Study of K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma} decay with ISTRA+ setup
Results of study of the K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{gamma} decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be R=(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-...
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| Veröffentlicht in: | Physics of atomic nuclei 2007-04, Vol.70 (4) |
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| creator | Akimenko, S. A. Bolotov, V. N. Britvich, G. I. Datsko, K. V. Duk, V. A. Filin, A. P. Gushchin, E. N. Inyakin, A. V. Khmelnikov, V. A. Konstantinov, A. S. Konstantinov, V. F. Korolkov, I. Yu Laptev, S. V. Lebedev, V. A. Leontiev, V. M. Mazurov, A. E. Novikov, V. P. Obraztsov, V. F. Polyakov, V. A. Polyarush, A. Yu |
| description | Results of study of the K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{gamma} decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be R=(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e})) (1.81{+-}0.03(stat.){+-}0.07(syst.)) x 10{sup -2} for E*{sub {gamma}} > 10 MeV and {theta}*{sub e{gamma}} > 10{sup o}. For comparison with the previous experiment the branching ratio with cuts E*{sub {gamma}} > 10 MeV, 0.6 < cos {theta}*{sub e{gamma}} < 0.9 is calculated: R (Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e})) (0.47{+-}0.02(stat.) {+-} 0.03(syst.)) x 10{sup -2}. For the cuts E*{sub {gamma}} > 30 MeV and {theta}*{sub e{gamma}} > 20{sup o}, used in most theoretical papers, Br (3.06 {+-} 0.09(stat.) {+-} 0.14(syst.)) x 10{sup -4}. For the asymmetry we get A{sub {xi}} = -0.015 {+-} 0.021. At present it is the best estimate of this asymmetry. |
| doi_str_mv | 10.1134/S1063778807040114 |
| format | Article |
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V. ; Khmelnikov, V. A. ; Konstantinov, A. S. ; Konstantinov, V. F. ; Korolkov, I. Yu ; Laptev, S. V. ; Lebedev, V. A. ; Leontiev, V. M. ; Mazurov, A. E. ; Novikov, V. P. ; Obraztsov, V. F. ; Polyakov, V. A. ; Polyarush, A. Yu</creator><creatorcontrib>Akimenko, S. A. ; Bolotov, V. N. ; Britvich, G. I. ; Datsko, K. V. ; Duk, V. A. ; Filin, A. P. ; Gushchin, E. N. ; Inyakin, A. V. ; Khmelnikov, V. A. ; Konstantinov, A. S. ; Konstantinov, V. F. ; Korolkov, I. Yu ; Laptev, S. V. ; Lebedev, V. A. ; Leontiev, V. M. ; Mazurov, A. E. ; Novikov, V. P. ; Obraztsov, V. F. ; Polyakov, V. A. ; Polyarush, A. Yu</creatorcontrib><description>Results of study of the K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{gamma} decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be R=(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e})) (1.81{+-}0.03(stat.){+-}0.07(syst.)) x 10{sup -2} for E*{sub {gamma}} > 10 MeV and {theta}*{sub e{gamma}} > 10{sup o}. For comparison with the previous experiment the branching ratio with cuts E*{sub {gamma}} > 10 MeV, 0.6 < cos {theta}*{sub e{gamma}} < 0.9 is calculated: R (Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e})) (0.47{+-}0.02(stat.) {+-} 0.03(syst.)) x 10{sup -2}. For the cuts E*{sub {gamma}} > 30 MeV and {theta}*{sub e{gamma}} > 20{sup o}, used in most theoretical papers, Br (3.06 {+-} 0.09(stat.) {+-} 0.14(syst.)) x 10{sup -4}. For the asymmetry we get A{sub {xi}} = -0.015 {+-} 0.021. At present it is the best estimate of this asymmetry.