001700255 001__ 1700255 001700255 005__ 20220810222611.0 001700255 0248_ $$aoai:cds.cern.ch:1700255$$pcerncds:CERN$$pcerncds:CERN:FULLTEXT$$pcerncds:FULLTEXT 001700255 0247_ $$2DOI$$a10.1016/j.nuclphysb.2014.07.020 001700255 035__ $$9arXiv$$aoai:arXiv.org:1405.6376 001700255 035__ $$9Inspire$$a1298025 001700255 037__ $$9arXiv$$aarXiv:1405.6376$$chep-ex 001700255 037__ $$aCERN-PH-EP-2014-096 001700255 041__ $$aeng 001700255 084__ $$2CERN Library$$aPH-EP-2014-096 001700255 088__ $$9CERN-PH-EP-DRAFT-COMPASS-2014-004 001700255 088__ $$aCERN-PH-EP-2014-096 001700255 100__ $$aAdolph, C.$$uErlangen - Nuremberg U. 001700255 245__ $$aSpin alignment and violation of the OZI rule in exclusive $\omega$ and $\phi$ production in pp collisions 001700255 260__ $$c2014-09 001700255 269__ $$aGeneva$$bCERN$$c16 May 2014 001700255 300__ $$a24 p 001700255 500__ $$9arXiv$$a23 pages, 13 figures and 5 tables 001700255 506__ [email protected] 001700255 506__ $$mcds-edboard-compass [CERN] 001700255 506__ $$mcds-ph-ep-publications-referee-non-lhc [CERN] 001700255 520__ $$aExclusive production of the isoscalar vector mesons $\omega$ and $\phi$ is measured with a 190 GeV$/c$ proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable $x_{F}$ of the fast proton. A significant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on $x_{F}$ and on the invariant mass $M_{p\mathrm{V}}$ of the system formed by fast proton $p_\mathrm{fast}$ and vector meson $V$ is discussed in terms of diffractive production of $p_\mathrm{fast}V$ resonances in competition with central production. The measurement of the spin density matrix element $\rho_{00}$ of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of these two major reaction types. Again, dependences of the alignment on $x_{F}$ and on $M_{p\mathrm{V}}$ are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to $\omega$ production which are absent in the case of the $\phi$ meson. Removing the low-mass $M_{p\mathrm{V}}$ resonant region, the OZI rule is found to be violated by a factor of eight, independently of $x_\mathrm{F}$. 001700255 520__ $$9HEPDATA$$hCERN-SPS. Exclusive production of the isoscalar vector mesons OMEGA and PHI is measured with a 190 GeV proton beam impinging on a liquid hydrogen target. The results presented here are obtained by selecting OMEGA and PHI mesons from the reactions P P --> P P OMEGA, OMEGA --> PI+ PI- PI0 and P P --> P P PHI, PHI --> K+ K-. The data were taken in 2008 and 2009 by the COMPASS experiment and correspond to an integrated luminosity of about 0.9 pb^{-1}. Cross section ratios are determined in three intervals of the Feynman variable XF of the fast proton. Its kinematic dependence on XF and on the invariant mass M(PV) of the system formed by the fast proton P(FAST) and vector meson V is presented. The cross section ratio is given by R(PHI/OMEGA) = (DSIG(P P --> P P PHI)/DXF) / (DSIG(P P --> P P OMEGA)/DXF). The OZI rule violation factor is also presented and is given by F(OZI) = R(PHI/OMEGA) / (TAN(DELTA(V)))**2 with (TAN(DELTA(V)))**2 being the OZI prediction. The measurement of the spin density matrix element RHO(00) of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of these two major reaction types. Again, dependences of the alignment on XF and on M(PV) are presented. 