3 research outputs found
Measurement of the reaction gamma*p->phi p in deep, inelastic e(+)p scattering at HERA
- Author
- Abbiendi G
- Abramowicz H
- Acosta D
- Adamczyk L
- Adamus M
- Amelung C
- An S H
- Arneodo M
- Ayad R
- Bacon T C
- Badgett W F
- Bailey D C
- Bailey D S
- Bamberger A
- Barbagli G
- Barberis E
- Bari G
- Barreiro F
- Bashindzhagyan G L
- Bashkirov V
- Basile M
- Bauerdick L A T
- Bednarek B
- Behrens U
- Beier H
- Bellagamba L
- Benard F
- Bertolin A
- Bhadra S
- Bienlein J K
- Biltzinger J
- Bogusz W
- Bornheim A
- Borzemski P
- Boscherini D
- Botje M
- Breitweg J
- Briskin G
- Brkic M
- Bromley J T
- Brook N H
- Brugnera R
- Brummer N
- Bruni A
- Bruni G
- Bruni P
- Bulmahn J
- Burow B D
- Bussey P J
- Butterworth I
- Butterworth J M
- Bylsma B
- Caldwell A
- CampbellRobson S
- Capua M
- Cardy M L
- Carlin R
- Cartiglia N
- Cases G
- Cashmore R J
- Cassidy A
- Castellini G
- Catterall C D
- Chapin D
- Chiba M
- Chlebana F
- Cho G H
- Chwastowski J
- Ciborowski J
- Cifarelli L
- Cindolo F
- Cirio R
- Cloth P
- Coldewey C
- Contin A
- CooperSarkar A M
- Corradi M
- Corriveau F
- Costa M
- Cottingham W N
- Crittenden J
- Cross R
- Dagan S
- DAgostini G
- DalCorso F
- Dannemann A
- Dardo M
- Dasu S
- Deffner R
- DeGiorgi M
- deKamps M
- delPeso J
- DePasquale S
- Deppe O
- Derrick M
- Desler K
- deTroconiz J F
- Devenish R C E
- deWolf E
- Doeker T
- Dolgoshein B A
- Dosselli U
- Doyle A T
- Drews G
- Dubbs T
- Dulinski Z
- Durkin L S
- Dyce N
- Eckert K
- Eisenberg Y
- Eisenhardt S
- Engelen J
- Ermolov P F
- Eskreys A
- Fagerstroem C P
- Feild R G
- Feld L
- Fernandez J P
- Ferrero M I
- Filges D
- Flasinski M
- Fleck J I
- Foster B
- Foudas C
- Frey A
- Frisken W R
- Gajewski J
- Gallo E
- Garcia Y Z
- Garfagnini A
- Geerts M
- George Simon
- Gialas I
- Gilkinson D J
- Gilmore J
- Giusti P
- Gladilin L K
- Glasman C
- Golubkov Y A
- Gottlicher P
- Grabosch H J
- Graciani R
- GrosseKnetter J
- Grothe M
- Grzelak G
- Haas T
- Hagge L
- Hain W
- Hamatsu R
- Hanna D S
- Harnew N
- Harris V L
- Hart J C
- Hartmann H
- Hartmann J
- Hartner G F
- Hasell D
- Hayes M E
- Heath G P
- Heath H F
- Heinloth K
- Heinz L
- Hernandez J M
- Hervas L
- Hessling H
- Heusch C
- Hilger E
- Hirose T
- Hochman D
- Holm U
- Homma K
- Horstmann D
- Howell G
- Hung B H Y
- Hung L W
- Iacobucci G
- Iannotti L
- Iga Y
- Inuzuka M
- Ishii T
- Jakob H P
- Jakubowski Z
- Jelen K
- Jing Z
- Johnson K F
- Jones T W
- Joo K K
- Joos P
- Karshon U
- Kartik S
- Kasemann M
- Kasprzak M
- Katz U F
- Kaziewicz P B
- Khakzad M
- Kharchilava A
- Kim H J
- Kisielewska D
- Kitamura S
- Klanner R
- Ko B J
- Kobrin V D
- Koch W
