Observation of a J(PC)=1(-+) Exotic Resonance in Diffractive Dissociation of 190 GeV/c pi(-) into pi(-)pi(-)pi(+) RID D-4627-2011

MG Alekseev; VY Alexakhin; Y Alexandrov; GD Alexeev; A Amoroso; A Austregesilo; B Badelek; F Balestra; J Ball; J Barth; G Baum; Y Bedfer; J Bernhard; R Bertini; M Bettinelli; R Birsa; J Bisplinghoff; P Bordalo; F Bradamante; A Bravar; A Bressan; G Brona; E Burtin; MP Bussa; A Chapiro; M Chiosso; SU Chung; A Cicuttin; M Colantoni; ML Crespo; Torre S Dalla; T Dafni; S Das; SS Dasgupta; OY Denisov; L Dhara; V Diaz; AM Dinkelbach; SV Donskov; N Doshita; V Duic; W Dunnweber; A Efremov; Alaoui A El; PD Eversheim; W Eyrich; M Faessler; A Ferrero; M Finger; M Finger; H Fischer; C Franco; JM Friedrich; R Garfagnini; F Gautheron; OP Gavrichtchouk; R Gazda; S Gerassimov; R Geyer; M Giorgi; B Gobbo; S Goertz; S Grabmuller; OA Grajek; A Grasso; B Grube; R Gushterski; A Guskov; F Haas; Harrach D von; T Hasegawa; J Heckmann; FH Heinsius; R Hermann; F Herrmann; C Hess; F Hinterberger; N Horikawa; C Hoppner; N d'Hose; C Ilgner; S Ishimoto; O Ivanov; Y Ivanshin; T Iwata; R Jahn; P Jasinski; G Jegou; R Joosten; E Kabuss; D Kang; B Ketzer; GV Khaustov; YA Khokhlov; Y Kisselev; F Klein; K Klimaszewski; S Koblitz; JH Koivuniemi; VN Kolosov; EV Komissarov; K Kondo; K Konigsmann; R Konopka; I Konorov; VF Konstantinov; A Korzenev; AM Kotzinian; O Kouznetsov; K Kowalik; M Kramer; A Kral; ZV Kroumchtein; R Kuhn; F Kunne; K Kurek; L Lauser; Goff JM Le; AA Lednev; A Lehmann; S Levorato; J Lichtenstadt; T Liska; A Maggiora; M Maggiora; A Magnon; GK Mallot; A Mann; C Marchand; J Marroncle; A Martin; J Marzec; F Massmann; T Matsuda; AN Maximov; W Meyer; T Michigami; YV Mikhailov; MA Moinester; A Mutter; A Nagaytsev; T Nagel; J Nassalski; T Negrini; F Nerling; S Neubert; D Neyret; VI Nikolaenko; AG Olshevsky; M Ostrick; A Padee; R Panknin; Daniele PANZIERI; B Parsamyan; S Paul; Kaminska B Pawlukiewicz; E Perevalova; G Pesaro; DV Peshekhonov; G Piragino; S Platchkov; J Pochodzalla; J Polak; VA Polyakov; G Pontecorvo; J Pretz; C Quintans; JF Rajotte; S Ramos; V Rapatsky; G Reicherz; D Reggiani; A Richter; F Robinet; E Rocco; E Rondio; DI Ryabchikov; VD Samoylenko; A Sandacz; H Santos; MG Sapozhnikov; S Sarkar; IA Savin; G Sbrizzai; P Schiavon; C Schill; T Schluter; L Schmitt; S Schopferer; W Schroder; OY Shevchenko; HW Siebert; L Silva; L Sinha; AN Sissakian; M Slunecka; GI Smirnov; S Sosio; F Sozzi; A Srnka; M Stolarski; M Sulc; R Sulej; S Takekawa; S Tessaro; F Tessarotto; A Teufel; LG Tkatchev; S Uhl; I Uman; G Venugopal; M Virius; NV Vlassov; A Vossen; Q Weitzel; R Windmolders; W Wislicki; H Wollny; K Zaremba; M Zavertyaev; E Zemlyanichkina; M Ziembicki; J Zhao; N Zhuravlev; A. Zvyagin

doi:10.1103/PhysRevLett.104.241803

Observation of a J(PC)=1(-+) Exotic Resonance in Diffractive Dissociation of 190 GeV/c pi(-) into pi(-)pi(-)pi(+) RID D-4627-2011