001700255 520__ $$9Elsevier$$aExclusive production of the isoscalar vector mesons ω and ϕ is measured with a 190 GeV/c proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable xF of the fast proton. A significant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on xF and on the invariant mass MpV of the system formed by fast proton pfast and vector meson V is discussed in terms of diffractive production of pfastV resonances in competition with central production. The measurement of the spin density matrix element ρ00 of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of these two major reaction types. Again, dependences of the alignment on xF and on MpV are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to ω production which are absent in the case of the ϕ meson. Removing the low-mass MpV resonant region, the OZI rule is found to be violated by a factor of eight, independently of xF . 001700255 520__ $$9arXiv$$aExclusive production of the isoscalar vector mesons $\omega$ and $\phi$ is measured with a 190 GeV$/c$ proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable $x_{F}$ of the fast proton. A significant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on $x_{F}$ and on the invariant mass $M_{p\mathrm{V}}$ of the system formed by fast proton $p_\mathrm{fast}$ and vector meson $V$ is discussed in terms of diffractive production of $p_\mathrm{fast}V$ resonances in competition with central production. The measurement of the spin density matrix element $\rho_{00}$ of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of these two major reaction types. Again, dependences of the alignment on $x_{F}$ and on $M_{p\mathrm{V}}$ are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to $\omega$ production which are absent in the case of the $\phi$ meson. Removing the low-mass $M_{p\mathrm{V}}$ resonant region, the OZI rule is found to be violated by a factor of eight, independently of $x_\mathrm{F}$. 001700255 540__ $$3preprint$$aCC-BY-4.0 001700255 540__ $$3publication$$aCC-BY-3.0$$fSCOAP3 001700255 542__ $$3preprint$$dCERN$$g2014 001700255 542__ $$3publication$$dThe Author(s)$$g2014 001700255 562__ $$cPublic comments 001700255 595__ $$aCERN EDS 001700255 595__ $$aCERN-PH-EP 001700255 595__ $$aLANL EDS 001700255 6531_ $$9CERN$$aQCD 001700255 6531_ $$9CERN$$abranching fraction 001700255 6531_ $$9CERN$$aparticle and resonance production 001700255 6531_ $$9CERN$$aexperimental results 001700255 6531_ $$9CERN$$aOZI rule 001700255 6531_ $$9CERN$$avector meson production 001700255 6531_ $$9CERN$$atensor polarisation 001700255 65017 $$2SzGeCERN$$aParticle Physics - Experiment 001700255 65027 $$2arXiv$$aNuclear Physics - Experiment 001700255 693__ $$aCERN SPS$$eCOMPASS NA58 001700255 690C_ $$aCERN 001700255 690C_ $$aARTICLE 001700255 695__ $$9LANL EDS$$ahep-ex 001700255 700__ $$aAkhunzyanov, R.$$uDubna, JINR 001700255 700__ $$aAlexeev, M.G.$$uTurin U. 001700255 700__ $$aAlexeev, G.D.$$uDubna, JINR 001700255 700__ $$aAmoroso, A.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aAndrieux, V.$$uDAPNIA, Saclay 001700255 700__ $$aAnosov, V.$$uDubna, JINR 001700255 700__ $$aAustregesilo, A.$$uCERN$$uMunich, Tech. U. 001700255 700__ $$aBadelek, B.$$uWarsaw U. 001700255 700__ $$aBalestra, F.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aBarth, J.$$uBonn U. 001700255 700__ $$aBaum, G.$$uBielefeld U. 001700255 700__ $$aBeck, R.$$uBonn U., HISKP 001700255 700__ $$aBedfer, Y.$$uDAPNIA, Saclay 001700255 700__ $$aBerlin, A.$$uRuhr U., Bochum 001700255 700__ $$aBernhard, J.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aBicker, K.$$uCERN$$uMunich, Tech. U. 001700255 700__ $$aBieling, J.$$uBonn U. 001700255 700__ $$aBirsa, R.$$uINFN, Trieste 001700255 700__ $$aBisplinghoff, J.