</description><identifier>ISSN: 1063-7788</identifier><identifier>EISSN: 1562-692X</identifier><identifier>DOI: 10.1134/S1063778807040114</identifier><language>eng</language><publisher>United States</publisher><subject>ASYMMETRY ; BRANCHING RATIO ; COMPARATIVE EVALUATIONS ; ELECTRON ANTINEUTRINOS ; ELECTRONS ; GAMMA RADIATION ; KAONS MINUS ; MEV RANGE ; PARTICLE DECAY ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; PIONS NEUTRAL</subject><ispartof>Physics of atomic nuclei, 2007-04, Vol.70 (4)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/21075896$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Akimenko, S. A.</creatorcontrib><creatorcontrib>Bolotov, V. N.</creatorcontrib><creatorcontrib>Britvich, G. I.</creatorcontrib><creatorcontrib>Datsko, K. V.</creatorcontrib><creatorcontrib>Duk, V. A.</creatorcontrib><creatorcontrib>Filin, A. P.</creatorcontrib><creatorcontrib>Gushchin, E. N.</creatorcontrib><creatorcontrib>Inyakin, A. V.</creatorcontrib><creatorcontrib>Khmelnikov, V. A.</creatorcontrib><creatorcontrib>Konstantinov, A. S.</creatorcontrib><creatorcontrib>Konstantinov, V. F.</creatorcontrib><creatorcontrib>Korolkov, I. Yu</creatorcontrib><creatorcontrib>Laptev, S. V.</creatorcontrib><creatorcontrib>Lebedev, V. A.</creatorcontrib><creatorcontrib>Leontiev, V. M.</creatorcontrib><creatorcontrib>Mazurov, A. E.</creatorcontrib><creatorcontrib>Novikov, V. P.</creatorcontrib><creatorcontrib>Obraztsov, V. F.</creatorcontrib><creatorcontrib>Polyakov, V. A.</creatorcontrib><creatorcontrib>Polyarush, A. Yu</creatorcontrib><title>Study of K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma} decay with ISTRA+ setup</title><title>Physics of atomic nuclei</title><description>Results of study of the K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{gamma} decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be R=(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e})) (1.81{+-}0.03(stat.){+-}0.07(syst.)) x 10{sup -2} for E*{sub {gamma}} > 10 MeV and {theta}*{sub e{gamma}} > 10{sup o}. For comparison with the previous experiment the branching ratio with cuts E*{sub {gamma}} > 10 MeV, 0.6 < cos {theta}*{sub e{gamma}} < 0.9 is calculated: R (Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e})) (0.47{+-}0.02(stat.) {+-} 0.03(syst.)) x 10{sup -2}. For the cuts E*{sub {gamma}} > 30 MeV and {theta}*{sub e{gamma}} > 20{sup o}, used in most theoretical papers, Br (3.06 {+-} 0.09(stat.) {+-} 0.14(syst.)) x 10{sup -4}. For the asymmetry we get A{sub {xi}} = -0.015 {+-} 0.021. At present it is the best estimate of this asymmetry.</description><subject>ASYMMETRY</subject><subject>BRANCHING RATIO</subject><subject>COMPARATIVE EVALUATIONS</subject><subject>ELECTRON ANTINEUTRINOS</subject><subject>ELECTRONS</subject><subject>GAMMA RADIATION</subject><subject>KAONS MINUS</subject><subject>MEV RANGE</subject><subject>PARTICLE DECAY</subject><subject>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</subject><subject>PIONS NEUTRAL</subject><issn>1063-7788</issn><issn>1562-692X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqNirsKwjAYRoMoeH0At4CjRP_07iiiKG7WQVwkTVONaFtMipSSd7eK7k7f5RyEhhQmlNrONKTg2b4fBOCDA5Q6DdShrmcRb2YdmnWvMXnzNuoqdYVaCVzooGOoi7jEWYK3lSpyTExVSnGLlalyaT4XGPFDaWFIxB71jLAw1Znd78zgWHBW4qfUF7wJ97v5GCuhi7yPWgm7KTH4Zg-NVsv9Yk0ypeVJcakFv_AsTQXXJ4uC7wYzz_7PegGsoUpm</recordid><startdate>20070415</startdate><enddate>20070415</enddate><creator>Akimenko, S. 