Inclusive measurement of the photon energy spectrum in b → sγ decays

P. Koppenburg, K. Abe, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, A. Bay, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang & 146 others Y. Chao, K. F. Chen, B. G. Cheon, Y. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W. S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, T. H. Kim, S. Korpar, P. Križan, P. Krokovny, S. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S. W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, L. E. Piilonen, F. J. Ronga, M. Rozanska, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, O. Schneider, C. Schwanda, A. J. Schwartz, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, M. Watanabe, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, J. Ying, Y. Yusa, C. C. Zhang, Z. P. Zhang, T. Ziegler, D. Žontar

Research output: Contribution to journalArticle

228 Citations (Scopus)

Abstract

A fully inclusive measurement of the flavor changing neutral current decay b → sγ was discussed. The first and second moments of the photon energy spectrum above 1.8 GeV were also measured. It was found that the errors were statistical and systematic in nature. The results show that the moments measurement of the spectrum allows the determination of the b-quark mass and of its motion.

Original languageEnglish
Article number061803
JournalPhysical Review Letters
Volume93
Issue number6
DOIs
Publication statusPublished - Aug 6 2004

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energy spectra
photons
decay
moments
neutral currents
quarks

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Koppenburg, P., Abe, K., Abe, K., Abe, T., Adachi, I., Aihara, H., ... Žontar, D. (2004). Inclusive measurement of the photon energy spectrum in b → sγ decays. Physical Review Letters, 93(6), [061803]. https://doi.org/10.1103/PhysRevLett.93.061803

Inclusive measurement of the photon energy spectrum in b → sγ decays. / Koppenburg, P.; Abe, K.; Abe, K.; Abe, T.; Adachi, I.; Aihara, H.; Akatsu, M.; Asano, Y.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Ban, Y.; Bay, A.; Bitenc, U.; Bizjak, I.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Chang, P.; Chao, Y.; Chen, K. F.; Cheon, B. G.; Choi, Y.; Chuvikov, A.; Cole, S.; Danilov, M.; Dash, M.; Dong, L. Y.; Drutskoy, A.; Eidelman, S.; Eiges, V.; Enari, Y.; Fang, F.; Fratina, S.; Gabyshev, N.; Garmash, A.; Gershon, T.; Gokhroo, G.; Golob, B.; Haba, J.; Hayashii, H.; Hazumi, M.; Higuchi, T.; Hinz, L.; Hokuue, T.; Hoshi, Y.; Hou, W. S.; Hsiung, Y. B.; Iijima, T.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, H.; Iwasaki, M.; Kang, J. H.; Kang, J. S.; Katayama, N.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kim, H. J.; Kim, J. H.; Kim, S. K.; Kim, T. H.; Korpar, S.; Križan, P.; Krokovny, P.; Kumar, S.; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Leder, G.; Lee, S. H.; Lesiak, T.; Li, J.; Limosani, A.; Lin, S. W.; MacNaughton, J.; Majumder, G.; Mandl, F.; Matsumoto, T.; Mikami, Y.; Mitaroff, W.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Mohapatra, D.; Moloney, G. R.; Mori, T.; Nagamine, T.; Nagasaka, Y.; Nakadaira, T.; Nakano, E.; Nakao, M.; Natkaniec, Z.; Neichi, K.; Nishida, S.; Nitoh, O.; Nozaki, T.; Ogawa, S.; Ohshima, T.; Okabe, T.; Okuno, S.; Olsen, S. L.; Ostrowicz, W.; Ozaki, H.; Pakhlov, P.; Palka, H.; Park, C. W.; Park, H.; Parslow, N.; Peak, L. S.; Piilonen, L. E.; Ronga, F. J.; Rozanska, M.; Sagawa, H.; Saitoh, S.; Sakai, Y.; Sarangi, T. R.; Schneider, O.; Schwanda, C.; Schwartz, A. J.; Semenov, S.; Senyo, K.; Seuster, R.; Sevior, M. E.; Shibuya, H.; Soni, N.; Stamen, R.; Stanič, S.; Starič, M.; Sumiyoshi, T.; Suzuki, S.; Tajima, O.; Takasaki, F.; Tamura, N.; Tanaka, M.; Taylor, G. N.; Tomura, T.; Trabelsi, K.; Tsuboyama, T.; Tsukamoto, T.; Uehara, S.; Uglov, T.; Ueno, K.; Uno, S.; Ushiroda, Y.; Varner, G.; Varvell, K. E.; Wang, C. C.; Wang, C. H.; Watanabe, M.; Yabsley, B. D.; Yamada, Y.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Yanai, H.; Yang, Heyoung; Ying, J.; Yusa, Y.; Zhang, C. C.; Zhang, Z. P.; Ziegler, T.; Žontar, D.

