K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

Akhunzyanov, R.; Alexeev, M. G.; Alexeev, G. D.; Amoroso, A.; Andrieux, V.; Anfimov, N. V.; Anosov, V.; Antoshkin, A.; Augsten, K.; Augustyniak, W.; Austregesilo, A.; Azevedo, C. D. R.; Badełek, B.; Balestra, F.; Ball, M.; Barth, J.; Beck, R.; Bedfer, Y.; Bernhard, J.; Bicker, K.; Bielert, E. R.; Birsa, R.; Bodlak, M.; Bordalo, P.; Bradamante, F.; Bressan, A.; Büchele, M.; Burtsev, V. E.; Capozza, L.; Chang, W. -C.; Chatterjee, C.; Chiosso, M.; Chumakov, A. G.; Chung, S. -U.; Cicuttin, A.; Crespo, M. L.; Curiel, Q.; Dalla Torre, S.; Dasgupta, S. S.; Dasgupta, S.; Denisov, O. Yu.; Dhara, L.; Donskov, S. V.; Doshita, N.; Dreisbach, Ch.; Dünnweber, W.; Dusaev, R. R.; Dziewiecki, M.; Efremov, A.; Eversheim, P. D.; Faessler, M.; Ferrero, A.; Finger, M.; Finger, M.; Fischer, H.; Franco, C.; du Fresne von Hohenesche, N.; Friedrich, J. M.; Frolov, V.; Gautheron, F.; Gavrichtchouk, O. P.; Gerassimov, S.; Giarra, J.; Gnesi, I.; Gorzellik, M.; Grasso, A.; Gridin, A.; Grosse Perdekamp, M.; Grube, B.; Guskov, A.; Hahne, D.; Hamar, G.; von Harrach, D.; Heitz, R.; Herrmann, F.; Horikawa, N.; D'Hose, N.; Hsieh, C. -Y.; Huber, S.; Ishimoto, S.; Ivanov, A.; Iwata, T.; Jary, V.; Joosten, R.; Jörg, P.; Kabuß, E.; Kerbizi, A.; Ketzer, B.; Khaustov, G. V.; Khokhlov, Yu. A.; Kisselev, Yu.; Klein, F.; Koivuniemi, J. H.; Kolosov, V. N.; Kondo, K.; Konorov, I.; Konstantinov, V. F.; Kotzinian, A. M.; Kouznetsov, O. M.; Kral, Z.; Krämer, M.; Krinner, F.; Kroumchtein, Z. V.; Kulinich, Y.; Kunne, F.; Kurek, K.; Kurjata, R. P.; Kuznetsov, I. I.; Kveton, A.; Lednev, A. A.; Levchenko, E. A.; Levorato, S.; Lian, Y. -S.; Lichtenstadt, J.; Longo, R.; Lyubovitskij, V. E.; Maggiora, A.; Magnon, A.; Makins, N.; Makke, N.; Mallot, G. K.; Mamon, S. A.; Marchand, C.; Marianski, B.; Martin, A.; Marzec, J.; Matoušek, J.; Matsuda, H.; Matsuda, T.; Meshcheryakov, G. V.; Meyer, M.; Meyer, W.; Mikhailov, Yu. V.; Mikhasenko, M.; Mitrofanov, E.; Mitrofanov, N.; Miyachi, Y.; Moretti, A.; Nagaytsev, A.; Nerling, F.; Neyret, D.; Nový, J.; Nowak, W. -D.; Nukazuka, G.; Nunes, A. S.; Olshevsky, A. G.; Orlov, I.; Ostrick, M.; Panzieri, D.; Parsamyan, B.; Paul, S.; Peng, J. -C.; Pereira, F.; Pesaro, G.; Pešek, M.; Pešková, M.; Peshekhonov, D. V.; Pierre, N.; Platchkov, S.; Pochodzalla, J.; Polyakov, V. A.; Pretz, J.; Quaresma, M.; Quintans, C.; Ramos, S.; Regali, C.; Reicherz, G.; Riedl, C.; Ryabchikov, D. I.; Rybnikov, A.; Rychter, A.; Salac, R.; Samoylenko, V. D.; Sandacz, A.; Sarkar, S.; Savin, I. A.; Sawada, T.; Sbrizzai, G.; Schiavon, P.; Schmieden, H.; Seder, E.; Selyunin, A.; Silva, L.; Sinha, L.; Sirtl, S.; Slunecka, M.; Sozzi, F.; Smolik, J.; Srnka, A.; Steffen, D.; Stolarski, M.; Subrt, O.; Sulc, M.; Suzuki, H.; Szabelski, A.; Szameitat, T.; Sznajder, P.; Tasevsky, M.; Tessaro, S.; Tessarotto, F.; Thiel, A.; Tomsa, J.; Tosello, F.; Tskhay, V.; Uhl, S.; Vasilishin, B. I.; Vauth, A.; Veit, B. M.; Veloso, J.; Vidon, A.; Virius, M.; Wallner, S.; Wilfert, M.; Windmolders, R.; Zaremba, K.; Zavada, P.; Zavertyaev, M.; Zemlyanichkina, E.; Ziembicki, M.

