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首页> 外文期刊>Physical review letters >Measurement of the tau Lepton Polarization and R(D*) in the Decay (B)over-bar -> D* tau(-) (v)over-bar(tau)
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Measurement of the tau Lepton Polarization and R(D*) in the Decay (B)over-bar -> D* tau(-) (v)over-bar(tau)

机译:衰减(B)溢出-> D * tau(-)(v)溢出(tau)中tau轻子极化和R(D *)的测量

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摘要

We report the first measurement of the tau lepton polarization P-tau(D*) in the decay (B) over bar -> D* tau(-) (v) over bar (tau) as well as a newmeasurement of the ratio of the branching fractions R(D*) = B((B) over bar -> D* tau(-) (v) over bar (tau)) / B((B) over bar -> D* l(-) (v) over bar (l)), where l(-) denotes an electron or a muon, and the tau is reconstructed in the modes tau(-) -> pi(-) v(tau) and tau(-) -> rho(-) v(tau). We use the full data sample of 772 x 10(6) B (B) over bar pairs recorded with the Belle detector at the (KEKB) over bar electron-positron collider. Our results, P-tau(D*) = -0.38 +/- 0.51 (stat)(-0.16)(+0.21) (syst) and R(D*) = 0.270 +/- 0.035 (stat)(- 0.025)(+0.028) (syst), are consistent with the theoretical predictions of the standard model.
机译:我们报告了在条形图上衰减(B)的tau轻子极化P-tau(D *)的首次测量->在条形图(tau)上的D * tau(-)(v)以及对比率的新测量分支分数R(D *)= B((B)over bar-> D * tau(-)(v)over bar(tau))/ B((B)over bar-> D * l(-)( v)在条(l))上,其中l(-)表示电子或介子,并且tau以tau(-)-> pi(-)v(tau)和tau(-)->的方式重构rho(-)v(tau)。我们使用在棒对-正电子对撞机(KEKB)处的Belle检测器记录的棒对上的完整数据样本772 x 10(6)B(B)。我们的结果P-tau(D *)= -0.38 +/- 0.51(stat)(-0.16)(+ 0.21)(syst)和R(D *)= 0.270 +/- 0.035(stat)(-0.025) (+0.028)(syst)与标准模型的理论预测一致。