In: Physical Review Letters, Vol. 93, No. 6, 061803, 06.08.2004.

Research output: Contribution to journalArticle

Koppenburg, P, Abe, K, Abe, K, Abe, T, Adachi, I, Aihara, H, Akatsu, M, Asano, Y, Aulchenko, V, Aushev, T, Bakich, AM, Ban, Y, Bay, A, Bitenc, U, Bizjak, I, Bondar, A, Bozek, A, Bračko, M, Browder, TE, Chang, P, Chao, Y, Chen, KF, Cheon, BG, Choi, Y, Chuvikov, A, Cole, S, Danilov, M, Dash, M, Dong, LY, Drutskoy, A, Eidelman, S, Eiges, V, Enari, Y, Fang, F, Fratina, S, Gabyshev, N, Garmash, A, Gershon, T, Gokhroo, G, Golob, B, Haba, J, Hayashii, H, Hazumi, M, Higuchi, T, Hinz, L, Hokuue, T, Hoshi, Y, Hou, WS, Hsiung, YB, Iijima, T, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, H, Iwasaki, M, Kang, JH, Kang, JS, Katayama, N, Kawai, H, Kawasaki, T, Kichimi, H, Kim, HJ, Kim, JH, Kim, SK, Kim, TH, Korpar, S, Križan, P, Krokovny, P, Kumar, S, Kuzmin, A, Kwon, YJ, Lange, JS, Leder, G, Lee, SH, Lesiak, T, Li, J, Limosani, A, Lin, SW, MacNaughton, J, Majumder, G, Mandl, F, Matsumoto, T, Mikami, Y, Mitaroff, W, Miyabayashi, K, Miyake, H, Miyata, H, Mohapatra, D, Moloney, GR, Mori, T, Nagamine, T, Nagasaka, Y, Nakadaira, T, Nakano, E, Nakao, M, Natkaniec, Z, Neichi, K, Nishida, S, Nitoh, O, Nozaki, T, Ogawa, S, Ohshima, T, Okabe, T, Okuno, S, Olsen, SL, Ostrowicz, W, Ozaki, H, Pakhlov, P, Palka, H, Park, CW, Park, H, Parslow, N, Peak, LS, Piilonen, LE, Ronga, FJ, Rozanska, M, Sagawa, H, Saitoh, S, Sakai, Y, Sarangi, TR, Schneider, O, Schwanda, C, Schwartz, AJ, Semenov, S, Senyo, K, Seuster, R, Sevior, ME, Shibuya, H, Soni, N, Stamen, R, Stanič, S, Starič, M, Sumiyoshi, T, Suzuki, S, Tajima, O, Takasaki, F, Tamura, N, Tanaka, M, Taylor, GN, Tomura, T, Trabelsi, K, Tsuboyama, T, Tsukamoto, T, Uehara, S, Uglov, T, Ueno, K, Uno, S, Ushiroda, Y, Varner, G, Varvell, KE, Wang, CC, Wang, CH, Watanabe, M, Yabsley, BD, Yamada, Y, Yamaguchi, A, Yamashita, Y, Yamauchi, M, Yanai, H, Yang, H, Ying, J, Yusa, Y, Zhang, CC, Zhang, ZP, Ziegler, T & Žontar, D 2004, 'Inclusive measurement of the photon energy spectrum in b → sγ decays', Physical Review Letters, vol. 93, no. 6, 061803. https://doi.org/10.1103/PhysRevLett.93.061803
Koppenburg, P. ; Abe, K. ; Abe, K. ; Abe, T. ; Adachi, I. ; Aihara, H. ; Akatsu, M. ; Asano, Y. ; Aulchenko, V. ; Aushev, T. ; Bakich, A. M. ; Ban, Y. ; Bay, A. ; Bitenc, U. ; Bizjak, I. ; Bondar, A. ; Bozek, A. ; Bračko, M. ; Browder, T. E. ; Chang, P. ; Chao, Y. ; Chen, K. F. ; Cheon, B. G. ; Choi, Y. ; Chuvikov, A. ; Cole, S. ; Danilov, M. ; Dash, M. ; Dong, L. Y. ; Drutskoy, A. ; Eidelman, S. ; Eiges, V. ; Enari, Y. ; Fang, F