MG Alekseev, VY Alexakhin, Y Alexandrov, GD Alexeev, A Amoroso, A Austregesilo, B Badelek, F Balestra, J Ball, J Barth, G Baum, Y Bedfer, J Bernhard, R Bertini, M Bettinelli, R Birsa, J Bisplinghoff, P Bordalo, F Bradamante, A BravarA Bressan, G Brona, E Burtin, MP Bussa, A Chapiro, M Chiosso, SU Chung, A Cicuttin, M Colantoni, ML Crespo, Torre S Dalla, T Dafni, S Das, SS Dasgupta, OY Denisov, L Dhara, V Diaz, AM Dinkelbach, SV Donskov, N Doshita, V Duic, W Dunnweber, A Efremov, Alaoui A El, PD Eversheim, W Eyrich, M Faessler, A Ferrero, M Finger, M Finger, H Fischer, C Franco, JM Friedrich, R Garfagnini, F Gautheron, OP Gavrichtchouk, R Gazda, S Gerassimov, R Geyer, M Giorgi, B Gobbo, S Goertz, S Grabmuller, OA Grajek, A Grasso, B Grube, R Gushterski, A Guskov, F Haas, Harrach D von, T Hasegawa, J Heckmann, FH Heinsius, R Hermann, F Herrmann, C Hess, F Hinterberger, N Horikawa, C Hoppner, N d'Hose, C Ilgner, S Ishimoto, O Ivanov, Y Ivanshin, T Iwata, R Jahn, P Jasinski, G Jegou, R Joosten, E Kabuss, D Kang, B Ketzer, GV Khaustov, YA Khokhlov, Y Kisselev, F Klein, K Klimaszewski, S Koblitz, JH Koivuniemi, VN Kolosov, EV Komissarov, K Kondo, K Konigsmann, R Konopka, I Konorov, VF Konstantinov, A Korzenev, AM Kotzinian, O Kouznetsov, K Kowalik, M Kramer, A Kral, ZV Kroumchtein, R Kuhn, F Kunne, K Kurek, L Lauser, Goff JM Le, AA Lednev, A Lehmann, S Levorato, J Lichtenstadt, T Liska, A Maggiora, M Maggiora, A Magnon, GK Mallot, A Mann, C Marchand, J Marroncle, A Martin, J Marzec, F Massmann, T Matsuda, AN Maximov, W Meyer, T Michigami, YV Mikhailov, MA Moinester, A Mutter, A Nagaytsev, T Nagel, J Nassalski, T Negrini, F Nerling, S Neubert, D Neyret, VI Nikolaenko, AG Olshevsky, M Ostrick, A Padee, R Panknin, Daniele PANZIERI, B Parsamyan, S Paul, Kaminska B Pawlukiewicz, E Perevalova, G Pesaro, DV Peshekhonov, G Piragino, S Platchkov, J Pochodzalla, J Polak, VA Polyakov, G Pontecorvo, J Pretz, C Quintans, JF Rajotte, S Ramos, V Rapatsky, G Reicherz, D Reggiani, A Richter, F Robinet, E Rocco, E Rondio, DI Ryabchikov, VD Samoylenko, A Sandacz, H Santos, MG Sapozhnikov, S Sarkar, IA Savin, G Sbrizzai, P Schiavon, C Schill, T Schluter, L Schmitt, S Schopferer, W Schroder, OY Shevchenko, HW Siebert, L Silva, L Sinha, AN Sissakian, M Slunecka, GI Smirnov, S Sosio, F Sozzi, A Srnka, M Stolarski, M Sulc, R Sulej, S Takekawa, S Tessaro, F Tessarotto, A Teufel, LG Tkatchev, S Uhl, I Uman, G Venugopal, M Virius, NV Vlassov, A Vossen, Q Weitzel, R Windmolders, W Wislicki, H Wollny, K Zaremba, M Zavertyaev, E Zemlyanichkina, M Ziembicki, J Zhao, N Zhuravlev, A. Zvyagin