$$uBonn U., HISKP 001700255 700__ $$aBodlak, M.$$uCharles U. 001700255 700__ $$aBoer, M.$$uDAPNIA, Saclay 001700255 700__ $$aBordalo, P.$$uLIP, Lisbon$$uLisbon, IST 001700255 700__ $$aBradamante, F.$$uTrieste U.$$uINFN, Trieste 001700255 700__ $$aBraun, C.$$uErlangen - Nuremberg U. 001700255 700__ $$aBressan, A.$$uTrieste U.$$uINFN, Trieste 001700255 700__ $$aBuchele, M.$$uFreiburg U. 001700255 700__ $$aBurtin, E.$$uDAPNIA, Saclay 001700255 700__ $$aCapozza, L.$$uDAPNIA, Saclay 001700255 700__ $$aChiosso, M.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aChung, S.U.$$uMunich, Tech. U.$$uPusan Natl. U.$$uBrookhaven 001700255 700__ $$aCicuttin, A.$$uICTP, Trieste$$uINFN, Trieste 001700255 700__ $$aCrespo, M.L.$$uICTP, Trieste$$uINFN, Trieste 001700255 700__ $$aCuriel, Q.$$uDAPNIA, Saclay 001700255 700__ $$aDalla Torre, S.$$uINFN, Trieste 001700255 700__ $$aDasgupta, S.S.$$uMatrivani Inst., Calcutta 001700255 700__ $$aDasgupta, S.$$uINFN, Trieste 001700255 700__ $$aDenisov, O.Yu.$$uINFN, Turin 001700255 700__ $$aDonskov, S.V.$$uKurchatov Inst., Moscow 001700255 700__ $$aDoshita, N.$$uYamagata U. 001700255 700__ $$aDuic, V.$$uTrieste U. 001700255 700__ $$aDunnweber, W.$$uMunich U. 001700255 700__ $$aDziewiecki, M.$$uWarsaw U. of Tech. 001700255 700__ $$aEfremov, A.$$uDubna, JINR 001700255 700__ $$aElia, C.$$uTrieste U.$$uINFN, Trieste 001700255 700__ $$aEversheim, P.D.$$uBonn U., HISKP 001700255 700__ $$aEyrich, W.$$uErlangen - Nuremberg U. 001700255 700__ $$aFaessler, M.$$uMunich U. 001700255 700__ $$aFerrero, A.$$uDAPNIA, Saclay 001700255 700__ $$aFilin, A.$$uKurchatov Inst., Moscow 001700255 700__ $$aFinger, M.$$iINSPIRE-00320280$$uCharles U. 001700255 700__ $$aFinger, M., Jr.$$jORCID:0000-0003-3155-2484$$uCharles U. 001700255 700__ $$aFischer, H.$$uFreiburg U. 001700255 700__ $$aFranco, C.$$uLIP, Lisbon 001700255 700__ $$avon Hohenesche, N. du Fresne$$uMainz U., Inst. Kernphys.$$uCERN 001700255 700__ $$aFriedrich, J.M.$$uMunich, Tech. U. 001700255 700__ $$aFrolov, V.$$uCERN 001700255 700__ $$aGautheron, F.$$uRuhr U., Bochum 001700255 700__ $$aGavrichtchouk, O.P.$$uDubna, JINR 001700255 700__ $$aGerassimov, S.$$uLebedev Inst.$$uMunich, Tech. U. 001700255 700__ $$aGeyer, R.$$uMunich U. 001700255 700__ $$aGnesi, I.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aGobbo, B.$$uINFN, Trieste 001700255 700__ $$aGoertz, S.$$uBonn U. 001700255 700__ $$aGorzellik, M.$$uFreiburg U. 001700255 700__ $$aGrabmuller, S.$$uMunich, Tech. U. 001700255 700__ $$aGrasso, A.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aGrube, B.$$uMunich, Tech. U. 001700255 700__ $$aGrussenmeyer, T.$$uFreiburg U. 001700255 700__ $$aGuskov, A.$$uDubna, JINR 001700255 700__ $$aGuthorl, T.$$uFreiburg U. 001700255 700__ $$aHaas, F.$$uMunich, Tech. U. 001700255 700__ $$avon Harrach, D.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aHahne, D.$$uBonn U. 001700255 700__ $$aHashimoto, R.$$uYamagata U. 001700255 700__ $$aHeinsius, F.H.$$uFreiburg U. 001700255 700__ $$aHerrmann, F.$$uFreiburg U. 001700255 700__ $$aHinterberger, F.$$uBonn U., HISKP 001700255 700__ $$aHoppner, Ch.$$uMunich, Tech. U. 001700255 700__ $$aHorikawa, N.$$uNagoya U.$$uChubu U. 001700255 700__ $$ad'Hose, N.$$uDAPNIA, Saclay 001700255 700__ $$aHuber, S.$$uMunich, Tech. U. 001700255 700__ $$aIshimoto, S.$$uYamagata U.$$uKEK, Tsukuba 001700255 700__ $$aIvanov, A.$$uDubna, JINR 001700255 700__ $$aIvanshin, Yu.$$uDubna, JINR 001700255 700__ $$aIwata, T.$$uYamagata U. 001700255 700__ $$aJahn, R.$$uBonn U., HISKP 001700255 700__ $$aJary, V.