. ; Fratina, S. ; Gabyshev, N. ; Garmash, A. ; Gershon, T. ; Gokhroo, G. ; Golob, B. ; Haba, J. ; Hayashii, H. ; Hazumi, M. ; Higuchi, T. ; Hinz, L. ; Hokuue, T. ; Hoshi, Y. ; Hou, W. S. ; Hsiung, Y. B. ; Iijima, T. ; Inami, K. ; Ishikawa, A. ; Itoh, R. ; Iwasaki, H. ; Iwasaki, M. ; Kang, J. H. ; Kang, J. S. ; Katayama, N. ; Kawai, H. ; Kawasaki, T. ; Kichimi, H. ; Kim, H. J. ; Kim, J. H. ; Kim, S. K. ; Kim, T. H. ; Korpar, S. ; Križan, P. ; Krokovny, P. ; Kumar, S. ; Kuzmin, A. ; Kwon, Y. J. ; Lange, J. S. ; Leder, G. ; Lee, S. H. ; Lesiak, T. ; Li, J. ; Limosani, A. ; Lin, S. W. ; MacNaughton, J. ; Majumder, G. ; Mandl, F. ; Matsumoto, T. ; Mikami, Y. ; Mitaroff, W. ; Miyabayashi, K. ; Miyake, H. ; Miyata, H. ; Mohapatra, D. ; Moloney, G. R. ; Mori, T. ; Nagamine, T. ; Nagasaka, Y. ; Nakadaira, T. ; Nakano, E. ; Nakao, M. ; Natkaniec, Z. ; Neichi, K. ; Nishida, S. ; Nitoh, O. ; Nozaki, T. ; Ogawa, S. ; Ohshima, T. ; Okabe, T. ; Okuno, S. ; Olsen, S. L. ; Ostrowicz, W. ; Ozaki, H. ; Pakhlov, P. ; Palka, H. ; Park, C. W. ; Park, H. ; Parslow, N. ; Peak, L. S. ; Piilonen, L. E. ; Ronga, F. J. ; Rozanska, M. ; Sagawa, H. ; Saitoh, S. ; Sakai, Y. ; Sarangi, T. R. ; Schneider, O. ; Schwanda, C. ; Schwartz, A. J. ; Semenov, S. ; Senyo, K. ; Seuster, R. ; Sevior, M. E. ; Shibuya, H. ; Soni, N. ; Stamen, R. ; Stanič, S. ; Starič, M. ; Sumiyoshi, T. ; Suzuki, S. ; Tajima, O. ; Takasaki, F. ; Tamura, N. ; Tanaka, M. ; Taylor, G. N. ; Tomura, T. ; Trabelsi, K. ; Tsuboyama, T. ; Tsukamoto, T. ; Uehara, S. ; Uglov, T. ; Ueno, K. ; Uno, S. ; Ushiroda, Y. ; Varner, G. ; Varvell, K. E. ; Wang, C. C. ; Wang, C. H. ; Watanabe, M. ; Yabsley, B. D. ; Yamada, Y. ; Yamaguchi, A. ; Yamashita, Y. ; Yamauchi, M. ; Yanai, H. ; Yang, Heyoung ; Ying, J. ; Yusa, Y. ; Zhang, C. C. ; Zhang, Z. P. ; Ziegler, T. ; Žontar, D. / Inclusive measurement of the photon energy spectrum in b → sγ decays. In: Physical Review Letters. 2004 ; Vol. 93, No. 6.
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title = "Inclusive measurement of the photon energy spectrum in b → sγ decays",
abstract = "A fully inclusive measurement of the flavor changing neutral current decay b → sγ was discussed. The first and second moments of the photon energy spectrum above 1.8 GeV were also measured. It was found that the errors were statistical and systematic in nature. The results show that the moments measurement of the spectrum allows the determination of the b-quark mass and of its motion.",