Dipartimento di Scienze e Innovazione Tecnologica

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π−π−π+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420 000 events taken at values of the squared 4-momentum transfer t′ between 0.1 and 1 GeV2/c2. The well-known resonances a1(1260), a2(1320), and π2(1670) are clearly observed. In addition, the data show a significant natural-parity exchange production of a resonance with spin-exotic quantum numbers JPC=1−+ at 1.66 GeV/c2 decaying to ρπ. The resonant nature of this wave is evident from the mass-dependent phase differences to the JPC=2−+ and 1++ waves. From a mass-dependent fit a resonance mass of (1660±10+0−64) MeV/c2 and a width of (269±21+42−64) MeV/c2 are deduced, with an intensity of (1.7±0.2)% of the total intensity.

Lingua originale	Inglese
Rivista	Physical Review Letters
Volume	104
Numero di pubblicazione	24
DOI	https://doi.org/10.1103/PhysRevLett.104.241803
Stato di pubblicazione	Pubblicato - 1 gen 2010

Keywords

COMPASS
RICH

Accesso al documento

10.1103/PhysRevLett.104.241803

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handle

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Alekseev, MG., Alexakhin, VY., Alexandrov, Y., Alexeev, GD., Amoroso, A., Austregesilo, A., Badelek, B., Balestra, F., Ball, J., Barth, J., Baum, G., Bedfer, Y., Bernhard, J., Bertini, R., Bettinelli, M., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., ... Zvyagin, A. (2010). Observation of a J(PC)=1(-+) Exotic Resonance in Diffractive Dissociation of 190 GeV/c pi(-) into pi(-)pi(-)pi(+) RID D-4627-2011. Physical Review Letters, 104(24). https://doi.org/10.1103/PhysRevLett.104.241803

@article{6e06a88c3fdf4415843c7302e7399dbb,

title = "Observation of a J(PC)=1(-+) Exotic Resonance in Diffractive Dissociation of 190 GeV/c pi(-) into pi(-)pi(-)pi(+) RID D-4627-2011",

abstract = "The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π−π−π+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420 000 events taken at values of the squared 4-momentum transfer t′ between 0.1 and 1 GeV2/c2. The well-known resonances a1(1260), a2(1320), and π2(1670) are clearly observed. In addition, the data show a significant natural-parity exchange production of a resonance with spin-exotic quantum numbers JPC=1−+ at 1.66 GeV/c2 decaying to ρπ. The resonant nature of this wave is evident from the mass-dependent phase differences to the JPC=2−+ and 1++ waves. From a mass-dependent fit a resonance mass of (1660±10+0−64) MeV/c2 and a width of (269±21+42−64) MeV/c2 are deduced, with an intensity of (1.7±0.2)% of the total intensity.",