- Kooijman P
- Korzhavina I A
- Kotanski A
- Kotz U
- Kowalski H
- Kowalski T
- Krakauer D
- Kruse A
- Krzyzanowski M
- Kuze M
- Kuzmin V A
- Labarga L
- Labs J
- Ladage A
- Lamberti L
- Lancaster M
- Lane J B
- Laurenti G
- Lee S B
- Levi G
- Levman G M
- Levy A
- Li C
- Lim J N
- Limentani S
- Lindemann L
- Ling T Y
- Liu W
- Lockman W
- Lohr B
- Lohrmann E
- Long K R
- Loveless R J
- Lowe M
- Lu B
- Luke D
- Lukina O Y
- Maccarrone G
- Magill S
- Mainusch J
- Mallik U
- Manczak O
- Margotti A
- Mari S M
- Marini G
- Martin J F
- Martinez M
- Maselli S
- Massam T
- Matsushita T
- Matthews C G
- Mattingly M C K
- Mattingly S
- McCubbin N A
- McFall J D
- McNeil R R
- Mengel S
- Metcalf W
- Meyer A
- Mikunas D
- Milewski J
- Miller D B
- Mine S
- Mo L W
- Monteiro T
- Morandin M
- Muchorowski K
- Murray W N
- Musgrave B
- Nadendla V K
- Nakao M
- Nam S W
- Nania R
- Nath C
- Ng J S T
- Nigro A
- Notz D
- Nowak R J
- Noyes V A
- Nylander P
- Oh B Y
- Ohrenberg K
- Okrasinski J R
- Orr R S
- Palmonari F
- Park H S
- Park I H
- Park S K
- Parsons J A
- Patel P M
- Paul E
- Pavel N
- Pawlak J M
- Pelfer P
- Peroni C
- Pfeiffer M
- Piccioni D
- Piotrzkowski K
- Poelz G
- Polenz S
- Polini A
- Posocco M
- Prinias A
- Proskuryakov A S
- Przybycien M
- Przybycien M B
- Puga J
- Quadt A
- Rahn J T
- Reeder D D
- Rembser C
- Repond J
- Revel D
- Ritz S
- Riveline M
- Roco M
- Roff D G
- Rohde M
- Roldan J
- Romeo G C
- Rowanowski T A
- RulikowskaZarebska E
- Sacchi R
- Sadrozinski H F W
- Sampson C R
- Sartorelli G
- Saunders R L
- Savin A A
- Saxon D H
- Schioppa M
- Schlenstedt S
- Schmidke W B
- Schneekloth U
- Schott W
- Schramm D
- Schulz W
- Schwarzer O
- Sciulli F
- Sedgbeer J K
- Seiden A
- Seifert R J
- Selonke F
- Shah T P
- Shcheglova L M
- Shulman J
- Sideris D
- Silverstein S
- Simmons D
- Sinclair L E
- Sinkus R
- Smith W H
- Solano A
- Solomin A N
- Staiano A
- Stairs D G
- Stamm J
- Stanco L
- Stanek R
- Staub P B
- Stifutkin A
- StLaurent M
- Stroili R
- Surrow B
- Susinno G
- Suszycki L
- Sutton M R
- Suzuki I
- Talaga R L
- Tapper R J
- Tassi E
- Terron J
- Teuscher R J
- Tickner J R
- Tiecke H
- Tokushuku K
- Trefzger T
- Tsurugai T
- Tymieniecka T
- Uijterwaal H
- Ullmann R
- Umemori K
- Utley M L
- Vaiciulis A
- VanHook M
- vanSighem A
- vanWoudenberg R
- Verkerke W
- Voci C
- Voss T
- Vossebeld J
- Votano L
- Vreeswijk M
- Wai L
- Walczak R
- Walenta A H
- Wang M Z
- Wang S M
- Waters D S
- Wedemeyer R
- Westphal D
- Whitfield A F
- Whitmore J J
- Wick K
- Wiggers L
- Williams D C
- Wilson A S
- Wilson F F
- Wodarczyk M
- Wolf G
- Wolfle S
- Wollmer U
- Wroblewski A K
- Wu J T
- Wulff N
- Yamada S