doi:10.1016/j.physletb.2018.09.052

The K− over K+ multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction z of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar 6LiD target. The regime of deep-inelastic scattering is ensured by requiring Q2>1(GeV/c)2 for the photon virtuality and W>5GeV/c2 for the invariant mass of the produced hadronic system. Kaons are identified in the momentum range from 12 GeV/c to 40 GeV/c, thereby restricting the range in Bjorken-x to 0.01<x<0.40. The z-dependence of the multiplicity ratio is studied for z>0.75. For very large values of z, i.e. z>0.8, we observe the kaon multiplicity ratio to fall below the lower limits expected from calculations based on leading and next-to-leading order perturbative quantum chromodynamics. Also, the kaon multiplicity ratio shows a strong dependence on the missing mass of the single-kaon production process. This suggests that within the perturbative quantum chromodynamics formalism an additional correction may be required, which takes into account the phase space available for hadronisation.

K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

Akhunzyanov, R.;Alexeev, M. G.;Alexeev, G. D.;Amoroso, A.;Andrieux, V.;Anfimov, N. V.;Anosov, V.;Antoshkin, A.;Augsten, K.;Augustyniak, W.;Austregesilo, A.;Azevedo, C. D. R.;Badełek, B.;Balestra, F.;Ball, M.;Barth, J.;Beck, R.;Bedfer, Y.;Bernhard, J.;Bicker, K.;Bielert, E. R.;Birsa, R.;Bodlak, M.;Bordalo, P.;Bradamante, F.;Bressan, A.;Büchele, M.;Burtsev, V. E.;Capozza, L.;Chang, W. -C.;Chatterjee, C.;Chiosso, M.;Chumakov, A. G.;Chung, S. -U.;Cicuttin, A.;Crespo, M. L.;Curiel, Q.;Dalla Torre, S.;Dasgupta, S. S.;Dasgupta, S.;Denisov, O. Yu.;Dhara, L.;Donskov, S. V.;Doshita, N.;Dreisbach, Ch.;Dünnweber, W.;Dusaev, R. R.;Dziewiecki, M.;Efremov, A.;Eversheim, P. D.;Faessler, M.;Ferrero, A.;Finger, M.;Finger, M.;Fischer, H.;Franco, C.;du Fresne von Hohenesche, N.;Friedrich, J. M.;Frolov, V.;Gautheron, F.;Gavrichtchouk, O. P.;Gerassimov, S.;Giarra, J.;Gnesi, I.;Gorzellik, M.;Grasso, A.;Gridin, A.;Grosse Perdekamp, M.;Grube, B.;Guskov, A.;Hahne, D.;Hamar, G.;von Harrach, D.;Heitz, R.;Herrmann, F.;Horikawa, N.;d'Hose, N.;Hsieh, C. -Y.;Huber, S.;Ishimoto, S.;Ivanov, A.;Iwata, T.;Jary, V.;Joosten, R.;Jörg, P.;Kabuß, E.;Kerbizi, A.;Ketzer, B.;Khaustov, G. V.;Khokhlov, Yu. A.;Kisselev, Yu.;Klein, F.;Koivuniemi, J. H.;Kolosov, V. N.;Kondo, K.;Konorov, I.;Konstantinov, V. F.;Kotzinian, A. M.;Kouznetsov, O. M.;Kral, Z.;Krämer, M.;Krinner, F.;Kroumchtein, Z. V.;Kulinich, Y.;Kunne, F.;Kurek, K.;Kurjata, R. P.;Kuznetsov, I. I.;Kveton, A.;Lednev, A. A.;Levchenko, E. A.;Levorato, S.;Lian, Y. -S.;Lichtenstadt, J.;Longo, R.;Lyubovitskij, V. E.;Maggiora, A.;Magnon, A.;Makins, N.;Makke, N.;Mallot, G. K.;Mamon, S. A.;Marchand, C.;Marianski, B.;Martin, A.;Marzec, J.;Matoušek, J.;Matsuda, H.;Matsuda, T.;Meshcheryakov, G. V.;Meyer, M.;Meyer, W.;Mikhailov, Yu. V.;Mikhasenko, M.;Mitrofanov, E.;Mitrofanov, N.;Miyachi, Y.;Moretti, A.;Nagaytsev, A.;Nerling, F.;Neyret, D.;Nový, J.;Nowak, W. -D.;Nukazuka, G.;Nunes, A. S.;Olshevsky, A. G.;Orlov, I.;Ostrick, M.;Panzieri, D.;Parsamyan, B.;Paul, S.;Peng, J. -C.;Pereira, F.;Pesaro, G.;Pešek, M.;Pešková, M.;Peshekhonov, D. V.;Pierre, N.;Platchkov, S.;Pochodzalla, J.;Polyakov, V. A.;Pretz, J.;Quaresma, M.;Quintans, C.;Ramos, S.;Regali, C.;Reicherz, G.;Riedl, C.;Ryabchikov, D. I.;Rybnikov, A.;Rychter, A.;Salac, R.;Samoylenko, V. D.;Sandacz, A.;Sarkar, S.;Savin, I. A.;Sawada, T.;Sbrizzai, G.;Schiavon, P.;Schmieden, H.;Seder, E.;Selyunin, A.;Silva, L.;Sinha, L.;Sirtl, S.;Slunecka, M.;Sozzi, F.;Smolik, J.;Srnka, A.;Steffen, D.;Stolarski, M.;Subrt, O.;Sulc, M.;Suzuki, H.;Szabelski, A.;Szameitat, T.;Sznajder, P.;Tasevsky, M.;Tessaro, S.;Tessarotto, F.;Thiel, A.;Tomsa, J.;Tosello, F.;Tskhay, V.;Uhl, S.;Vasilishin, B. I.;Vauth, A.;Veit, B. M.;Veloso, J.;Vidon, A.;Virius, M.;Wallner, S.;Wilfert, M.;Windmolders, R.;Zaremba, K.;Zavada, P.;Zavertyaev, M.;Zemlyanichkina, E.;Ziembicki, M.