著录项

  • 来源
    《Physical review letters 》 |2017年第21期| 211801.1-211801.7| 共7页
  • 作者

    Hirose S.; Iijima T.; Adachi I.; Adamczyk K.; Aihara H.; Al Said S.; Asner D. M.; Atmacan H.; Aulchenko V.; Aushev T.; Ayad R.; Babu V.; Badhrees I.; Bakich A. M.; Bansal V.; Barberio E.; Behera P.; Berger M.; Bhuyan B.; Biswal J.; Bondar A.; Bonvicini G.; Bozek A.; Bracko M.; Browder T. E.; Cervenkov D.; Chang P.; Chen A.; Cheon B. G.; Chilikin K.; Chistov R.; Cho K.; Choi Y.; Cinabro D.; Danilov M.; Dash N.; Di Carlo S.; Dingfelder J.; Dolezal Z.; Drasal Z.; Dutta D.; Eidelman S.; Epifanov D.; Farhat H.; Fast J. E.; Ferber T.; Fulsom B. G.; Gaur V.; Gabyshev N.; Garmash A.; Goldenzweig P.; Golob B.; Greenwald D.; Grygier J.; Haba J.; Hara K.; Hasenbusch J.; Hayasaka K.; Hayashii H.; Higuchi T.; Hou W. -S.; Hsu C. -L.; Inami K.; Inguglia G.; Ishikawa A.; Itoh R.; Iwasaki Y.; Jacobs W. W.; Jaegle I.; Jin Y.; Joffe D.; Joo K. K.; Julius T.; Kato Y.; Kawasaki T.; Kichimi H.; Kiesling C.; Kim D. Y.; Kim J. B.; Kim K. T.; Kim M. J.; Kim S. H.; Kinoshita K.; Kodys P.; Korpar S.; Kotchetkov D.; Krizan P.; Krokovny P.; Kuhr T.; Kulasiri R.; Kumar R.; Kwon Y. -J.; Lange J. S.; Li C. H.; Li L.; Li Y.; Gioi L. Li; Libby J.; Liventsev D.; Lubej M.; Luo T.; MacNaughton J.; Masuda M.; Matsuda T.; Matvienko D.; Miyabayashi K.; Miyake H.; Miyata H.; Mizuk R.; Mohanty G. B.; Moon H. K.; Mori T.; Mussa R.; Nakao M.; Nanut T.; Nath K. J.; Natkaniec Z.; Nayak M.; Niiyama M.; Nisar N. K.; Nishida S.; Ogawa S.; Okuno S.; Ono H.; Onuki Y.; Ostrowicz W.; Pakhlov P.; Pakhlova G.; Pal B.; Park C. W.; Park H.; Paul S.; Pesantez L.; Pestotnik R.; Piilonen L. E.; Prasanth K.; Ritter M.; Rostomyan A.; Rozanska M.; Sakai Y.; Sandilya S.; Santelj L.; Sanuki T.; Sato Y.; Savinov V.; Schlueter T.; Schneider O.; Schnell G.; Schwanda C.; Seino Y.; Senyo K.; Seon O.; Sevior M. E.; Shebalin V.; Shen C. P.; Shibata T. -A.; Shiu J. -G.; Simon F.; Sokolov A.; Solovieva E.; Staric M.; Strube J. F.; Sumisawa K.; Sumiyoshi T.; Takizawa M.; Tamponi U.; Tenchini F.; Trabelsi K.; Uchida M.; Uglov T.; Unno Y.; Uno S.; Urquijo P.; Ushiroda Y.; Usov Y.; Van Hulse C.; Varner G.; Varvell K. E.; Vossen A.; Wang C. H.; Wang M. -Z.; Wang P.; Watanabe M.; Watanabe Y.; Widmann E.; Won E.; Yamashita Y.; Ye H.; Yelton J.; Yuan C. Z.; Zhang Z. P.; Zhilich V.; Zhulanov V.; Zupanc A.;

  • 作者单位

    Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan;

    Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan|Nagoya Univ, Kobayashi Maskawa Inst, Nagoya, Aichi 4648602, Japan;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland;

    Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;

    King Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia|Univ Tabuk, Fac Sci, Dept Phys, Tabuk 71451, Saudi Arabia;

    Pacific Northwest Natl Lab, Richland, WA 99352 USA;

    Middle East Tech Univ, TR-06531 Ankara, Turkey;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Moscow Inst Phys & Technol, Moscow 141700, Russia;

    Univ Tabuk, Fac Sci, Dept Phys, Tabuk 71451, Saudi Arabia;

    Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India;

    King Abdulaziz City Sci & Technol, Riyadh 11442, Saudi Arabia|Univ Tabuk, Fac Sci, Dept Phys, Tabuk 71451, Saudi Arabia;

    Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia;

    Pacific Northwest Natl Lab, Richland, WA 99352 USA;

    Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia;

    IIT, Madras 600036, Tamil Nadu, India;

    Stefan Meyer Inst Subat Phys, A-1090 Vienna, Austria;

    IIT, Gauhati 781039, Assam, India;

    J Stefan Inst, Ljubljana 1000, Slovenia;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Wayne State Univ, Detroit, MI 48202 USA;

    H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland;

    J Stefan Inst, Ljubljana 1000, Slovenia|Univ Maribor, Maribor 2000, Slovenia;

    Univ Hawaii, Honolulu, HI 96822 USA;

    Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic;

    Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan;

    Natl Cent Univ, Chungli 32054, Taiwan;

    Hanyang Univ, Seoul 133791, South Korea;

    Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia|Moscow Phys Engn Inst, Moscow 115409, Russia;

    Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia|Moscow Phys Engn Inst, Moscow 115409, Russia;

    Korea Inst Sci & Technol Informat, Daejeon 305806, South Korea;

    Sungkyunkwan Univ, Suwon 440746, South Korea;

    Wayne State Univ, Detroit, MI 48202 USA;

    Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia|Moscow Phys Engn Inst, Moscow 115409, Russia;

    IIT, Bhubaneswar 751007, Orissa, India;

    Wayne State Univ, Detroit, MI 48202 USA;

    Univ Bonn, D-53115 Bonn, Germany;

    Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic;

    Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic;

    Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Wayne State Univ, Detroit, MI 48202 USA;

    Pacific Northwest Natl Lab, Richland, WA 99352 USA;

    Deutsches Elektronen Synchrotron, D-22607 Hamburg, Germany;

    Pacific Northwest Natl Lab, Richland, WA 99352 USA;

    Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Karlsruhe Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany;

    J Stefan Inst, Ljubljana 1000, Slovenia|Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia;

    Tech Univ Munich, Dept Phys, D-85748 Garching, Germany;

    Karlsruhe Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Univ Bonn, D-53115 Bonn, Germany;

    Niigata Univ, Niigata 9502181, Japan;

    Nara Womens Univ, Nara 6308506, Japan;

    Univ Tokyo, Kavli Inst Phys & Math Univ WPI, Kashiwa, Chiba 2778583, Japan;

    Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan;

    Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia;

    Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan;

    Deutsches Elektronen Synchrotron, D-22607 Hamburg, Germany;

    Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Indiana Univ, Bloomington, IN 47408 USA;

    Univ Florida, Gainesville, FL 32611 USA;

    Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;

    Kennesaw State Univ, Kennesaw 30144, Rep of Georgia;

    Chonnam Natl Univ, Kwangju 660701, South Korea;

    Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia;

    Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan;

    Niigata Univ, Niigata 9502181, Japan;

    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany;

    Hanyang Univ, Seoul 133791, South Korea|Soongsil Univ, Seoul 156743, South Korea;

    Korea Univ, Seoul 136713, South Korea;

    Korea Univ, Seoul 136713, South Korea;

    Kyungpook Natl Univ, Daegu 702701, South Korea;

    Univ Cincinnati, Cincinnati, OH 45221 USA;

    Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic;

    J Stefan Inst, Ljubljana 1000, Slovenia|Univ Maribor, Maribor 2000, Slovenia;

    Univ Hawaii, Honolulu, HI 96822 USA;

    J Stefan Inst, Ljubljana 1000, Slovenia|Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany;

    Kennesaw State Univ, Kennesaw 30144, Rep of Georgia;

    Punjab Agr Univ, Ludhiana 141004, Punjab, India;

    Yonsei Univ, Seoul 120749, South Korea;

    Justus Liebig Univ Giessen, D-35392 Giessen, Germany;

    Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia;

    Univ Sci & Technol China, Hefei 230026, Peoples R China;

    Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA;

    Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany;

    IIT, Madras 600036, Tamil Nadu, India;

    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan|Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA;

    J Stefan Inst, Ljubljana 1000, Slovenia;

    Univ Pittsburgh, Pittsburgh, PA 15260 USA;

    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Univ Tokyo, Earthquake Res Inst, Tokyo 1130032, Japan;

    Miyazaki Univ, Miyazaki 8892192, Japan;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Nara Womens Univ, Nara 6308506, Japan;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Niigata Univ, Niigata 9502181, Japan;

    Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia|Moscow Phys Engn Inst, Moscow 115409, Russia|Moscow Inst Phys & Technol, Moscow 141700, Russia;

    Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India;

    Korea Univ, Seoul 136713, South Korea;

    Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan;

    Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    J Stefan Inst, Ljubljana 1000, Slovenia;

    IIT, Gauhati 781039, Assam, India;

    H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland;

    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan|Wayne State Univ, Detroit, MI 48202 USA;

    Kyoto Univ, Kyoto 6068502, Japan;