- Yamauchi K
- Yamazaki Y
- Yang S
- Yip T
- Yoshida R
- Youngman C
- Zacek G
- Zachara M
- Zajac J
- Zakrzewski J A
- Zarnecki A F
- Zawiejski L
- Zech G
- ZerZion D
- Zetsche F
- Zeuner W
- Zhang H
- Zhu Q
- Zichichi A
- Zotov N P
- Zuin F
- Publication venue
- Publication date
- 04/07/1996
- Field of study
Measurement of the reaction gamma*p->phi p in deep, inelastic e(+)p scattering at HERA
- Author
- Abbiendi G
- Abramowicz H
- Acosta D
- Adamczyk L
- Adamus M
- Amelung C
- An S H
- Arneodo M
- Ayad R
- Bacon T C
- Badgett W F
- Bailey D C
- Bailey D S
- Bamberger A
- Barbagli G
- Barberis E
- Bari G
- Barreiro F
- Bashindzhagyan G L
- Bashkirov V
- Basile M
- Bauerdick L A T
- Bednarek B
- Behrens U
- Beier H
- Bellagamba L
- Benard F
- Bertolin A
- Bhadra S
- Bienlein J K
- Biltzinger J
- Bogusz W
- Bornheim A
- Borzemski P
- Boscherini D
- Botje M
- Breitweg J
- Briskin G
- Brkic M
- Bromley J T
- Brook N H
- Brugnera R
- Brummer N
- Bruni A
- Bruni G
- Bruni P
- Bulmahn J
- Burow B D
- Bussey P J
- Butterworth I
- Butterworth J M
- Bylsma B
- Caldwell A
- CampbellRobson S
- Capua M
- Cardy M L
- Carlin R
- Cartiglia N
- Cases G
- Cashmore R J
- Cassidy A
- Castellini G
- Catterall C D
- Chapin D
- Chiba M
- Chlebana F
- Cho G H
- Chwastowski J
- Ciborowski J
- Cifarelli L
- Cindolo F
- Cirio R
- Cloth P
- Coldewey C
- Contin A
- CooperSarkar A M
- Corradi M
- Corriveau F
- Costa M
- Cottingham W N
- Crittenden J
- Cross R
- Dagan S
- DAgostini G
- DalCorso F
- Dannemann A
- Dardo M
- Dasu S
- Deffner R
- DeGiorgi M
- deKamps M
- delPeso J
- DePasquale S
- Deppe O
- Derrick M
- Desler K
- deTroconiz J F
- Devenish R C E
- deWolf E
- Doeker T
- Dolgoshein B A
- Dosselli U
- Doyle A T
- Drews G
- Dubbs T
- Dulinski Z
- Durkin L S
- Dyce N
- Eckert K
- Eisenberg Y
- Eisenhardt S
- Engelen J
- Ermolov P F
- Eskreys A
- Fagerstroem C P
- Feild R G
- Feld L
- Fernandez J P
- Ferrero M I
- Filges D
- Flasinski M
- Fleck J I
- Foster B
- Foudas C
- Frey A
- Frisken W R
- Gajewski J
- Gallo E
- Garcia Y Z
- Garfagnini A
- Geerts M
- George Simon
- Gialas I
- Gilkinson D J
- Gilmore J
- Giusti P
- Gladilin L K
- Glasman C
- Golubkov Y A
- Gottlicher P
- Grabosch H J
- Graciani R
- GrosseKnetter J
- Grothe M
- Grzelak G
- Haas T
- Hagge L
- Hain W
- Hamatsu R
- Hanna D S
- Harnew N
- Harris V L
- Hart J C
- Hartmann H
- Hartmann J
- Hartner G F
- Hasell D
- Hayes M E
- Heath G P
- Heath H F
- Heinloth K
- Heinz L
- Hernandez J M
- Hervas L
- Hessling H
- Heusch C
- Hilger E
- Hirose T
- Hochman D
- Holm U
- Homma K
- Horstmann D
- Howell G
- Hung B H Y
- Hung L W
- Iacobucci G
- Iannotti L
- Iga Y
- Inuzuka M
- Ishii T