$$uPrague, Tech. U. 001700255 700__ $$aJasinski, P.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aJorg, P.$$uFreiburg U. 001700255 700__ $$aJoosten, R.$$uBonn U., HISKP 001700255 700__ $$aKabuss, E.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aKetzer, B.$$uMunich, Tech. U.$$uBonn U. 001700255 700__ $$aKhaustov, G.V.$$uKurchatov Inst., Moscow 001700255 700__ $$aKhokhlov, Yu. A.$$uKurchatov Inst., Moscow$$uMoscow, MIPT 001700255 700__ $$aKisselev, Yu.$$uDubna, JINR 001700255 700__ $$aKlein, F.$$uBonn U. 001700255 700__ $$aKlimaszewski, K.$$uWarsaw, Inst. Nucl. Studies 001700255 700__ $$aKoivuniemi, J.H.$$uRuhr U., Bochum 001700255 700__ $$aKolosov, V.N.$$uKurchatov Inst., Moscow 001700255 700__ $$aKondo, K.$$uYamagata U. 001700255 700__ $$aKonigsmann, K.$$uFreiburg U. 001700255 700__ $$aKonorov, I.$$uLebedev Inst.$$uMunich, Tech. U. 001700255 700__ $$aKonstantinov, V.F.$$uKurchatov Inst., Moscow 001700255 700__ $$aKotzinian, A.M.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aKouznetsov, O.$$uDubna, JINR 001700255 700__ $$aKramer, M.$$uMunich, Tech. U. 001700255 700__ $$aKroumchtein, Z.V.$$uDubna, JINR 001700255 700__ $$aKuchinski, N.$$uDubna, JINR 001700255 700__ $$aKunne, F.$$uDAPNIA, Saclay 001700255 700__ $$aKurek, K.$$uWarsaw, Inst. Nucl. Studies 001700255 700__ $$aKurjata, R.P.$$uWarsaw U. of Tech. 001700255 700__ $$aLednev, A.A.$$uKurchatov Inst., Moscow 001700255 700__ $$aLehmann, A.$$uErlangen - Nuremberg U. 001700255 700__ $$aLevillain, M.$$uDAPNIA, Saclay 001700255 700__ $$aLevorato, S.$$uINFN, Trieste 001700255 700__ $$aLichtenstadt, J.$$uTel Aviv U. 001700255 700__ $$aMaggiora, A.$$uINFN, Turin 001700255 700__ $$aMagnon, A.$$uDAPNIA, Saclay 001700255 700__ $$aMakke, N.$$uTrieste U.$$uINFN, Trieste 001700255 700__ $$aMallot, G.K.$$uCERN 001700255 700__ $$aMarchand, C.$$uDAPNIA, Saclay 001700255 700__ $$aMartin, A.$$uTrieste U.$$uINFN, Trieste 001700255 700__ $$aMarzec, J.$$uWarsaw U. of Tech. 001700255 700__ $$aMatousek, J.$$uCharles U. 001700255 700__ $$aMatsuda, H.$$uYamagata U. 001700255 700__ $$aMatsuda, T.$$uMiyazaki U. 001700255 700__ $$aMeshcheryakov, G.$$uDubna, JINR 001700255 700__ $$aMeyer, W.$$uRuhr U., Bochum 001700255 700__ $$aMichigami, T.$$uYamagata U. 001700255 700__ $$aMikhailov, Yu. V.$$uKurchatov Inst., Moscow 001700255 700__ $$aMiyachi, Y.$$uYamagata U. 001700255 700__ $$aNagaytsev, A.$$uDubna, JINR 001700255 700__ $$aNagel, T.$$uMunich, Tech. U. 001700255 700__ $$aNerling, F.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aNeubert, S.$$uMunich, Tech. U. 001700255 700__ $$aNeyret, D.$$uDAPNIA, Saclay 001700255 700__ $$aNikolaenko, V.I.$$uKurchatov Inst., Moscow 001700255 700__ $$aNovy, J.$$uPrague, Tech. U. 001700255 700__ $$aNowak, W.D.$$uFreiburg U. 001700255 700__ $$aNunes, A.S.$$uLIP, Lisbon 001700255 700__ $$aOlshevsky, A.G.$$uDubna, JINR 001700255 700__ $$aOrlov, I.$$uDubna, JINR 001700255 700__ $$aOstrick, M.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aPanknin, R.$$uBonn U. 001700255 700__ $$aPanzieri, D.$$uPiemonte Orientale U., Alessandria$$uINFN, Turin 001700255 700__ $$aParsamyan, B.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aPaul, S.$$uMunich, Tech. U. 001700255 700__ $$aPlatchkov, S.$$uDAPNIA, Saclay 001700255 700__ $$aPochodzalla, J.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aPolyakov, V.A.$$uKurchatov Inst., Moscow 001700255 700__ $$aPretz, J.$$uBonn U.$$uAachen, Tech. Hochsch. 001700255 700__ $$aQuaresma, M.$$uLIP, Lisbon 001700255 700__ $$aQuintans, C.