keywords = "COMPASS, RICH, COMPASS, RICH",

author = "MG Alekseev and VY Alexakhin and Y Alexandrov and GD Alexeev and A Amoroso and A Austregesilo and B Badelek and F Balestra and J Ball and J Barth and G Baum and Y Bedfer and J Bernhard and R Bertini and M Bettinelli and R Birsa and J Bisplinghoff and P Bordalo and F Bradamante and A Bravar and A Bressan and G Brona and E Burtin and MP Bussa and A Chapiro and M Chiosso and SU Chung and A Cicuttin and M Colantoni and ML Crespo and Dalla, {Torre S} and T Dafni and S Das and SS Dasgupta and OY Denisov and L Dhara and V Diaz and AM Dinkelbach and SV Donskov and N Doshita and V Duic and W Dunnweber and A Efremov and El, {Alaoui A} and PD Eversheim and W Eyrich and M Faessler and A Ferrero and M Finger and M Finger and H Fischer and C Franco and JM Friedrich and R Garfagnini and F Gautheron and OP Gavrichtchouk and R Gazda and S Gerassimov and R Geyer and M Giorgi and B Gobbo and S Goertz and S Grabmuller and OA Grajek and A Grasso and B Grube and R Gushterski and A Guskov and F Haas and von, {Harrach D} and T Hasegawa and J Heckmann and FH Heinsius and R Hermann and F Herrmann and C Hess and F Hinterberger and N Horikawa and C Hoppner and N d'Hose and C Ilgner and S Ishimoto and O Ivanov and Y Ivanshin and T Iwata and R Jahn and P Jasinski and G Jegou and R Joosten and E Kabuss and D Kang and B Ketzer and GV Khaustov and YA Khokhlov and Y Kisselev and F Klein and K Klimaszewski and S Koblitz and JH Koivuniemi and VN Kolosov and EV Komissarov and K Kondo and K Konigsmann and R Konopka and I Konorov and VF Konstantinov and A Korzenev and AM Kotzinian and O Kouznetsov and K Kowalik and M Kramer and A Kral and ZV Kroumchtein and R Kuhn and F Kunne and K Kurek and L Lauser and Le, {Goff JM} and AA Lednev and A Lehmann and S Levorato and J Lichtenstadt and T Liska and A Maggiora and M Maggiora and A Magnon and GK Mallot and A Mann and C Marchand and J Marroncle and A Martin and J Marzec and F Massmann and T Matsuda and AN Maximov and W Meyer and T Michigami and YV Mikhailov and MA Moinester and A Mutter and A Nagaytsev and T Nagel and J Nassalski and T Negrini and F Nerling and S Neubert and D Neyret and VI Nikolaenko and AG Olshevsky and M Ostrick and A Padee and R Panknin and Daniele PANZIERI and B Parsamyan and S Paul and Pawlukiewicz, {Kaminska B} and E Perevalova and G Pesaro and DV Peshekhonov and G Piragino and S Platchkov and J Pochodzalla and J Polak and VA Polyakov and G Pontecorvo and J Pretz and C Quintans and JF Rajotte and S Ramos and V Rapatsky and G Reicherz and D Reggiani and A Richter and F Robinet and E Rocco and E Rondio and DI Ryabchikov and VD Samoylenko and A Sandacz and H Santos and MG Sapozhnikov and S Sarkar and IA Savin and G Sbrizzai and P Schiavon and C Schill and T Schluter and L Schmitt and S Schopferer and W Schroder and OY Shevchenko and HW Siebert and L Silva and L Sinha and AN Sissakian and M Slunecka and GI Smirnov and S Sosio and F Sozzi and A Srnka and M Stolarski and M Sulc and R Sulej and S Takekawa and S Tessaro and F Tessarotto and A Teufel and LG Tkatchev and S Uhl and I Uman and G Venugopal and M Virius and NV Vlassov and A Vossen and Q Weitzel and R Windmolders and W Wislicki and H Wollny and K Zaremba and M Zavertyaev and E Zemlyanichkina and M Ziembicki and J Zhao and N Zhuravlev and A. Zvyagin",