- Jakob H P
- Jakubowski Z
- Jelen K
- Jing Z
- Johnson K F
- Jones T W
- Joo K K
- Joos P
- Karshon U
- Kartik S
- Kasemann M
- Kasprzak M
- Katz U F
- Kaziewicz P B
- Khakzad M
- Kharchilava A
- Kim H J
- Kisielewska D
- Kitamura S
- Klanner R
- Ko B J
- Kobrin V D
- Koch W
- Kooijman P
- Korzhavina I A
- Kotanski A
- Kotz U
- Kowalski H
- Kowalski T
- Krakauer D
- Kruse A
- Krzyzanowski M
- Kuze M
- Kuzmin V A
- Labarga L
- Labs J
- Ladage A
- Lamberti L
- Lancaster M
- Lane J B
- Laurenti G
- Lee S B
- Levi G
- Levman G M
- Levy A
- Li C
- Lim J N
- Limentani S
- Lindemann L
- Ling T Y
- Liu W
- Lockman W
- Lohr B
- Lohrmann E
- Long K R
- Loveless R J
- Lowe M
- Lu B
- Luke D
- Lukina O Y
- Maccarrone G
- Magill S
- Mainusch J
- Mallik U
- Manczak O
- Margotti A
- Mari S M
- Marini G
- Martin J F
- Martinez M
- Maselli S
- Massam T
- Matsushita T
- Matthews C G
- Mattingly M C K
- Mattingly S
- McCubbin N A
- McFall J D
- McNeil R R
- Mengel S
- Metcalf W
- Meyer A
- Mikunas D
- Milewski J
- Miller D B
- Mine S
- Mo L W
- Monteiro T
- Morandin M
- Muchorowski K
- Murray W N
- Musgrave B
- Nadendla V K
- Nakao M
- Nam S W
- Nania R
- Nath C
- Ng J S T
- Nigro A
- Notz D
- Nowak R J
- Noyes V A
- Nylander P
- Oh B Y
- Ohrenberg K
- Okrasinski J R
- Orr R S
- Palmonari F
- Park H S
- Park I H
- Park S K
- Parsons J A
- Patel P M
- Paul E
- Pavel N
- Pawlak J M
- Pelfer P
- Peroni C
- Pfeiffer M
- Piccioni D
- Piotrzkowski K
- Poelz G
- Polenz S
- Polini A
- Posocco M
- Prinias A
- Proskuryakov A S
- Przybycien M
- Przybycien M B
- Puga J
- Quadt A
- Rahn J T
- Reeder D D
- Rembser C
- Repond J
- Revel D
- Ritz S
- Riveline M
- Roco M
- Roff D G
- Rohde M
- Roldan J
- Romeo G C
- Rowanowski T A
- RulikowskaZarebska E
- Sacchi R
- Sadrozinski H F W
- Sampson C R
- Sartorelli G
- Saunders R L
- Savin A A
- Saxon D H
- Schioppa M
- Schlenstedt S
- Schmidke W B
- Schneekloth U
- Schott W
- Schramm D
- Schulz W
- Schwarzer O
- Sciulli F
- Sedgbeer J K
- Seiden A
- Seifert R J
- Selonke F
- Shah T P
- Shcheglova L M
- Shulman J
- Sideris D
- Silverstein S
- Simmons D
- Sinclair L E
- Sinkus R
- Smith W H
- Solano A
- Solomin A N
- Staiano A
- Stairs D G
- Stamm J
- Stanco L
- Stanek R
- Staub P B
- Stifutkin A
- StLaurent M
- Stroili R
- Surrow B
- Susinno G
- Suszycki L
- Sutton M R
- Suzuki I
- Talaga R L
- Tapper R J
- Tassi E
- Terron J
- Teuscher R J
- Tickner J R
- Tiecke H
- Tokushuku K
- Trefzger T
- Tsurugai T
- Tymieniecka T
- Uijterwaal H
- Ullmann R
- Umemori K
- Utley M L
- Vaiciulis A
- VanHook M
- vanSighem A
- vanWoudenberg R
- Verkerke W
- Voci C
- Voss T
- Vossebeld J
- Votano L
- Vreeswijk M