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A. ; Konstantinov, A. S. ; Konstantinov, V. F. ; Korolkov, I. Yu ; Laptev, S. V. ; Lebedev, V. A. ; Leontiev, V. M. ; Mazurov, A. E. ; Novikov, V. P. ; Obraztsov, V. F. ; Polyakov, V. A. ; Polyarush, A. Yu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-osti_scitechconnect_210758963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>ASYMMETRY</topic><topic>BRANCHING RATIO</topic><topic>COMPARATIVE EVALUATIONS</topic><topic>ELECTRON ANTINEUTRINOS</topic><topic>ELECTRONS</topic><topic>GAMMA RADIATION</topic><topic>KAONS MINUS</topic><topic>MEV RANGE</topic><topic>PARTICLE DECAY</topic><topic>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</topic><topic>PIONS NEUTRAL</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Akimenko, S. A.</creatorcontrib><creatorcontrib>Bolotov, V. N.</creatorcontrib><creatorcontrib>Britvich, G. 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Yu</creatorcontrib><collection>OSTI.GOV</collection><jtitle>Physics of atomic nuclei</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Akimenko, S. A.</au><au>Bolotov, V. N.</au><au>Britvich, G. I.</au><au>Datsko, K. V.</au><au>Duk, V. A.</au><au>Filin, A. P.</au><au>Gushchin, E. N.</au><au>Inyakin, A. V.</au><au>Khmelnikov, V. A.</au><au>Konstantinov, A. S.</au><au>Konstantinov, V. F.</au><au>Korolkov, I. Yu</au><au>Laptev, S. V.</au><au>Lebedev, V. A.</au><au>Leontiev, V. M.</au><au>Mazurov, A. E.</au><au>Novikov, V. P.</au><au>Obraztsov, V. F.</au><au>Polyakov, V. A.</au><au>Polyarush, A. Yu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Study of K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma} decay with ISTRA+ setup</atitle><jtitle>Physics of atomic nuclei</jtitle><date>2007-04-15</date><risdate>2007</risdate><volume>70</volume><issue>4</issue><issn>1063-7788</issn><eissn>1562-692X</eissn><abstract>Results of study of the K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{gamma} decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be R=(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e})) (1.81{+-}0.03(stat.){+-}0.07(syst.)) x 10{sup -2} for E*{sub {gamma}} > 10 MeV and {theta}*{sub e{gamma}} > 10{sup o}. For comparison with the previous experiment the branching ratio with cuts E*{sub {gamma}} > 10 MeV, 0.6 < cos {theta}*{sub e{gamma}} < 0.9 is calculated: R (Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma}))/(Br(K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e})) (0.47{+-}0.02(stat.) {+-} 0.03(syst.)) x 10{sup -2}. For the cuts E*{sub {gamma}} > 30 MeV and {theta}*{sub e{gamma}} > 20{sup o}, used in most theoretical papers, Br (3.06 {+-} 0.09(stat.) {+-} 0.14(syst.)) x 10{sup -4}. For the asymmetry we get A{sub {xi}} = -0.015 {+-} 0.021. At present it is the best estimate of this asymmetry.</abstract><cop>United States</cop><doi>10.1134/S1063778807040114</doi></addata></record> |
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| subjects | ASYMMETRY BRANCHING RATIO COMPARATIVE EVALUATIONS ELECTRON ANTINEUTRINOS ELECTRONS GAMMA RADIATION KAONS MINUS MEV RANGE PARTICLE DECAY PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PIONS NEUTRAL |
| title | Study of K{sup -}{yields}{pi}{sup 0}e{sup -}{nu}-bar{sub e}{gamma} decay with ISTRA+ setup |
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