    Univ Pittsburgh, Pittsburgh, PA 15260 USA;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Toho Univ, Funabashi, Chiba 2748510, Japan;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|Kanagawa Univ, Yokohama, Kanagawa 2218686, Japan;

    Nippon Dent Univ, Niigata 9518580, Japan|Niigata Univ, Niigata 9502181, Japan;

    Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;

    H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland;

    Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia|Moscow Phys Engn Inst, Moscow 115409, Russia;

    Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia|Moscow Inst Phys & Technol, Moscow 141700, Russia;

    Univ Cincinnati, Cincinnati, OH 45221 USA;

    Sungkyunkwan Univ, Suwon 440746, South Korea;

    Kyungpook Natl Univ, Daegu 702701, South Korea;

    Tech Univ Munich, Dept Phys, D-85748 Garching, Germany;

    Univ Bonn, D-53115 Bonn, Germany;

    J Stefan Inst, Ljubljana 1000, Slovenia;

    IIT, Madras 600036, Tamil Nadu, India;

    Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany;

    Deutsches Elektronen Synchrotron, D-22607 Hamburg, Germany;

    H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Univ Cincinnati, Cincinnati, OH 45221 USA;

    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan;

    Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan;

    Univ Pittsburgh, Pittsburgh, PA 15260 USA;

    Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany;

    Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland;

    Univ Basque Country, UPV EHU, E-48080 Bilbao, Spain|Basque Fdn Sci, Ikerbasque, Bilbao 48013, Spain;

    Inst High Energy Phys, A-1050 Vienna, Austria;

    Niigata Univ, Niigata 9502181, Japan;

    Yamagata Univ, Yamagata 9908560, Japan;

    Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan;

    Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Beihang Univ, Beijing 100191, Peoples R China;

    Tokyo Inst Technol, Tokyo 1528550, Japan;

    Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan;

    Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany|Tech Univ Munich, Excellence Cluster Universe, D-85748 Garching, Germany;

    Inst High Energy Phys, Protvino 142281, Russia;

    Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia|Moscow Inst Phys & Technol, Moscow 141700, Russia;

    J Stefan Inst, Ljubljana 1000, Slovenia;

    Pacific Northwest Natl Lab, Richland, WA 99352 USA;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Tokyo Metropolitan Univ, Tokyo 1920397, Japan;

    High Energy Accelerator Res Org KEK, KEK Theory Ctr, J PARC Branch, Tsukuba, Ibaraki 3050801, Japan|RIKEN, Nishina Ctr, Theoret Res Div, Saitama 3510198, Japan|Showa Pharmaceut Univ, Tokyo 1948543, Japan;

    Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy|Univ Turin, I-10124 Turin, Italy;

    Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Tokyo Inst Technol, Tokyo 1528550, Japan;

    Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia|Moscow Inst Phys & Technol, Moscow 141700, Russia;

    Hanyang Univ, Seoul 133791, South Korea;

    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia;

    Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan|High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Univ Basque Country, UPV EHU, E-48080 Bilbao, Spain;

    Univ Hawaii, Honolulu, HI 96822 USA;

    Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia;

    Indiana Univ, Bloomington, IN 47408 USA;

    Natl United Univ, Miaoli 36003, Taiwan;

    Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan;

    Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China;

    Niigata Univ, Niigata 9502181, Japan;

    Kanagawa Univ, Yokohama, Kanagawa 2218686, Japan;

    Stefan Meyer Inst Subat Phys, A-1090 Vienna, Austria;

    Korea Univ, Seoul 136713, South Korea;

    Nippon Dent Univ, Niigata 9518580, Japan;

    Deutsches Elektronen Synchrotron, D-22607 Hamburg, Germany;

    Univ Florida, Gainesville, FL 32611 USA;

    Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China;

    Univ Sci & Technol China, Hefei 230026, Peoples R China;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia|Novosibirsk State Univ, Novosibirsk 630090, Russia;

    J Stefan Inst, Ljubljana 1000, Slovenia|Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia;

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