- Wai L
- Walczak R
- Walenta A H
- Wang M Z
- Wang S M
- Waters D S
- Wedemeyer R
- Westphal D
- Whitfield A F
- Whitmore J J
- Wick K
- Wiggers L
- Williams D C
- Wilson A S
- Wilson F F
- Wodarczyk M
- Wolf G
- Wolfle S
- Wollmer U
- Wroblewski A K
- Wu J T
- Wulff N
- Yamada S
- Yamauchi K
- Yamazaki Y
- Yang S
- Yip T
- Yoshida R
- Youngman C
- Zacek G
- Zachara M
- Zajac J
- Zakrzewski J A
- Zarnecki A F
- Zawiejski L
- Zech G
- ZerZion D
- Zetsche F
- Zeuner W
- Zhang H
- Zhu Q
- Zichichi A
- Zotov N P
- Zuin F
- Publication venue
- Publication date
- 07/04/1996
- Field of study
The production of phi mesons in the reaction e(+)p --> e(+)phi p (phi --> K+K-), for 7 phi p cross section rises strongly with W. This behaviour is similar to that previously found for the gamma*p --> rho(0)p cross section. This strong dependence cannot be explained by production through soft pomeron exchange, It is, however, consistent with perturbative QCD expectations, where it reflects the rise of the gluon momentum density in the proton at small x. The ratio of sigma(phi)/sigma(rho(0)), which has previously been determined by ZEUS to be 0.065 +/- 0.013 (stat.) in photoproduction at a mean W of 70 GeV, is measured to be 0.18 +/- 0.05 (stat.) +/- 0.03 (syst.) at a mean Q(2) of 12.3 GeV2 and mean W of approximate to 100 GeV and is thus approaching at large Q(2) the value of 2/9 predicted from the quark charges of the vector mesons and a flavour independent production mechanism
Measurement of the reaction gamma*p->phi p in deep, inelastic e(+)p scattering at HERA
- Author
- Abbiendi G
- Abramowicz H
- Acosta D
- Adamczyk L
- Adamus M
- Amelung C
- An S H
- Arneodo M
- Ayad R
- Bacon T C
- Badgett W F
- Bailey D C
- Bailey D S
- Bamberger A
- Barbagli G
- Barberis E
- Bari G
- Barreiro F
- Bashindzhagyan G L
- Bashkirov V
- Basile M
- Bauerdick L A T
- Bednarek B
- Behrens U
- Beier H
- Bellagamba L
- Benard F
- Bertolin A
- Bhadra S
- Bienlein J K
- Biltzinger J
- Bogusz W
- Bornheim A
- Borzemski P
- Boscherini D
- Botje M
- Breitweg J
- Briskin G
- Brkic M
- Bromley J T
- Brook N H
- Brugnera R
- Brummer N
- Bruni A
- Bruni G
- Bruni P
- Bulmahn J
- Burow B D
- Bussey P J
- Butterworth I
- Butterworth J M
- Bylsma B
- Caldwell A
- CampbellRobson S
- Capua M
- Cardy M L
- Carlin R
- Cartiglia N
- Cases G
- Cashmore R J
- Cassidy A
- Castellini G
- Catterall C D
- Chapin D
- Chiba M
- Chlebana F
- Cho G H
- Chwastowski J
- Ciborowski J
- Cifarelli L
- Cindolo F
- Cirio R
- Cloth P
- Coldewey C
- Contin A
- CooperSarkar A M
- Corradi M
- Corriveau F
- Costa M
- Cottingham W N
- Crittenden J
- Cross R
- Dagan S
- DAgostini G