2018-01-01

Abstract

The K− over K+ multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction z of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar 6LiD target. The regime of deep-inelastic scattering is ensured by requiring Q2>1(GeV/c)2 for the photon virtuality and W>5GeV/c2 for the invariant mass of the produced hadronic system. Kaons are identified in the momentum range from 12 GeV/c to 40 GeV/c, thereby restricting the range in Bjorken-x to 0.010.75. For very large values of z, i.e. z>0.8, we observe the kaon multiplicity ratio to fall below the lower limits expected from calculations based on leading and next-to-leading order perturbative quantum chromodynamics. Also, the kaon multiplicity ratio shows a strong dependence on the missing mass of the single-kaon production process. This suggests that within the perturbative quantum chromodynamics formalism an additional correction may be required, which takes into account the phase space available for hadronisation.

Scheda breve

Scheda completa

	Anno
	
				2018
			
	Stato di pubblicazione
	
				Pubblicato
			
	Rivista
	
				PHYSICS LETTERS. SECTION B
			
	DOI
	
				https://dx.doi.org/10.1016/j.physletb.2018.09.052
			
	URL
	
				https://www.sciencedirect.com/science/article/pii/S0370269318307536
			
	Appare nelle tipologie:
	
				1.1 Articolo in Rivista

File in questo prodotto:

File	Dimensione	Formato
1-s2.0-S0370269318307536-main.pdf accesso aperto Tipologia: Documento in Versione Editoriale Licenza: Creative commons Dimensione 606.3 kB Formato Adobe PDF Visualizza/Apri	606.3 kB	Adobe PDF	Visualizza/Apri

Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2931693

ArTS Archivio della ricerca di Trieste

K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

2018-01-01

Abstract

Scheda breve

Scheda completa

Pubblicazioni consigliate

Citazioni

social impact

ArTS Archivio della ricerca di Trieste

K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy

2018-01-01

Abstract

Scheda breve Scheda completa

Pubblicazioni consigliate

Informazioni

Citazioni

social impact

Conferma cancellazione

Scheda breve

Scheda completa