## Abstract

We present the first measurement of the pseudorapidity density of primary charged particles in [Formula presented] collisions at [Formula presented]. For the [Formula presented] most central collisions, we obtain [Formula presented]. Compared to collisions at [Formula presented], the highest energy studied previously, an increase by a factor of [Formula presented] at [Formula presented] confidence level, is found. The energy dependence of the pseudorapidity density is discussed in comparison with data from proton-induced collisions and theoretical predictions.

Original language | English |
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Pages (from-to) | 4 |

Number of pages | 1 |

Journal | Physical Review Letters |

Volume | 88 |

Issue number | 2 |

DOIs | |

State | Published - 2002 |