year = "2010",

month = jan,

day = "1",

doi = "10.1103/PhysRevLett.104.241803",

language = "English",

volume = "104",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "24",

}

Alekseev, MG, Alexakhin, VY, Alexandrov, Y, Alexeev, GD, Amoroso, A, Austregesilo, A, Badelek, B, Balestra, F, Ball, J, Barth, J, Baum, G, Bedfer, Y, Bernhard, J, Bertini, R, Bettinelli, M, Birsa, R, Bisplinghoff, J, Bordalo, P, Bradamante, F, Bravar, A, Bressan, A, Brona, G, Burtin, E, Bussa, MP, Chapiro, A, Chiosso, M, Chung, SU, Cicuttin, A, Colantoni, M, Crespo, ML, Dalla, TS, Dafni, T, Das, S, Dasgupta, SS, Denisov, OY, Dhara, L, Diaz, V, Dinkelbach, AM, Donskov, SV, Doshita, N, Duic, V, Dunnweber, W, Efremov, A, El, AA, Eversheim, PD, Eyrich, W, Faessler, M, Ferrero, A, Finger, M, Finger, M, Fischer, H, Franco, C, Friedrich, JM, Garfagnini, R, Gautheron, F, Gavrichtchouk, OP, Gazda, R, Gerassimov, S, Geyer, R, Giorgi, M, Gobbo, B, Goertz, S, Grabmuller, S, Grajek, OA, Grasso, A, Grube, B, Gushterski, R, Guskov, A, Haas, F, von, HD, Hasegawa, T, Heckmann, J, Heinsius, FH, Hermann, R, Herrmann, F, Hess, C, Hinterberger, F, Horikawa, N, Hoppner, C, d'Hose, N, Ilgner, C, Ishimoto, S, Ivanov, O, Ivanshin, Y, Iwata, T, Jahn, R, Jasinski, P, Jegou, G, Joosten, R, Kabuss, E, Kang, D, Ketzer, B, Khaustov, GV, Khokhlov, YA, Kisselev, Y, Klein, F, Klimaszewski, K, Koblitz, S, Koivuniemi, JH, Kolosov, VN, Komissarov, EV, Kondo, K, Konigsmann, K, Konopka, R, Konorov, I, Konstantinov, VF, Korzenev, A, Kotzinian, AM, Kouznetsov, O, Kowalik, K, Kramer, M, Kral, A, Kroumchtein, ZV, Kuhn, R, Kunne, F, Kurek, K, Lauser, L, Le, GJM, Lednev, AA, Lehmann, A, Levorato, S, Lichtenstadt, J, Liska, T, Maggiora, A, Maggiora, M, Magnon, A, Mallot, GK, Mann, A, Marchand, C, Marroncle, J, Martin, A, Marzec, J, Massmann, F, Matsuda, T, Maximov, AN, Meyer, W, Michigami, T, Mikhailov, YV, Moinester, MA, Mutter, A, Nagaytsev, A, Nagel, T, Nassalski, J, Negrini, T, Nerling, F, Neubert, S, Neyret, D, Nikolaenko, VI, Olshevsky, AG, Ostrick, M, Padee, A, Panknin, R, PANZIERI, D, Parsamyan, B, Paul, S, Pawlukiewicz, KB, Perevalova, E, Pesaro, G, Peshekhonov, DV, Piragino, G, Platchkov, S, Pochodzalla, J, Polak, J, Polyakov, VA, Pontecorvo, G, Pretz, J, Quintans, C, Rajotte, JF, Ramos, S, Rapatsky, V, Reicherz, G, Reggiani, D, Richter, A, Robinet, F, Rocco, E, Rondio, E, Ryabchikov, DI, Samoylenko, VD, Sandacz, A, Santos, H, Sapozhnikov, MG, Sarkar, S, Savin, IA, Sbrizzai, G, Schiavon, P, Schill, C, Schluter, T, Schmitt, L, Schopferer, S, Schroder, W, Shevchenko, OY, Siebert, HW, Silva, L, Sinha, L, Sissakian, AN, Slunecka, M, Smirnov, GI, Sosio, S, Sozzi, F, Srnka, A, Stolarski, M, Sulc, M, Sulej, R, Takekawa, S, Tessaro, S, Tessarotto, F, Teufel, A, Tkatchev, LG, Uhl, S, Uman, I, Venugopal, G, Virius, M, Vlassov, NV, Vossen, A, Weitzel, Q, Windmolders, R, Wislicki, W, Wollny, H, Zaremba, K, Zavertyaev, M, Zemlyanichkina, E, Ziembicki, M, Zhao, J, Zhuravlev, N & Zvyagin, A 2010, 'Observation of a J(PC)=1(-+) Exotic Resonance in Diffractive Dissociation of 190 GeV/c pi(-) into pi(-)pi(-)pi(+) RID D-4627-2011', Physical Review Letters, vol. 104, n. 24. https://doi.org/10.1103/PhysRevLett.104.241803

TY - JOUR

T1 - Observation of a J(PC)=1(-+) Exotic Resonance in Diffractive Dissociation of 190 GeV/c pi(-) into pi(-)pi(-)pi(+) RID D-4627-2011