$$uLIP, Lisbon 001700255 700__ $$aRamos, S.$$uLIP, Lisbon$$uLisbon, IST 001700255 700__ $$aRegali, C.$$uFreiburg U. 001700255 700__ $$aReicherz, G.$$uRuhr U., Bochum 001700255 700__ $$aRocco, E.$$uCERN 001700255 700__ $$aRossiyskaya, N.S.$$uDubna, JINR 001700255 700__ $$aRyabchikov, D.I.$$uKurchatov Inst., Moscow 001700255 700__ $$aRychter, A.$$uWarsaw U. of Tech. 001700255 700__ $$aSamoylenko, V.D.$$uKurchatov Inst., Moscow 001700255 700__ $$aSandacz, A.$$uWarsaw, Inst. Nucl. Studies 001700255 700__ $$aSapozhnikov, M.$$uDubna, JINR 001700255 700__ $$aSarkar, S.$$uMatrivani Inst., Calcutta 001700255 700__ $$aSavin, I.A.$$uDubna, JINR 001700255 700__ $$aSbrizzai, G.$$uTrieste U.$$uINFN, Trieste 001700255 700__ $$aSchiavon, P.$$uTrieste U.$$uINFN, Trieste 001700255 700__ $$aSchill, C.$$uFreiburg U. 001700255 700__ $$aSchluter, T.$$uMunich U. 001700255 700__ $$aSchmidt, K.$$uFreiburg U. 001700255 700__ $$aSchmieden, H.$$uBonn U. 001700255 700__ $$aSchonning, K.$$uCERN 001700255 700__ $$aSchopferer, S.$$uFreiburg U. 001700255 700__ $$aSchott, M.$$uCERN 001700255 700__ $$aShevchenko, O.Yu.$$uDubna, JINR 001700255 700__ $$aSilva, L.$$uLIP, Lisbon 001700255 700__ $$aSinha, L.$$uMatrivani Inst., Calcutta 001700255 700__ $$aSirtl, S.$$uFreiburg U. 001700255 700__ $$aSlunecka, M.$$uDubna, JINR 001700255 700__ $$aSosio, S.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aSozzi, F.$$uINFN, Trieste 001700255 700__ $$aSrnka, A.$$uInst. Sci. Instruments, Brno 001700255 700__ $$aSteiger, L.$$uINFN, Trieste 001700255 700__ $$aStolarski, M.$$uLIP, Lisbon 001700255 700__ $$aSulc, M.$$uLiberec Tech. U. 001700255 700__ $$aSulej, R.$$uWarsaw, Inst. Nucl. Studies 001700255 700__ $$aSuzuki, H.$$uYamagata U.$$uChubu U. 001700255 700__ $$aSzabelski, A.$$uWarsaw, Inst. Nucl. Studies 001700255 700__ $$aSzameitat, T.$$uFreiburg U. 001700255 700__ $$aSznajder, P.$$uWarsaw, Inst. Nucl. Studies 001700255 700__ $$aTakekawa, S.$$uTurin U.$$uINFN, Turin 001700255 700__ $$aWolbeek, J. ter$$uFreiburg U. 001700255 700__ $$aTessaro, S.$$uINFN, Trieste 001700255 700__ $$aTessarotto, F.$$uINFN, Trieste 001700255 700__ $$aThibaud, F.$$uDAPNIA, Saclay 001700255 700__ $$aUhl, S.$$uMunich, Tech. U. 001700255 700__ $$aUman, I.$$uMunich U. 001700255 700__ $$aVirius, M.$$uPrague, Tech. U. 001700255 700__ $$aWang, L.$$uRuhr U., Bochum 001700255 700__ $$aWeisrock, T.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aWilfert, M.$$uMainz U., Inst. Kernphys. 001700255 700__ $$aWindmolders, R.$$uBonn U. 001700255 700__ $$aWollny, H.$$uDAPNIA, Saclay 001700255 700__ $$aZaremba, K.$$uWarsaw U. of Tech. 001700255 700__ $$aZavertyaev, M.$$uLebedev Inst. 001700255 700__ $$aZemlyanichkina, E.$$uDubna, JINR 001700255 700__ $$aZiembicki, M.$$uWarsaw U. of Tech. 001700255 700__ $$aZink, A.$$uErlangen - Nuremberg U. 001700255 710__ $$5PH 001700255 710__ $$gCOMPASS collaboration 001700255 773__ $$c1078-1101$$pNucl. Phys. B$$v886$$y2014 001700255 859__ [email protected] 001700255 8564_ $$81062729$$s961179$$uhttp://cds.cern.ch/record/1700255/files/1-s2.0-S0550321314002399-main.pdf$$yElsevier Open Access article 001700255 8564_ $$81471590$$s10049$$uhttp://cds.cern.ch/record/1700255/files/fig1.png$$y00000 Mechanisms for exclusive vector meson production at high energies. Left: Resonant single diffractive dissociation of the beam proton to a resonance X with subsequent decay. Middle: Non-resonant single diffractive excitation of the beam proton. The blob in the upper vertex denotes both point-like and non-point-like interactions. Right: Central production. 