- DalCorso F
- Dannemann A
- Dardo M
- Dasu S
- Deffner R
- DeGiorgi M
- deKamps M
- delPeso J
- DePasquale S
- Deppe O
- Derrick M
- Desler K
- deTroconiz J F
- Devenish R C E
- deWolf E
- Doeker T
- Dolgoshein B A
- Dosselli U
- Doyle A T
- Drews G
- Dubbs T
- Dulinski Z
- Durkin L S
- Dyce N
- Eckert K
- Eisenberg Y
- Eisenhardt S
- Engelen J
- Ermolov P F
- Eskreys A
- Fagerstroem C P
- Feild R G
- Feld L
- Fernandez J P
- Ferrero M I
- Filges D
- Flasinski M
- Fleck J I
- Foster B
- Foudas C
- Frey A
- Frisken W R
- Gajewski J
- Gallo E
- Garcia Y Z
- Garfagnini A
- Geerts M
- George Simon
- Gialas I
- Gilkinson D J
- Gilmore J
- Giusti P
- Gladilin L K
- Glasman C
- Golubkov Y A
- Gottlicher P
- Grabosch H J
- Graciani R
- GrosseKnetter J
- Grothe M
- Grzelak G
- Haas T
- Hagge L
- Hain W
- Hamatsu R
- Hanna D S
- Harnew N
- Harris V L
- Hart J C
- Hartmann H
- Hartmann J
- Hartner G F
- Hasell D
- Hayes M E
- Heath G P
- Heath H F
- Heinloth K
- Heinz L
- Hernandez J M
- Hervas L
- Hessling H
- Heusch C
- Hilger E
- Hirose T
- Hochman D
- Holm U
- Homma K
- Horstmann D
- Howell G
- Hung B H Y
- Hung L W
- Iacobucci G
- Iannotti L
- Iga Y
- Inuzuka M
- Ishii T
- Jakob H P
- Jakubowski Z
- Jelen K
- Jing Z
- Johnson K F
- Jones T W
- Joo K K
- Joos P
- Karshon U
- Kartik S
- Kasemann M
- Kasprzak M
- Katz U F
- Kaziewicz P B
- Khakzad M
- Kharchilava A
- Kim H J
- Kisielewska D
- Kitamura S
- Klanner R
- Ko B J
- Kobrin V D
- Koch W
- Kooijman P
- Korzhavina I A
- Kotanski A
- Kotz U
- Kowalski H
- Kowalski T
- Krakauer D
- Kruse A
- Krzyzanowski M
- Kuze M
- Kuzmin V A
- Labarga L
- Labs J
- Ladage A
- Lamberti L
- Lancaster M
- Lane J B
- Laurenti G
- Lee S B
- Levi G
- Levman G M
- Levy A
- Li C
- Lim J N
- Limentani S
- Lindemann L
- Ling T Y
- Liu W
- Lockman W
- Lohr B
- Lohrmann E
- Long K R
- Loveless R J
- Lowe M
- Lu B
- Luke D
- Lukina O Y
- Maccarrone G
- Magill S
- Mainusch J
- Mallik U
- Manczak O
- Margotti A
- Mari S M
- Marini G
- Martin J F
- Martinez M
- Maselli S
- Massam T
- Matsushita T
- Matthews C G
- Mattingly M C K
- Mattingly S
- McCubbin N A
- McFall J D
- McNeil R R
- Mengel S
- Metcalf W
- Meyer A
- Mikunas D
- Milewski J
- Miller D B
- Mine S
- Mo L W
- Monteiro T
- Morandin M
- Muchorowski K
- Murray W N
- Musgrave B
- Nadendla V K
- Nakao M
- Nam S W
- Nania R
- Nath C
- Ng J S T
- Nigro A
- Notz D
- Nowak R J
- Noyes V A
- Nylander P
- Oh B Y
- Ohrenberg K
- Okrasinski J R
- Orr R S
- Palmonari F
- Park H S
- Park I H
- Park S K
- Parsons J A
- Patel P M
- Paul E
- Pavel N
- Pawlak J M
- Pelfer P
- Peroni C
- Pfeiffer M
- Piccioni D
- Piotrzkowski K
- Poelz G
- Polenz S
- Polini A