AU - Alekseev, MG

AU - Alexakhin, VY

AU - Alexandrov, Y

AU - Alexeev, GD

AU - Amoroso, A

AU - Austregesilo, A

AU - Badelek, B

AU - Balestra, F

AU - Ball, J

AU - Barth, J

AU - Baum, G

AU - Bedfer, Y

AU - Bernhard, J

AU - Bertini, R

AU - Bettinelli, M

AU - Birsa, R

AU - Bisplinghoff, J

AU - Bordalo, P

AU - Bradamante, F

AU - Bravar, A

AU - Bressan, A

AU - Brona, G

AU - Burtin, E

AU - Bussa, MP

AU - Chapiro, A

AU - Chiosso, M

AU - Chung, SU

AU - Cicuttin, A

AU - Colantoni, M

AU - Crespo, ML

AU - Dalla, Torre S

AU - Dafni, T

AU - Das, S

AU - Dasgupta, SS

AU - Denisov, OY

AU - Dhara, L

AU - Diaz, V

AU - Dinkelbach, AM

AU - Donskov, SV

AU - Doshita, N

AU - Duic, V

AU - Dunnweber, W

AU - Efremov, A

AU - El, Alaoui A

AU - Eversheim, PD

AU - Eyrich, W

AU - Faessler, M

AU - Ferrero, A

AU - Finger, M

AU - Fischer, H

AU - Franco, C

AU - Friedrich, JM

AU - Garfagnini, R

AU - Gautheron, F

AU - Gavrichtchouk, OP

AU - Gazda, R

AU - Gerassimov, S

AU - Geyer, R

AU - Giorgi, M

AU - Gobbo, B

AU - Goertz, S

AU - Grabmuller, S

AU - Grajek, OA

AU - Grasso, A

AU - Grube, B

AU - Gushterski, R

AU - Guskov, A

AU - Haas, F

AU - von, Harrach D

AU - Hasegawa, T

AU - Heckmann, J

AU - Heinsius, FH

AU - Hermann, R

AU - Herrmann, F

AU - Hess, C

AU - Hinterberger, F

AU - Horikawa, N

AU - Hoppner, C

AU - d'Hose, N

AU - Ilgner, C

AU - Ishimoto, S

AU - Ivanov, O

AU - Ivanshin, Y

AU - Iwata, T

AU - Jahn, R

AU - Jasinski, P

AU - Jegou, G

AU - Joosten, R

AU - Kabuss, E

AU - Kang, D

AU - Ketzer, B

AU - Khaustov, GV

AU - Khokhlov, YA

AU - Kisselev, Y

AU - Klein, F

AU - Klimaszewski, K

AU - Koblitz, S

AU - Koivuniemi, JH

AU - Kolosov, VN

AU - Komissarov, EV

AU - Kondo, K

AU - Konigsmann, K

AU - Konopka, R

AU - Konorov, I

AU - Konstantinov, VF

AU - Korzenev, A

AU - Kotzinian, AM

AU - Kouznetsov, O

AU - Kowalik, K

AU - Kramer, M

AU - Kral, A

AU - Kroumchtein, ZV

AU - Kuhn, R

AU - Kunne, F

AU - Kurek, K

AU - Lauser, L

AU - Le, Goff JM

AU - Lednev, AA

AU - Lehmann, A

AU - Levorato, S

AU - Lichtenstadt, J

AU - Liska, T

AU - Maggiora, A

AU - Maggiora, M

AU - Magnon, A

AU - Mallot, GK

AU - Mann, A

AU - Marchand, C

AU - Marroncle, J

AU - Martin, A

AU - Marzec, J

AU - Massmann, F

AU - Matsuda, T

AU - Maximov, AN

AU - Meyer, W

AU - Michigami, T

AU - Mikhailov, YV

AU - Moinester, MA

AU - Mutter, A

AU - Nagaytsev, A

AU - Nagel, T

AU - Nassalski, J

AU - Negrini, T

AU - Nerling, F

AU - Neubert, S

AU - Neyret, D

AU - Nikolaenko, VI

AU - Olshevsky, AG

AU - Ostrick, M

AU - Padee, A

AU - Panknin, R

AU - PANZIERI, Daniele

AU - Parsamyan, B

AU - Paul, S

AU - Pawlukiewicz, Kaminska B

AU - Perevalova, E

AU - Pesaro, G

AU - Peshekhonov, DV

AU - Piragino, G

AU - Platchkov, S

AU - Pochodzalla, J

AU - Polak, J

AU - Polyakov, VA

AU - Pontecorvo, G

AU - Pretz, J

AU - Quintans, C

AU - Rajotte, JF