001700255 8564_ $$81471591$$s10825$$uhttp://cds.cern.ch/record/1700255/files/fig6.png$$y00015 \phi/\omega 001700255 8564_ $$81471592$$s49420$$uhttp://cds.cern.ch/record/1700255/files/fig7.png$$y00016 The closed points represent the angular distributions of $\cos^{2}\theta$, where $\theta = \theta_H$ is the helicity angle of the $\omega$ meson (right panels) and of the $\phi$ meson (left panels) in different $x_\mathrm{F}$ regions. The open points show the corresponding distribution for the events in the sidebands around the $\omega$ peak in the $M(\pi^+\pi^-\pi^0)$ distribution. The crosses show the corresponding distribution (scaled by 0.5) for the events in the sidebands around the $\phi$ peak in the $M(K^+K^-)$ distribution. The lines are the results of linear fits as explained in the text. 001700255 8564_ $$81471593$$s960797$$uhttp://cds.cern.ch/record/1700255/files/scoap3-fulltext.pdf$$yArticle from SCOAP3 001700255 8564_ $$81471594$$s12225$$uhttp://cds.cern.ch/record/1700255/files/fig3b.png$$y00008 \pi^+\pi^-\pi^0 001700255 8564_ $$81471595$$s13947$$uhttp://cds.cern.ch/record/1700255/files/fig3a.png$$y00007 \pi^+\pi^-\pi^0 001700255 8564_ $$81471596$$s9077$$uhttp://cds.cern.ch/record/1700255/files/fig8.png$$y00017 Spin alignment $\rho_{00}$ extracted from the helicity angle distributions for $\phi$ and $\omega$ production as a function of $x_\mathrm{F}$ for several cuts on $p_\mathrm{V}$. 001700255 8564_ $$81471597$$s57548$$uhttp://cds.cern.ch/record/1700255/files/fig9.png$$y00018 Angular distributions of $\cos^{2}\theta$, where $\theta = \theta_H$ is the helicity angle of the $\omega$ meson in different $M_{p\omega}$ regions. From top left to bottom right, mass ranges in GeV/$c^2$: 1.8--2.0, 2.2--2.4, 2.4--2.6, 2.6--2.8, 2.8--3.0, 3.0--3.2, 3.2--3.4, 3.4--3.8. The open points show the corresponding distribution for the events in the sidebands around the $\omega$ peak in the $M(\pi^+\pi^-\pi^0)$ distribution. The lines are the results of linear fits as explained in the text. 001700255 8564_ $$81471598$$s7016$$uhttp://cds.cern.ch/record/1700255/files/fig4b.png$$y00010 Distributions of the invariant mass of the $pV$ system for $0.6 < x_\mathrm{F} < 0.9$. Left: The $M_{p\omega}$ spectrum. The background is subtracted using the sideband method. Right: The $M_{p\phi}$ spectrum. The background is subtracted using a polynomial fit described in Section\,\ref{sec:bgsub} and the uncertainty from the fit is included in the error bars. 001700255 8564_ $$81471599$$s14653$$uhttp://cds.cern.ch/record/1700255/files/fig4a.png$$y00009 Distributions of the invariant mass of the $pV$ system for $0.6 < x_\mathrm{F} < 0.9$. Left: The $M_{p\omega}$ spectrum. The background is subtracted using the sideband method. Right: The $M_{p\phi}$ spectrum. The background is subtracted using a polynomial fit described in Section\,\ref{sec:bgsub} and the uncertainty from the fit is included in the error bars. 001700255 8564_ $$81471600$$s7981$$uhttp://cds.cern.ch/record/1700255/files/fig11.png$$y00021 Spin alignment $\rho_{00}$ as a function of $M_{p\omega}$. 