Newbies What Next ? News Forums Calendar


News Sections
General News (3987/0)
Reviews (637/0)
Press Releases (465/0)
Distributions (197/0)
Software (912/0)
Hardware (537/0)
Security (192/0)
Tutorials (356/0)
Off Topic (181/0)

User Functions


Don't have an account yet? Sign up as a New User

There are no upcoming events



CompHEP is a software package for automatic computations in High Energy Physics from Lagrangians to collision events or particle decays.

The CompHEP package consists of two parts, symbolic and numerical programs. The symbolic part is written in the C programming language. It produces C codes for squared matrix elements, and they are used in the numerical calculation later on.

CompHEP is based on quantum theory of gauge fields. CompHEP includes the Standard Model Lagrangian in the unitarity and 't Hooft-Feynman gauges and several MSSM models. Users can also create new physical models, based on different Lagrangians, using a dedicated toool (LanHEP).

CompHEP computes the LO cross sections and distributions with several particles in the final state (up to 6-7). It can take into account, if necessary, all QCD and EW diagrams, masses of fermions and bosons and widths of unstable particles. Processes computed by means of CompHEP can be interfaced to the Monte-Carlo generators PYTHIA and HERWIG as new external processes.

 CompHEP 4.5.2

Free to download


Non-profit Use License

CompHEP team


System Requirements

User Manual, FAQ, Mailing List, Particle Physics Tour, LanHEP

Selected Reviews:
Physical results by means of CompHEP

Features include:

  • Select a process by specifying incoming and outgoing particles
  • Generate Feynman diagrams, display them, and create the corresponding LATEX output
  • Exclude some diagrams
  • Generate and display squared Feynman diagrams
  • Calculate analytical expressions corresponding to squared diagrams by using the fast built-in symbolic calculator
  • Save symbolic results corresponding to the squared diagrams calculated in the Reduce and Mathematica codes for further symbolic manipulations
  • Generate the optimized C codes for the squared matrix elements for further numerical calculations
  • Launch the make program in order to prepare the numerical part

The numerical part of CompHEP offers to:

  • Convolute the squared matrix element with structure functions and beam spectra: built-in CTEQ and LHAPDF parton distribution functions, the ISR and Beamstrahlung spectra of electrons, the laser photon spectrum, and the Weizsaecker-Williams photon structure functions are available
  • Modify physical parameters (total energy, charges, particle masses, charges, etc.) involved in the process
  • Select an evaluation scale for the QCD coupling constant and parton structure functions
  • Introduce various kinematic cuts. Some cuts are built in and there is a special code to define more involved cuts
  • Define a kinematic scheme (a phase space parameterization) for effective Monte Carlo integration
  • Introduce a phase space mapping in order to smooth sharp peaks of squared matrix elements and structure functions
  • Perform Monte-Carlo phase space integration by Vegas
  • Generate events
  • Display distributions of various kinematic variables
  • Create graphical and LATEX outputs for the histograms

CompHEP in action

Return to Scientific Home Page | Return to Physics Tools Home Page

Bookmark and Share

Last Updated Saturday, May 23 2015 @ 12:56 PM EDT

We have written a range of guides highlighting excellent free books for popular programming languages. Check out the following guides: C, C++, C#, Java, JavaScript, CoffeeScript, HTML, Python, Ruby, Perl, Haskell, PHP, Lisp, R, Prolog, Scala, Scheme, Forth, SQL, Node.js (new), Fortran (new), Erlang (new), Pascal (new), and Ada (new).

Group Tests
100 Essential Apps
All Group Tests

Top Free Software
5 Office Suites
3 Lean Desktops
7 Document Processors
4 Distraction Free Tools
9 Project Management
4 Business Solutions
9 Groupware Apps
14 File Managers
10 Databases
21 Backup Tools
21 Productivity Tools
5 Note Taking Apps
9 Terminal Emulators
21 Financial Tools
5 Bitcoin Clients
21 Text Editors
21 Video Emulators
21 Home Emulators
42 Graphics Apps
6 CAD Apps
42 Scientific Apps
10 Web Browsers
42 Email Apps
12 Instant Messaging
10 IRC Clients
7 Twitter Clients
12 News Aggregators
11 VoIP Apps
42 Best Games
9 Steam Games
42 Audio Apps
5 Music Streaming
42 Video Apps
5 YouTube Tools
80 Security Apps
9 System Monitoring
8 Geometry Apps
Free Console Apps
14 Multimedia
4 Audio Grabbers
9 Internet Apps
3 HTTP Clients
5 File Managers
8 Compilers
9 IDEs
9 Debuggers
7 Revision Control Apps
6 Doc Generators
Free Web Software
21 Web CMS
14 Wiki Engines
8 Blog Apps
6 eCommerce Apps
5 Human Resource Apps
10 ERP
10 CRM
6 Data Warehouse Apps
8 Business Intelligence
6 Point-of-Sale

Other Articles
Migrating from Windows
Back up your data
20 Free Linux Books
24 Beginner Books
12 Shell Scripting Books

Older Stories
Saturday 04/25
  • What are good command line HTTP clients? (0)

  • Sunday 04/12
  • First Peek at XBian on the Raspberry Pi 2 (0)

  • Saturday 04/04
  • First Look at OSMC RC on the Raspberry Pi 2 (0)

  • Sunday 03/29
  • First Steps with OpenELEC on the Raspberry Pi 2 (0)
  • Ubuntu MATE 15.04 for Raspberry Pi 2 (0)

  • Monday 03/16
  • MIPS Creator CI20 v Raspberry Pi 2 (0)
  • Raspberry Pi 2: Raspbian (ARMv6) v Linaro (ARMv7) (0)

  • Friday 03/06
  • Raspberry Pi 2 review (0)

  • Sunday 02/22
  • Chess in a Few Bytes (0)
  • Learn the Art of Computer Programming With These Great Free Beginner Books (2)

  • Vote

    What Linux distribution do you run on your main computer?

    859 votes | 3 comments

    Built with GeekLog and phpBB
    Comments to the webmaster are welcome
    Copyright 2009 - All rights reserved