AU - Ramos, S

AU - Rapatsky, V

AU - Reicherz, G

AU - Reggiani, D

AU - Richter, A

AU - Robinet, F

AU - Rocco, E

AU - Rondio, E

AU - Ryabchikov, DI

AU - Samoylenko, VD

AU - Sandacz, A

AU - Santos, H

AU - Sapozhnikov, MG

AU - Sarkar, S

AU - Savin, IA

AU - Sbrizzai, G

AU - Schiavon, P

AU - Schill, C

AU - Schluter, T

AU - Schmitt, L

AU - Schopferer, S

AU - Schroder, W

AU - Shevchenko, OY

AU - Siebert, HW

AU - Silva, L

AU - Sinha, L

AU - Sissakian, AN

AU - Slunecka, M

AU - Smirnov, GI

AU - Sosio, S

AU - Sozzi, F

AU - Srnka, A

AU - Stolarski, M

AU - Sulc, M

AU - Sulej, R

AU - Takekawa, S

AU - Tessaro, S

AU - Tessarotto, F

AU - Teufel, A

AU - Tkatchev, LG

AU - Uhl, S

AU - Uman, I

AU - Venugopal, G

AU - Virius, M

AU - Vlassov, NV

AU - Vossen, A

AU - Weitzel, Q

AU - Windmolders, R

AU - Wislicki, W

AU - Wollny, H

AU - Zaremba, K

AU - Zavertyaev, M

AU - Zemlyanichkina, E

AU - Ziembicki, M

AU - Zhao, J

AU - Zhuravlev, N

AU - Zvyagin, A.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π−π−π+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420 000 events taken at values of the squared 4-momentum transfer t′ between 0.1 and 1 GeV2/c2. The well-known resonances a1(1260), a2(1320), and π2(1670) are clearly observed. In addition, the data show a significant natural-parity exchange production of a resonance with spin-exotic quantum numbers JPC=1−+ at 1.66 GeV/c2 decaying to ρπ. The resonant nature of this wave is evident from the mass-dependent phase differences to the JPC=2−+ and 1++ waves. From a mass-dependent fit a resonance mass of (1660±10+0−64) MeV/c2 and a width of (269±21+42−64) MeV/c2 are deduced, with an intensity of (1.7±0.2)% of the total intensity.

AB - The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π−π−π+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420 000 events taken at values of the squared 4-momentum transfer t′ between 0.1 and 1 GeV2/c2. The well-known resonances a1(1260), a2(1320), and π2(1670) are clearly observed. In addition, the data show a significant natural-parity exchange production of a resonance with spin-exotic quantum numbers JPC=1−+ at 1.66 GeV/c2 decaying to ρπ. The resonant nature of this wave is evident from the mass-dependent phase differences to the JPC=2−+ and 1++ waves. From a mass-dependent fit a resonance mass of (1660±10+0−64) MeV/c2 and a width of (269±21+42−64) MeV/c2 are deduced, with an intensity of (1.7±0.2)% of the total intensity.

KW - COMPASS

KW - RICH

KW - COMPASS

KW - RICH

UR - https://iris.uniupo.it/handle/11579/23150

U2 - 10.1103/PhysRevLett.104.241803

DO - 10.1103/PhysRevLett.104.241803

M3 - Article

SN - 0031-9007

VL - 104

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

ER -

Observation of a J(PC)=1(-+) Exotic Resonance in Diffractive Dissociation of 190 GeV/c pi(-) into pi(-)pi(-)pi(+) RID D-4627-2011

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