001700255 8564_ $$81471601$$s8189$$uhttp://cds.cern.ch/record/1700255/files/fig13.png$$y00023 Spin alignment $\rho_{00}$ extracted using $\Delta\vec{P}$ as reference axis as a function of $x_\mathrm{F}$ for different $p_\mathrm{V}$ cuts. 001700255 8564_ $$81471602$$s16727$$uhttp://cds.cern.ch/record/1700255/files/fig2e.png$$y00005 Upper panels: One-dimensional (integrated) acceptances for $p\,p\,\rightarrow\,p\,p\,\omega, \omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $p\,p\,\rightarrow\,p\,p\,\phi, \phi\,\rightarrow\,K^+K^-$ (right) as a function of $x_\mathrm{F}$ of the fast proton. Cuts used in the later analysis are illustrated by the vertical lines. Middle panels: $x_\mathrm{F}$ distributions for $pp\,\rightarrow\,pp\,\omega,\,\omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $pp\,\rightarrow\,pp\,\phi,\,\phi\,\rightarrow\,K^+K^-$, acceptance uncorrected. Lower panels: The same as shown in the middle panels, but acceptance corrected and for $0.6<x_\mathrm{F}<0.9$. 001700255 8564_ $$81471603$$s19572$$uhttp://cds.cern.ch/record/1700255/files/fig2d.png$$y00004 Upper panels: One-dimensional (integrated) acceptances for $p\,p\,\rightarrow\,p\,p\,\omega, \omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $p\,p\,\rightarrow\,p\,p\,\phi, \phi\,\rightarrow\,K^+K^-$ (right) as a function of $x_\mathrm{F}$ of the fast proton. Cuts used in the later analysis are illustrated by the vertical lines. Middle panels: $x_\mathrm{F}$ distributions for $pp\,\rightarrow\,pp\,\omega,\,\omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $pp\,\rightarrow\,pp\,\phi,\,\phi\,\rightarrow\,K^+K^-$, acceptance uncorrected. Lower panels: The same as shown in the middle panels, but acceptance corrected and for $0.6<x_\mathrm{F}<0.9$. 001700255 8564_ $$81471604$$s16854$$uhttp://cds.cern.ch/record/1700255/files/fig2f.png$$y00006 Upper panels: One-dimensional (integrated) acceptances for $p\,p\,\rightarrow\,p\,p\,\omega, \omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $p\,p\,\rightarrow\,p\,p\,\phi, \phi\,\rightarrow\,K^+K^-$ (right) as a function of $x_\mathrm{F}$ of the fast proton. Cuts used in the later analysis are illustrated by the vertical lines. Middle panels: $x_\mathrm{F}$ distributions for $pp\,\rightarrow\,pp\,\omega,\,\omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $pp\,\rightarrow\,pp\,\phi,\,\phi\,\rightarrow\,K^+K^-$, acceptance uncorrected. Lower panels: The same as shown in the middle panels, but acceptance corrected and for $0.6<x_\mathrm{F}<0.9$. 001700255 8564_ $$81471605$$s22629$$uhttp://cds.cern.ch/record/1700255/files/fig2a.png$$y00001 Upper panels: One-dimensional (integrated) acceptances for $p\,p\,\rightarrow\,p\,p\,\omega, \omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $p\,p\,\rightarrow\,p\,p\,\phi, \phi\,\rightarrow\,K^+K^-$ (right) as a function of $x_\mathrm{F}$ of the fast proton. Cuts used in the later analysis are illustrated by the vertical lines. Middle panels: $x_\mathrm{F}$ distributions for $pp\,\rightarrow\,pp\,\omega,\,\omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $pp\,\rightarrow\,pp\,\phi,\,\phi\,\rightarrow\,K^+K^-$, acceptance uncorrected. Lower panels: The same as shown in the middle panels, but acceptance corrected and for $0.6<x_\mathrm{F}<0.9$. 001700255 8564_ $$81471606$$s19105$$uhttp://cds.cern.ch/record/1700255/files/fig2c.png$$y00003 Upper panels: One-dimensional (integrated) acceptances for $p\,p\,\rightarrow\,p\,p\,\omega, \omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $p\,p\,\rightarrow\,p\,p\,\phi, \phi\,\rightarrow\,K^+K^-$ (right) as a function of $x_\mathrm{F}$ of the fast proton. Cuts used in the later analysis are illustrated by the vertical lines. Middle panels: $x_\mathrm{F}$ distributions for $pp\,\rightarrow\,pp\,\omega,\,\omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $pp\,\rightarrow\,pp\,\phi,\,\phi\,\rightarrow\,K^+K^-$, acceptance uncorrected. Lower panels: The same as shown in the middle panels, but acceptance corrected and for $0.6<x_\mathrm{F}<0.9$. 