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----- A story about J/psi -----

----- Who is the first person who predicted J/psi suppression?

One of signals of Quark Gluon Plasma (QGP) in high energy heavy ion collisions is J/psi suppression. A paper, T.Matsui and H.Satz Physics Letter B178 (1986) 416, is the most famous paper and is frequently referred as a prediction of signal of QGP in the field of high energy heavy ion collisions. Of cause, the Matsui-Satz paper is the great paper and they showed the quantitative analysis of J/psi suppression as a function of temperature.

Do you know there is a paper that predicts J/psi suppression earlier than Matsui-Satz paper? That paper says J/psi suppression but no quantitative prediction. In the paper, the author says;

A related question is whether charmoniumlike clusters may still exist in a quark-gluon plasma. We have made tentative calculations by screened Coulombic potential and found that possibility small.

The above description do really indicate J/psi suppression in QGP! The paper that I wanted to mention is

T. Hashimoto, O. Miyamura, K. Hirose, and T. Kanki

Osaka University Preprint, OUAM-86-3-3 (3 March 1986),
Physical Review Letters 57 (1986) 2123 published 27 Oct 1986 (Received 27 May 1986)

On the other hand, Matsui-Satz paper is

T.Matsui and H.Satz

BNL-38344 (June 1986),
Physics Letter B178 (1986) 416 published 9 Oct 1986 (Received 17 July 1986)

You can see which paper is the first paper with your focusing the date received, can't you?.

Why I am writing this text

For honor of Prof. Dr. Osamu Miyamura.

Of cause, one of reasons is that I am familiar to Prof. Dr. Miyamura who is one of authors of PRL. I am standing on his side. Because I was in Hadron Physics group consisted of Prof. Osamu Miyamura and Prof. Toru Sugitate in Hiroshima University. This group is not as same as general group in universities.

Why?

Because the purpose of this group is study of QGP and therefore theoreticians and experimentalists are collaborate for the goal. (Generally, a group in an university or institute consists of only theoretician or experimentalist.) In the group, we work as the PHYSICIST not as a theoretician or an experimentalist. I am proud of what I am graduate from that kind of group and Department of Physics, Hiroshima University.

When I was writing my Ph.D. thesis, Prof. Miyamura give me his help for English. To be honest, I didn't know the existence of PRL about J/psi suppression at that time. After he checked my draft of Ph.D thesis, he told me a story about the fact.

Osamu has a result of J/psi suppression and collaborators of PRL know about it. One of author of OUAM 86-3-3 and PRL 57 (1986) 2123 had a talk in a conference and he met Dr. Matsui and told the idea of the J/psi suppression during the conference. After that, Dr. Matsui tried to calculate and wrote a paper which is now famous as prediction of J/psi suppression in QGP.

Unfortunately, the collaboration of Osamu was far from editor, on the other hand, Dr. Matsui was at a place where is close to editor. It means that Osamu took much longer time for communication with editor than Matsui. The priority of paper is normally considered as date published. Therefore, Matsui-Satz paper is famous, of cause, they showed qualitative results.

A rumor of Matsui's stealing Miyamura's ida (but that is fact by his testimony) made a dispute in the field. Osamu, however, didn't want to make society be in fruitless dispute. Therefore, he never argue a fight of priority of J/psi suppression.

The paper BNL-38344 (PLB178 (1986) 416) mentioned OUAM 86-3-3. However, the authors of the PLB did not refer OUAM 86-3-3 as the paper that says J/psi suppression. It seems to be very strange for me. If Matsui-Satz know and read OUAM 86-3-3, they should mention that the J/psi suppression was predicted by OUAM 86-3-3. On the other hand, they only say as the following.

We note here that the effect of decreasing confinement of c-cbar binding of the J/psi below the Tc was recently studied10.
(BNL-38344)

The reference 10 points to OUAM 86-3-3. The fact is, as I mention here, that OUAM 86-3-3 says J/psi suppression. This addresses two possibility;

  1. Matsui-Satz did NOT read the paper OUAM 86-3-3 carefully or
  2. they know that OUAM 86-3-3 says J/psi suppression, but IGNORED it by a reason.

I don't know a story which is standing on side of Matsui-Satz. However, what do you think?