author = "P. Koppenburg and K. Abe and K. Abe and T. Abe and I. Adachi and H. Aihara and M. Akatsu and Y. Asano and V. Aulchenko and T. Aushev and Bakich, {A. M.} and Y. Ban and A. Bay and U. Bitenc and I. Bizjak and A. Bondar and A. Bozek and M. Bračko and Browder, {T. E.} and P. Chang and Y. Chao and Chen, {K. F.} and Cheon, {B. G.} and Y. Choi and A. Chuvikov and S. Cole and M. Danilov and M. Dash and Dong, {L. Y.} and A. Drutskoy and S. Eidelman and V. Eiges and Y. Enari and F. Fang and S. Fratina and N. Gabyshev and A. Garmash and T. Gershon and G. Gokhroo and B. Golob and J. Haba and H. Hayashii and M. Hazumi and T. Higuchi and L. Hinz and T. Hokuue and Y. Hoshi and Hou, {W. S.} and Hsiung, {Y. B.} and T. Iijima and K. Inami and A. Ishikawa and R. Itoh and H. Iwasaki and M. Iwasaki and Kang, {J. H.} and Kang, {J. S.} and N. Katayama and H. Kawai and T. Kawasaki and H. Kichimi and Kim, {H. J.} and Kim, {J. H.} and Kim, {S. K.} and Kim, {T. H.} and S. Korpar and P. Križan and P. Krokovny and S. Kumar and A. Kuzmin and Kwon, {Y. J.} and Lange, {J. S.} and G. Leder and Lee, {S. H.} and T. Lesiak and J. Li and A. Limosani and Lin, {S. W.} and J. MacNaughton and G. Majumder and F. Mandl and T. Matsumoto and Y. Mikami and W. Mitaroff and K. Miyabayashi and H. Miyake and H. Miyata and D. Mohapatra and Moloney, {G. R.} and T. Mori and T. Nagamine and Y. Nagasaka and T. Nakadaira and E. Nakano and M. Nakao and Z. Natkaniec and K. Neichi and S. Nishida and O. Nitoh and T. Nozaki and S. Ogawa and T. Ohshima and T. Okabe and S. Okuno and Olsen, {S. L.} and W. Ostrowicz and H. Ozaki and P. Pakhlov and H. Palka and Park, {C. W.} and H. Park and N. Parslow and Peak, {L. S.} and Piilonen, {L. E.} and Ronga, {F. J.} and M. Rozanska and H. Sagawa and S. Saitoh and Y. Sakai and Sarangi, {T. R.} and O. Schneider and C. Schwanda and Schwartz, {A. J.} and S. Semenov and K. Senyo and R. Seuster and Sevior, {M. E.} and H. Shibuya and N. Soni and R. Stamen and S. Stanič and M. Starič and T. Sumiyoshi and S. Suzuki and O. Tajima and F. Takasaki and N. Tamura and M. Tanaka and Taylor, {G. N.} and T. Tomura and K. Trabelsi and T. Tsuboyama and T. Tsukamoto and S. Uehara and T. Uglov and K. Ueno and S. Uno and Y. Ushiroda and G. Varner and Varvell, {K. E.} and Wang, {C. C.} and Wang, {C. H.} and M. Watanabe and Yabsley, {B. D.} and Y. Yamada and A. Yamaguchi and Y. Yamashita and M. Yamauchi and H. Yanai and Heyoung Yang and J. Ying and Y. Yusa and Zhang, {C. C.} and Zhang, {Z. P.} and T. Ziegler and D. Žontar",
year = "2004",
month = "8",
day = "6",
doi = "10.1103/PhysRevLett.93.061803",
language = "English",
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TY - JOUR

