129634L CPLEAR PS

[7]

1996, PHYS REV D, V54, P1

← 1 →