001700255 8564_ $$81471607$$s18333$$uhttp://cds.cern.ch/record/1700255/files/fig2b.png$$y00002 Upper panels: One-dimensional (integrated) acceptances for $p\,p\,\rightarrow\,p\,p\,\omega, \omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $p\,p\,\rightarrow\,p\,p\,\phi, \phi\,\rightarrow\,K^+K^-$ (right) as a function of $x_\mathrm{F}$ of the fast proton. Cuts used in the later analysis are illustrated by the vertical lines. Middle panels: $x_\mathrm{F}$ distributions for $pp\,\rightarrow\,pp\,\omega,\,\omega\,\rightarrow\,\pi^+\pi^-\pi^0$ (left) and $pp\,\rightarrow\,pp\,\phi,\,\phi\,\rightarrow\,K^+K^-$, acceptance uncorrected. Lower panels: The same as shown in the middle panels, but acceptance corrected and for $0.6<x_\mathrm{F}<0.9$. 001700255 8564_ $$81471608$$s9012$$uhttp://cds.cern.ch/record/1700255/files/fig5a.png$$y00011 p\omega 001700255 8564_ $$81471609$$s9454$$uhttp://cds.cern.ch/record/1700255/files/fig5b.png$$y00012 p\omega 001700255 8564_ $$81471610$$s10309$$uhttp://cds.cern.ch/record/1700255/files/fig5c.png$$y00013 p\omega 001700255 8564_ $$81471611$$s18095$$uhttp://cds.cern.ch/record/1700255/files/fig5d.png$$y00014 p\omega 001700255 8564_ $$81471612$$s751601$$uhttp://cds.cern.ch/record/1700255/files/arXiv:1405.6376.pdf 001700255 8564_ $$81471613$$s20609$$uhttp://cds.cern.ch/record/1700255/files/fig10a.png$$y00019 Angular distributions of $\cos^{2}\theta$, where $\theta = \theta_H$ is the helicity angle of the $\phi$ meson for 2.1\,GeV/$c^2$ $ < M_{p\phi} < $ 2.6\,GeV/$c^2$ (left) and 2.6\,GeV/$c^2$ $ < M_{p\phi} < $ 3.3\,GeV/$c^2$ (right). The open points show the corresponding distribution for the events in the sidebands around the $\phi$ peak in the $M(K^+K^-)$ distribution. The lines are the results of linear fits as explained in the text. 001700255 8564_ $$81471614$$s21127$$uhttp://cds.cern.ch/record/1700255/files/fig10b.png$$y00020 Angular distributions of $\cos^{2}\theta$, where $\theta = \theta_H$ is the helicity angle of the $\phi$ meson for 2.1\,GeV/$c^2$ $ < M_{p\phi} < $ 2.6\,GeV/$c^2$ (left) and 2.6\,GeV/$c^2$ $ < M_{p\phi} < $ 3.3\,GeV/$c^2$ (right). The open points show the corresponding distribution for the events in the sidebands around the $\phi$ peak in the $M(K^+K^-)$ distribution. The lines are the results of linear fits as explained in the text. 001700255 8564_ $$8879413$$s716873$$uhttp://cds.cern.ch/record/1700255/files/CERN-PH-EP-2014-096.pdf$$yFulltext 001700255 8564_ $$8878090$$s716873$$uhttp://cds.cern.ch/record/1700255/files/CERN-PH-EP-DRAFT-COMPASS-2014-004 - draft.pdf$$yDraft (restricted)$$zStamped by WebSubmit: 14/05/2014 001700255 8564_ $$8878090$$s515439$$uhttp://cds.cern.ch/record/1700255/files/CERN-PH-EP-DRAFT-COMPASS-2014-004 - draft.pdf?subformat=pdfa$$xpdfa$$yDraft (restricted)$$zStamped by WebSubmit: 14/05/2014 001700255 8564_ $$82317431$$s54571$$uhttp://cds.cern.ch/record/1700255/files/fig12.png$$y00022 P 001700255 8564_ $$82317430$$s306800$$uhttp://cds.cern.ch/record/1700255/files/S0550321314002399.xml$$yFulltext 001700255 9031_ $$aApproval requested for number CERN-PH-EP-2014-096$$bCERN-PH-EP-2014-096$$cEPPHAPP$$d2014-05-08 09:41:36$$e2014-05-15 09:41:[email protected]$$swaiting 001700255 9031_ $$aDocument approved$$bCERN-PH-EP-2014-096$$cEPPHAPP$$d2014-05-14 22:48:[email protected]$$sapproved 001700255 916__ $$sn$$w201420$$ya2014 001700255 960__ $$a13 001700255 980__ $$aCOMPASS_Papers 001700255 980__ $$aARTICLE