T1 - Inclusive measurement of the photon energy spectrum in b → sγ decays

AU - Koppenburg, P.

AU - Abe, K.

AU - Abe, K.

AU - Abe, T.

AU - Adachi, I.

AU - Aihara, H.

AU - Akatsu, M.

AU - Asano, Y.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Ban, Y.

AU - Bay, A.

AU - Bitenc, U.

AU - Bizjak, I.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chang, P.

AU - Chao, Y.

AU - Chen, K. F.

AU - Cheon, B. G.

AU - Choi, Y.

AU - Chuvikov, A.

AU - Cole, S.

AU - Danilov, M.

AU - Dash, M.

AU - Dong, L. Y.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Eiges, V.

AU - Enari, Y.

AU - Fang, F.

AU - Fratina, S.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Gershon, T.

AU - Gokhroo, G.

AU - Golob, B.

AU - Haba, J.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Higuchi, T.

AU - Hinz, L.

AU - Hokuue, T.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hsiung, Y. B.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, H.

AU - Iwasaki, M.

AU - Kang, J. H.

AU - Kang, J. S.

AU - Katayama, N.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Kichimi, H.

AU - Kim, H. J.

AU - Kim, J. H.

AU - Kim, S. K.

AU - Kim, T. H.

AU - Korpar, S.

AU - Križan, P.

AU - Krokovny, P.

AU - Kumar, S.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lange, J. S.

AU - Leder, G.

AU - Lee, S. H.

AU - Lesiak, T.

AU - Li, J.

AU - Limosani, A.

AU - Lin, S. W.

AU - MacNaughton, J.

AU - Majumder, G.

AU - Mandl, F.

AU - Matsumoto, T.

AU - Mikami, Y.

AU - Mitaroff, W.

AU - Miyabayashi, K.

AU - Miyake, H.

AU - Miyata, H.

AU - Mohapatra, D.

AU - Moloney, G. R.

AU - Mori, T.

AU - Nagamine, T.

AU - Nagasaka, Y.

AU - Nakadaira, T.

AU - Nakano, E.

AU - Nakao, M.

AU - Natkaniec, Z.

AU - Neichi, K.

AU - Nishida, S.

AU - Nitoh, O.

AU - Nozaki, T.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okabe, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Ostrowicz, W.

AU - Ozaki, H.

AU - Pakhlov, P.

AU - Palka, H.

AU - Park, C. W.

AU - Park, H.

AU - Parslow, N.

AU - Peak, L. S.

AU - Piilonen, L. E.

AU - Ronga, F. J.

AU - Rozanska, M.

AU - Sagawa, H.

AU - Saitoh, S.

AU - Sakai, Y.

AU - Sarangi, T. R.

AU - Schneider, O.

AU - Schwanda, C.

AU - Schwartz, A. J.

AU - Semenov, S.

AU - Senyo, K.

AU - Seuster, R.

AU - Sevior, M. E.

AU - Shibuya, H.

AU - Soni, N.

AU - Stamen, R.

AU - Stanič, S.

AU - Starič, M.

AU - Sumiyoshi, T.

AU - Suzuki, S.

AU - Tajima, O.

AU - Takasaki, F.

AU - Tamura, N.

AU - Tanaka, M.

AU - Taylor, G. N.

AU - Tomura, T.

AU - Trabelsi, K.

AU - Tsuboyama, T.

AU - Tsukamoto, T.

AU - Uehara, S.

AU - Uglov, T.

AU - Ueno, K.

AU - Uno, S.

AU - Ushiroda, Y.

AU - Varner, G.

AU - Varvell, K. E.

AU - Wang, C. C.

AU - Wang, C. H.

AU - Watanabe, M.

AU - Yabsley, B. D.

AU - Yamada, Y.

AU - Yamaguchi, A.

AU - Yamashita, Y.

AU - Yamauchi, M.

AU - Yanai, H.

AU - Yang, Heyoung

AU - Ying, J.

AU - Yusa, Y.

AU - Zhang, C. C.

AU - Zhang, Z. P.

AU - Ziegler, T.

AU - Žontar, D.

PY - 2004/8/6

Y1 - 2004/8/6

N2 - A fully inclusive measurement of the flavor changing neutral current decay b → sγ was discussed. The first and second moments of the photon energy spectrum above 1.8 GeV were also measured. It was found that the errors were statistical and systematic in nature. The results show that the moments measurement of the spectrum allows the determination of the b-quark mass and of its motion.

AB - A fully inclusive measurement of the flavor changing neutral current decay b → sγ was discussed. The first and second moments of the photon energy spectrum above 1.8 GeV were also measured. It was found that the errors were statistical and systematic in nature. The results show that the moments measurement of the spectrum allows the determination of the b-quark mass and of its motion.

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U2 - 10.1103/PhysRevLett.93.061803

DO - 10.1103/PhysRevLett.93.061803

M3 - Article

VL - 93

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 6

M1 - 061803

ER -