- Posocco M
- Prinias A
- Proskuryakov A S
- Przybycien M
- Przybycien M B
- Puga J
- Quadt A
- Rahn J T
- Reeder D D
- Rembser C
- Repond J
- Revel D
- Ritz S
- Riveline M
- Roco M
- Roff D G
- Rohde M
- Roldan J
- Romeo G C
- Rowanowski T A
- RulikowskaZarebska E
- Sacchi R
- Sadrozinski H F W
- Sampson C R
- Sartorelli G
- Saunders R L
- Savin A A
- Saxon D H
- Schioppa M
- Schlenstedt S
- Schmidke W B
- Schneekloth U
- Schott W
- Schramm D
- Schulz W
- Schwarzer O
- Sciulli F
- Sedgbeer J K
- Seiden A
- Seifert R J
- Selonke F
- Shah T P
- Shcheglova L M
- Shulman J
- Sideris D
- Silverstein S
- Simmons D
- Sinclair L E
- Sinkus R
- Smith W H
- Solano A
- Solomin A N
- Staiano A
- Stairs D G
- Stamm J
- Stanco L
- Stanek R
- Staub P B
- Stifutkin A
- StLaurent M
- Stroili R
- Surrow B
- Susinno G
- Suszycki L
- Sutton M R
- Suzuki I
- Talaga R L
- Tapper R J
- Tassi E
- Terron J
- Teuscher R J
- Tickner J R
- Tiecke H
- Tokushuku K
- Trefzger T
- Tsurugai T
- Tymieniecka T
- Uijterwaal H
- Ullmann R
- Umemori K
- Utley M L
- Vaiciulis A
- VanHook M
- vanSighem A
- vanWoudenberg R
- Verkerke W
- Voci C
- Voss T
- Vossebeld J
- Votano L
- Vreeswijk M
- Wai L
- Walczak R
- Walenta A H
- Wang M Z
- Wang S M
- Waters D S
- Wedemeyer R
- Westphal D
- Whitfield A F
- Whitmore J J
- Wick K
- Wiggers L
- Williams D C
- Wilson A S
- Wilson F F
- Wodarczyk M
- Wolf G
- Wolfle S
- Wollmer U
- Wroblewski A K
- Wu J T
- Wulff N
- Yamada S
- Yamauchi K
- Yamazaki Y
- Yang S
- Yip T
- Yoshida R
- Youngman C
- Zacek G
- Zachara M
- Zajac J
- Zakrzewski J A
- Zarnecki A F
- Zawiejski L
- Zech G
- ZerZion D
- Zetsche F
- Zeuner W
- Zhang H
- Zhu Q
- Zichichi A
- Zotov N P
- Zuin F
- Publication venue
- Publication date
- 07/04/1996
- Field of study
The production of phi mesons in the reaction e(+)p --> e(+)phi p (phi --> K+K-), for 7 phi p cross section rises strongly with W. This behaviour is similar to that previously found for the gamma*p --> rho(0)p cross section. This strong dependence cannot be explained by production through soft pomeron exchange, It is, however, consistent with perturbative QCD expectations, where it reflects the rise of the gluon momentum density in the proton at small x. The ratio of sigma(phi)/sigma(rho(0)), which has previously been determined by ZEUS to be 0.065 +/- 0.013 (stat.) in photoproduction at a mean W of 70 GeV, is measured to be 0.18 +/- 0.05 (stat.) +/- 0.03 (syst.) at a mean Q(2) of 12.3 GeV2 and mean W of approximate to 100 GeV and is thus approaching at large Q(2) the value of 2/9 predicted from the quark charges of the vector mesons and a flavour independent production mechanism